Bibliography from ADS File: Strassmeier.Bib June 27, 2021 1

Total Page:16

File Type:pdf, Size:1020Kb

Bibliography from ADS File: Strassmeier.Bib June 27, 2021 1 Bibliography from ADS file: strassmeier.bib Barnes, S. A., Steffen, M., & Strassmeier, K. G., “16th Potsdam Thinkshop: August 16, 2021 The rotation periods of cool stars: Measurements, uses, connections and prospects”, 2020AN....341..485B ADS Mott, A., Steffen, M., Caffau, E., & Strassmeier, K. G., “Improving spectro- Fritzewski, D. J., Barnes, S. A., James, D. J., & Strassmeier, K. G., “Rotation scopic lithium abundances. Fitting functions for 3D non-LTE corrections in periods for cool stars in the open cluster NGC 3532. The transition from fast FGK stars of different metallicity”, 2020A&A...638A..58M ADS to slow rotation”, 2021A&A...652A..60F ADS Dupree, A., Chiavassa, A., Freytag, B., et al.: 2020, Focus on Betelgeuse, HST Kolecki, J. R., Wang, J., Johnson, J. A., et al., “Searching For Tran- Proposal 2020hst..prop16216D ADS siting Planets Around Halo Stars. I. Sample Selection and Validation”, Woodward, C. E., Pavlenko, Y. V., Evans, A., et al., “Lithium in T Coronae 2021arXiv210613251K ADS Borealis”, 2020AJ....159..231W ADS Weiss, W. W., Zwintz, K., Kuschnig, R., et al., “Space Photometry with Brite- Cauley, P. W., Shkolnik, E. L., Ilyin, I., et al., “No Consistent At- Constellation”, 2021Univ....7..199W ADS mospheric Absorption Detected for the Ultra-hot Jupiter WASP-189 b”, Jayasinghe, T., Stanek, K. Z., Thompson, T. A., et al., “A unicorn in monoceros: 2020RNAAS...4...53C ADS the 3 M_ dark companion to the bright, nearby red giant V723 Mon is a Dineva, E., Denker, C., Strassmeier, K. G., Ilyin, I., & Pevtsov, A. A., “Moni- non-interacting, mass-gap black hole candidate”, 2021MNRAS.504.2577J toring solar activity with PEPSI”, 2020IAUGA..30..351D ADS ADS Strassmeier, K. G., Ilyin, I., Keles, E., et al., “High-resolution spec- Woodward, C. E., Wagner, R. M., Starrfield, S., et al., “Further Optical Spectro- troscopy and spectropolarimetry of the total lunar eclipse January 2019”, scopic Observations of V1674 Herculis”, 2021ATel14723....1W ADS 2020A&A...635A.156S ADS Strassmeier, K. G., “Letter from the Editor”, 2021AN....342..606S ADS Strassmeier, K. G., Ilyin, I., Keles, E., et al., “VizieR Online Data Cat- Dineva, E., Pearson, J., Verman, M., et al., “Characterization of Chromospheric alog: Total lunar eclipse January 2019 spectra (Strassmeier+, 2020)”, Activity Based on Sun-as-a-star Spectral and Disk-resolved Observations”, 2020yCat..36350156S ADS 2021csss.confE.130D ADS Dineva, E., Denker, C., Verma, M., et al., “Sun-as-a-star observations of the Granzer, T., Weber, M., Strassmeier, K. G., & Dupree, A., “The Curious Case 2017 August 21 solar eclipse”, 2020IAUS..354..473D ADS of Betelgeuse”, 2021csss.confE..41G ADS Küker, M., Rüdiger, G., Oláh, K., & Strassmeier, K. G., “Cycle Alexoudi, X., Mallonn, M., Keles, E., Poppenhäger, K., & Strassmeier, K., times of early M dwarf stars: mean field models versus observations”, “Role of the impact parameter in exoplanet transmission spectroscopy”, 2020IAUS..354..116K ADS 2021csss.confE...9A ADS Strassmeier, K. G., “Letter from the Editor”, 2020AN....341....9S ADS Marconi, A., Abreu, M., Adibekyan, V., et al., “HIRES, the High-resolution Metcalfe, T. S., Kochukhov, O., Ilyin, I., et al., “LBT/PEPSI Spec- Spectrograph for the ELT”, 2021Msngr.182...27M ADS tropolarimetry of a Magnetic Topology Shift in Old Solar-type Stars”, Cauley, P. W., Wang, J., Shkolnik, E. L., et al., “Time-resolved Rotational Ve- 2020AAS...23513105M ADS locities in the Upper Atmosphere of WASP-33 b”, 2021AJ....161..152C Metcalfe, T. S., Kochukhov, O., Ilyin, I. V., et al., “LBT/PEPSI Spec- ADS tropolarimetry of a Magnetic Morphology Shift in Old Solar-type Stars”, 2019ApJ...887L..38M Di Varano, I., Yuan, S., Woche, M., Strassmeier, K. G., & Weber, M., “ELT- ADS HIRES the High Resolution Spectrograph for the ELT: status of the polariza- Keles, E., Mallonn, M., von Essen, C., et al., “The potassium absorption on tion ray tracing tool for the polarimetric unit”, 2020SPIE11451E..4GD HD189733b and HD209458b”, 2019MNRAS.489L..37K ADS ADS Strassmeier, K. G., Granzer, T., Weingrill, J., et al., “Project BMK10k: Zeiss Ballistische Messkammer with a 10k x 10k CCD for ground-based PLATO Weber, M., Strassmeier, K. G., Woche, M., Ilyin, I., & Järvinen, A., “Using 2019AN....340..712S raytracing to derive the expected performance of STELLA’s SES-VIS spectro- support”, ADS graph”, 2020SPIE11450E..1CW ADS Rüdiger, G., Küker, M., Käpylä, P. J., & Strassmeier, K. G., “Antisolar differen- tial rotation of slowly rotating cool stars”, 2019A&A...630A.109R ADS Weber, M., Woche, M., Strassmeier, K. G., Ilyin, I., & Järvinen, A., “Second Dupree, A., Chiavassa, A., Freytag, B., et al.: 2019, Focus on Betelgeuse, HST generation spectroscopic instrumentation for the STELLA robotic observa- Proposal 2019hst..prop15873D ADS tory”, 2020SPIE11449E..0JW ADS Verma, M., Balthasar, H., Denker, C., et al., “Photospheric Mag- Marconi, A., Abreu, M., Adibekyan, V., et al., “ELT-HIRES, the high resolution netic Fields of the Trailing Sunspots in Active Region NOAA 12396”, spectrograph for the ELT: the Phase A study and the path to construction”, 2019ASPC..526..291V ADS 2020SPIE11447E..26M ADS Balthasar, H., Gömöry, P., González Manrique, S. J., et al., “Spectropo- Strassmeier, K. G. & Weber, M., “On the binary orbit of Henry Draper one ( larimetric Observations of an Arch Filament System with GREGOR”, HD 1)”, 2020AN....341..983S ADS 2019ASPC..526..217B ADS Strassmeier, K. G., Granzer, T., Weber, M., et al., “BRITE photometry and Strassmeier, K. G., Carroll, T. A., & Ilyin, I. V., “Warm and cool starspots with STELLA spectroscopy of bright stars in Auriga: Rotation, pulsation, orbits, opposite polarities. A high-resolution Zeeman-Doppler-Imaging study of II 2020A&A...644A.104S and eclipses?”, ADS Pegasi with PEPSI”, 2019A&A...625A..27S ADS Hansen, C. J., Koch, A., Mashonkina, L., et al., “Mono-enriched stars and Strassmeier, K. G., Carroll, T. A., & Ilyin, I. V., “VizieR Online Data Catalog: II Galactic chemical evolution. Possible biases in observations and theory”, Pegasi spectra with PEPSI (Strassmeier+, 2019)”, 2019yCat..36250027S 2020A&A...643A..49H ADS ADS Strassmeier, K. G., Granzer, T., Weber, M., et al., “VizieR Online Data Strassmeier, K. G., “Stars and exoplanets in Stokes IQUV: a decadal opportunity Catalog: Auriga bright stars BRITE phot. and RV (Strassmeier+, 2020)”, for HIRES at the ELT”, 2019arXiv190405075S ADS 2020yCat..36440104S ADS Kovári,˝ Z., Strassmeier, K. G., Oláh, K., et al., “Surface magnetic activity of the Hansen, C. J., Koch, A., Mashonkina, L., et al., “VizieR Online Data Catalog: fast-rotating G5 giant IN Comae, central star of the faint planetary nebula Linelist (Hansen+, 2020)”, 2020yCat..36430049H ADS LoTr 5”, 2019A&A...624A..83K ADS Keles, E., Kitzmann, D., Mallonn, M., et al., “Probing the atmosphere of Mallonn, M., Köhler, J., Alexoudi, X., et al., “Low albedos of hot HD189733b with the Na I and K I lines”, 2020MNRAS.498.1023K ADS to ultra-hot Jupiters in the optical to near-infrared transition regime”, Wang, J., Wang, J. J., Ma, B., et al., “On the Chemical Abundance of HR 8799 2019A&A...624A..62M ADS and the Planet c”, 2020AJ....160..150W ADS Mallonn, M., Koehler, J., Alexoudi, X., et al., “VizieR Online Data Cat- Fritzewski, D. J., Barnes, S. A., James, D. J., & Strassmeier, K. G., “The rota- alog: HAT-P-32b differential photometry time series (Mallonn+, 2019)”, tion period distribution of the rich Pleiades-age southern open cluster NGC 2019yCat..36240062M ADS 2516. Existence of a representative zero-age main sequence distribution”, Cauley, P. W., Shkolnik, E. L., Ilyin, I., et al., “Atmospheric Dynamics and the 2020A&A...641A..51F ADS Variable Transit of KELT-9 b”, 2019AJ....157...69C ADS Dupree, A. K., Strassmeier, K. G., Matthews, L. D., et al., “Spatially Sablowski, D. P., Järvinen, S., Ilyin, I., & Strassmeier, K. G., “Carbon 12C/13C Resolved Ultraviolet Spectroscopy of the Great Dimming of Betelgeuse”, isotope ratio of α Aurigae revised”, 2019A&A...622L..11S ADS 2020ApJ...899...68D ADS Ilin, E., Schmidt, S. J., Davenport, J. R. A., & Strassmeier, K. G., “Flares in Alexoudi, X., Mallonn, M., Keles, E., et al., “Role of the impact parameter in open clusters with K2 . I. M 45 (Pleiades), M 44 (Praesepe), and M 67”, exoplanet transmission spectroscopy”, 2020A&A...640A.134A ADS 2019A&A...622A.133I ADS Fritzewski, D. J., Barnes, S. A., James, D. J., & Strassmeier, K. G., “VizieR Fritzewski, D. J., Barnes, S. A., James, D. J., et al., “Spectroscopic Online Data Catalog: NGC 2516 membership list (Fritzewski+, 2020)”, membership for the populous 300 Myr-old open cluster NGC 3532”, 2020yCat..36410051F ADS 2019A&A...622A.110F ADS Warmuth, A., Önel, H., Mann, G., et al., “The STIX Aspect System (SAS): Mallonn, M., von Essen, C., Herrero, E., et al., “Ephemeris refinement of 21 hot The Optical Aspect System of the Spectrometer/Telescope for Imaging X-Rays Jupiter exoplanets with high timing uncertainties”, 2019A&A...622A..81M (STIX) on Solar Orbiter”, 2020SoPh..295...90W ADS ADS 1 Küker, M., Rüdiger, G., Olah, K., & Strassmeier, K. G., “Cycle pe- Roettenbacher, R. M., Monnier, J. D., Korhonen, H., et al., “Contemporaneous riod, differential rotation, and meridional flow for early M dwarf stars”, Imaging Comparisons of the Spotted Giant σ Geminorum Using Interfero- 2019A&A...622A..40K ADS metric, Spectroscopic, and Photometric Data”, 2017ApJ...849..120R Mallonn, M., von Essen, C., Herrero, E., et al., “VizieR Online Data ADS Catalog: 15 hot Jupiter exoplanets light curves (Mallonn+, 2019)”, González Manrique, S. J., Denker, C., Kuckein, C., et al., “Flows along 2019yCat..36220081M ADS arch filaments observed in the GRIS ‘very fast spectroscopic mode’”, Järvinen, S. P., Strassmeier, K. G., Carroll, T. A., Ilyin, I., & Weber, M., “Map- 2017IAUS..327...28G ADS ping EK Draconis with PEPSI. Possible evidence for starspot penumbrae”, Kovári,˝ Z., Oláh, K., Kriskovics, L., et al., “Rotation-differential rotation re- 2018A&A...620A.162J ADS lationships for late-type single and binary stars from Doppler imaging”, Alexoudi, X., Mallonn, M., von Essen, C., et al., “Deciphering the atmosphere 2017AN....338..903K ADS of HAT-P-12b: solving discrepant results”, 2018A&A...620A.142A ADS Fournier, Y., Arlt, R., Ziegler, U., & Strassmeier, K.
Recommended publications
  • Université De Montréal Relevé Polarimétrique D'étoiles Candidates
    Université de Montréal Relevé polarimétrique d’étoiles candidates pour des disques de débris par Amélie Simon Département de physique Faculté des arts et des sciences Mémoire présenté à la Faculté des études supérieures en vue de l’obtention du grade de Maître ès sciences (M.Sc.) en physique Août, 2010 c Amélie Simon, 2010 Université de Montréal Faculté des études supérieures Ce mémoire intitulé: Relevé polarimétrique d’étoiles candidates pour des disques de débris présenté par: Amélie Simon a été évalué par un jury composé des personnes suivantes: Serge Demers, président-rapporteur Pierre Bastien, directeur de recherche Gilles Fontaine, membre du jury Mémoire accepté le: Sommaire Le relevé DEBRIS est effectué par le télescope spatial Herschel. Il permet d’échantillonner les disques de débris autour d’étoiles de l’environnement solaire. Dans la première partie de ce mémoire, un relevé polarimétrique de 108 étoiles des candidates de DEBRIS est présenté. Utilisant le polarimètre de l’Observatoire du Mont-Mégantic, des observations ont été effec- tuées afin de détecter la polarisation due à la présence de disques de débris. En raison d’un faible taux de détection d’étoiles polarisées, une analyse statistique a été réalisée dans le but de comparer la polarisation d’étoiles possédant un excès dans l’infrarouge et la polarisation de celles n’en possédant pas. Utilisant la théorie de diffusion de Mie, un modèle a été construit afin de prédire la polarisation due à un disque de débris. Les résultats du modèle sont cohérents avec les observations. La deuxième partie de ce mémoire présente des tests optiques du polarimètre POL-2, construit à l’Université de Montréal.
    [Show full text]
  • Messier Objects
    Messier Objects From the Stocker Astroscience Center at Florida International University Miami Florida The Messier Project Main contributors: • Daniel Puentes • Steven Revesz • Bobby Martinez Charles Messier • Gabriel Salazar • Riya Gandhi • Dr. James Webb – Director, Stocker Astroscience center • All images reduced and combined using MIRA image processing software. (Mirametrics) What are Messier Objects? • Messier objects are a list of astronomical sources compiled by Charles Messier, an 18th and early 19th century astronomer. He created a list of distracting objects to avoid while comet hunting. This list now contains over 110 objects, many of which are the most famous astronomical bodies known. The list contains planetary nebula, star clusters, and other galaxies. - Bobby Martinez The Telescope The telescope used to take these images is an Astronomical Consultants and Equipment (ACE) 24- inch (0.61-meter) Ritchey-Chretien reflecting telescope. It has a focal ratio of F6.2 and is supported on a structure independent of the building that houses it. It is equipped with a Finger Lakes 1kx1k CCD camera cooled to -30o C at the Cassegrain focus. It is equipped with dual filter wheels, the first containing UBVRI scientific filters and the second RGBL color filters. Messier 1 Found 6,500 light years away in the constellation of Taurus, the Crab Nebula (known as M1) is a supernova remnant. The original supernova that formed the crab nebula was observed by Chinese, Japanese and Arab astronomers in 1054 AD as an incredibly bright “Guest star” which was visible for over twenty-two months. The supernova that produced the Crab Nebula is thought to have been an evolved star roughly ten times more massive than the Sun.
    [Show full text]
  • Explore the Universe Observing Certificate Second Edition
    RASC Observing Committee Explore the Universe Observing Certificate Second Edition Explore the Universe Observing Certificate Welcome to the Explore the Universe Observing Certificate Program. This program is designed to provide the observer with a well-rounded introduction to the night sky visible from North America. Using this observing program is an excellent way to gain knowledge and experience in astronomy. Experienced observers find that a planned observing session results in a more satisfying and interesting experience. This program will help introduce you to amateur astronomy and prepare you for other more challenging certificate programs such as the Messier and Finest NGC. The program covers the full range of astronomical objects. Here is a summary: Observing Objective Requirement Available Constellations and Bright Stars 12 24 The Moon 16 32 Solar System 5 10 Deep Sky Objects 12 24 Double Stars 10 20 Total 55 110 In each category a choice of objects is provided so that you can begin the certificate at any time of the year. In order to receive your certificate you need to observe a total of 55 of the 110 objects available. Here is a summary of some of the abbreviations used in this program Instrument V – Visual (unaided eye) B – Binocular T – Telescope V/B - Visual/Binocular B/T - Binocular/Telescope Season Season when the object can be best seen in the evening sky between dusk. and midnight. Objects may also be seen in other seasons. Description Brief description of the target object, its common name and other details. Cons Constellation where object can be found (if applicable) BOG Ref Refers to corresponding references in the RASC’s The Beginner’s Observing Guide highlighting this object.
    [Show full text]
  • Naming the Extrasolar Planets
    Naming the extrasolar planets W. Lyra Max Planck Institute for Astronomy, K¨onigstuhl 17, 69177, Heidelberg, Germany [email protected] Abstract and OGLE-TR-182 b, which does not help educators convey the message that these planets are quite similar to Jupiter. Extrasolar planets are not named and are referred to only In stark contrast, the sentence“planet Apollo is a gas giant by their assigned scientific designation. The reason given like Jupiter” is heavily - yet invisibly - coated with Coper- by the IAU to not name the planets is that it is consid- nicanism. ered impractical as planets are expected to be common. I One reason given by the IAU for not considering naming advance some reasons as to why this logic is flawed, and sug- the extrasolar planets is that it is a task deemed impractical. gest names for the 403 extrasolar planet candidates known One source is quoted as having said “if planets are found to as of Oct 2009. The names follow a scheme of association occur very frequently in the Universe, a system of individual with the constellation that the host star pertains to, and names for planets might well rapidly be found equally im- therefore are mostly drawn from Roman-Greek mythology. practicable as it is for stars, as planet discoveries progress.” Other mythologies may also be used given that a suitable 1. This leads to a second argument. It is indeed impractical association is established. to name all stars. But some stars are named nonetheless. In fact, all other classes of astronomical bodies are named.
    [Show full text]
  • A Decade of Starspot Activity on the Eclipsing Short-Period RS Canum Venaticorum Star WY Cancri: 1988-1997
    Swarthmore College Works Physics & Astronomy Faculty Works Physics & Astronomy 3-1-1998 A Decade Of Starspot Activity On The Eclipsing Short-Period RS Canum Venaticorum Star WY Cancri: 1988-1997 P. A. Heckert G. V. Maloney M. C. Stewart J. I. Ordway Mary Ann Hickman Swarthmore College, [email protected] See next page for additional authors Follow this and additional works at: https://works.swarthmore.edu/fac-physics Part of the Astrophysics and Astronomy Commons Let us know how access to these works benefits ouy Recommended Citation P. A. Heckert, G. V. Maloney, M. C. Stewart, J. I. Ordway, Mary Ann Hickman, and M. Zeilik. (1998). "A Decade Of Starspot Activity On The Eclipsing Short-Period RS Canum Venaticorum Star WY Cancri: 1988-1997". Astronomical Journal. Volume 115, Issue 3. 1145-1152. DOI: 10.1086/300238 https://works.swarthmore.edu/fac-physics/213 This work is brought to you for free by Swarthmore College Libraries' Works. It has been accepted for inclusion in Physics & Astronomy Faculty Works by an authorized administrator of Works. For more information, please contact [email protected]. Authors P. A. Heckert, G. V. Maloney, M. C. Stewart, J. I. Ordway, Mary Ann Hickman, and M. Zeilik This article is available at Works: https://works.swarthmore.edu/fac-physics/213 THE ASTRONOMICAL JOURNAL, 115:1145È1152, 1998 March ( 1998. The American Astronomical Society. All rights reserved. Printed in U.S.A. A DECADE OF STARSPOT ACTIVITY ON THE ECLIPSING SHORT-PERIOD RS CANUM VENATICORUM STAR WY CANCRI: 1988È1997 PAUL A.HECKERT,M GEORGE V.ALONEY,S MARIA C.
    [Show full text]
  • Two Rings but No Fellowship: Lotr 1 and Its Relation to Planetary Nebulae
    Mon. Not. R. Astron. Soc. 000, 1–16 (2013) Printed 17 October 2018 (MN LATEX style file v2.2) Two rings but no fellowship: LoTr 1 and its relation to planetary nebulae possessing barium central stars. A.A. Tyndall1,2⋆, D. Jones2, H.M.J. Boffin2, B. Miszalski3,4, F. Faedi5, M. Lloyd1, J.A. L´opez6, S. Martell7, D. Pollacco5, and M. Santander-Garc´ıa8 1Jodrell Bank Centre for Astrophysics, School of Physics and Astronomy, University of Manchester, M13 9PL, UK 2European Southern Observatory, Alonso de C´ordova 3107, Casilla 19001, Santiago, Chile 3South African Astronomical Observatory, PO Box 9, Observatory 7935, South Africa 4Southern African Large Telescope. PO Box 9, Observatory 7935, South Africa 5Department of Physics, University of Warwick, CV4 7AL, UK 6Instituto de Astronom´ıa, Universidad Nacional Aut´onoma de M´exico, Ensenada, Baja California, C.P. 22800, Mexico 7Australian Astronomical Observatory, North Ryde, 2109 NSW, Australia 8Observatorio Astron´omico National, Madrid, and Centro de Astrobiolog´ıa, CSIC-INTA, Spain Accepted xxxx xxxxxxxx xx. Received xxxx xxxxxxxx xx; in original form xxxx xxxxxxxx xx ABSTRACT LoTr 1 is a planetary nebula thought to contain an intermediate-period binary central star system ( that is, a system with an orbital period, P, between 100 and, say, 1500 days). The system shows the signature of a K-type, rapidly rotating giant, and most likely constitutes an accretion-induced post-mass transfer system similar to other PNe such as LoTr 5, WeBo 1 and A70. Such systems represent rare opportunities to further the investigation into the formation of barium stars and intermediate period post-AGB systems – a formation process still far from being understood.
    [Show full text]
  • VLBI for Gravity Probe B. VII. the Evolution of the Radio Structure Of
    Accepted to the Astrophysical Journal Supplement Series VLBI for Gravity Probe B. VII. The Evolution of the Radio Structure of IM Pegasi M. F. Bietenholz1,2, N. Bartel1, D. E. Lebach3, R. R. Ransom1,4, M. I. Ratner3, and I. I. Shapiro3 ABSTRACT We present measurements of the total radio flux density as well as very-long-baseline interferometry (VLBI) images of the star, IM Pegasi, which was used as the guide star for the NASA/Stanford relativity mission Gravity Probe B. We obtained flux densities and images from 35 sessions of observations at 8.4 GHz (λ = 3.6 cm) between 1997 January and 2005 July. The observations were accurately phase-referenced to several extragalactic reference sources, and we present the images in a star-centered frame, aligned by the position of the star as derived from our fits to its orbital motion, parallax, and proper motion. Both the flux density and the morphology of IM Peg are variable. For most sessions, the emission region has a single-peaked structure, but 25% of the time, we observed a two-peaked (and on one occasion perhaps a three-peaked) structure. On average, the emission region is elongated by 1.4 ± 0.4 mas (FWHM), with the average direction of elongation being close to that of the sky projection of the orbit normal. The average length of the emission region is approximately equal to the diameter of the primary star. No significant correlation with the orbital phase is found for either the flux density or the direction of elongation, and no preference for any particular longitude on the star is shown by the emission region.
    [Show full text]
  • WASP Page 1 Hubble Eyes Aging Stars Science News, Vol. 148
    WASP Warren Astronomical Society Paper Volume 27, number 11 $1.00 for non-members November 1995 DATING THE COSMOS COMPUTER CHATTER ANNUAL HOLIDAY AWARDS Hubble eyes aging stars Larry F. Kalinowski Science News, Vol. 148, September 2,1995 submitted by Lorna Simmons Everyone knows you can't be older than your mother. But over the past year, observations with the Hubble Space Telescope and several other Comet DeVico has just passed perihelion in instruments seem to have contradicted this cardi- early October, so its beginning to fade from its maxi- nal rule. On the one hand, measurements of the mum brightness of 5.6. It was recovered in its seventy- speed at which the most distant galaxies are mov- four year orbit by independent comet observers Naka- ing from Earth suggest that the universe may be mura, Tanaka and Utsunomiya. It becomes a sixth no older than 8 billion to 12 billion years (SN: magnitude object on the night of the Macomb meeting, 10/8;94, p.232). On the other hand, astronomers October 19. Early reports say it has two tails. A morn- ing object, only, about fifteen degrees above the hori- estimate he ages of our galaxy's oldest stars at zon before twilight begins, it's easily observed as it 13 billion to 16 billion years. leaves Leo and enters the Ursa Major-Coma Berenices Now, new findings from Hubble may provide a area of the sky. However, it is quickly moving closer to step toward resolving this cosmic conundrum. the horizon and will become increasingly more difficult In viewing the globular cluster M4, the dense to observe during the rest of the month.
    [Show full text]
  • Arxiv:0705.4290V2 [Astro-Ph] 23 Aug 2007
    DRAFT VERSION NOVEMBER 11, 2018 Preprint typeset using LATEX style emulateapj v. 08/13/06 THE GEMINI DEEP PLANET SURVEY – GDPS∗ DAVID LAFRENIÈREA,RENÉ DOYONA , CHRISTIAN MAROISB ,DANIEL NADEAUA, BEN R. OPPENHEIMERC,PATRICK F. ROCHED , FRANÇOIS RIGAUTE, JAMES R. GRAHAMF ,RAY JAYAWARDHANAG,DOUG JOHNSTONEH,PAUL G. KALASF ,BRUCE MACINTOSHB, RENÉ RACINEA Draft version November 11, 2018 ABSTRACT We present the results of the Gemini Deep Planet Survey, a near-infrared adaptive optics search for giant planets and brown dwarfs around nearby young stars. The observations were obtained with the Altair adaptive optics system at the Gemini North telescope and angular differential imaging was used to suppress the speckle noise of the central star. Detection limits for the 85 stars observed are presented, along with a list of all faint point sources detected around them. Typically, the observations are sensitive to angular separations beyond 0.5′′ with 5σ contrast sensitivities in magnitude difference at 1.6 µm of 9.5 at 0.5′′, 12.9 at 1′′, 15.0 at 2′′, and 16.5 at 5′′. For the typical target of the survey, a 100 Myr old K0 star located 22 pc from the Sun, the observations are sensitive enough to detect planets more massive than 2 MJup with a projected separation in the range 40–200 AU. Depending on the age, spectral type, and distance of the target stars, the detection limit can be as low as 1 MJup. Second epoch observations of 48 stars with candidates (out of 54) have confirmed that all candidates are∼ unrelated background stars. A detailed statistical analysis of the survey results, yielding upper limits on the fractions of stars with giant planet or low mass brown dwarf companions, is presented.
    [Show full text]
  • Australian Sky & Telescope
    TRANSIT MYSTERY Strange sights BINOCULAR TOUR Dive deep into SHOOT THE MOON Take amazing as Mercury crosses the Sun p28 Virgo’s endless pool of galaxies p56 lunar images with your smartphone p38 TEST REPORT Meade’s 25-cm LX600-ACF P62 THE ESSENTIAL MAGAZINE OF ASTRONOMY Lasers and advanced optics are transforming astronomy p20 HOW TO BUY THE RIGHT ASTRO CAMERA p32 p14 ISSUE 93 MAPPING THE BIG BANG’S COSMIC ECHOES $9.50 NZ$9.50 INC GST LPI-GLPI-G LUNAR,LUNAR, PLANETARYPLANETARY IMAGERIMAGER ANDAND GUIDERGUIDER ASTROPHOTOGRAPHY MADE EASY. Let the LPI-G unleash the inner astrophotographer in you. With our solar, lunar and planetary guide camera, experience the universe on a whole new level. 0Image Sensor:'+(* C O LOR 0 Pixel Size / &#*('+ 0Frames per second/Resolution• / • / 0 Image Format: #,+$)!&))'!,# .# 0 Shutter%,*('#(%%#'!"-,,* 0Interface: 0Driver: ASCOM compatible 0GuiderPort: 0Color or Monochrome Models (&#'!-,-&' FEATURED DEALERS: MeadeTelescopes Adelaide Optical Centre | www.adelaideoptical.com.au MeadeInstrument The Binocular and Telescope Shop | www.bintel.com.au MeadeInstruments www.meade.com Sirius Optics | www.sirius-optics.com.au The device to free you from your handbox. With the Stella adapter, you can wirelessly control your GoTo Meade telescope at a distance without being limited by cord length. Paired with our new planetarium app, *StellaAccess, astronomers now have a graphical interface for navigating the night sky. STELLA WI-FI ADAPTER / $#)'$!!+#!+ #$#)'#)$##)$#'&*' / (!-')-$*')!($%)$$+' "!!$#$)(,#%',).( StellaAccess app. Available for use on both phones and tablets. /'$+((()$!'%!#)'*")($'!$)##!'##"$'$*) stars, planets, celestial bodies and more /$,'-),',### -' ($),' /,,,$"$')*!!!()$$"%)!)!($%( STELLA is controlled with Meade’s planetarium app, StellaAccess. Available for purchase for both iOS S and Android systems.
    [Show full text]
  • International Astronomical Union Commission G1 BIBLIOGRAPHY of CLOSE BINARIES No
    International Astronomical Union Commission G1 BIBLIOGRAPHY OF CLOSE BINARIES No. 104 Editor-in-Chief: W. Van Hamme Editors: R.H. Barb´a D.R. Faulkner P.G. Niarchos D. Nogami R.G. Samec C.D. Scarfe C.A. Tout M. Wolf M. Zejda Material published by March 15, 2017 BCB issues are available at the following URLs: http://ad.usno.navy.mil/wds/bsl/G1_bcb_page.html, http://faculty.fiu.edu/~vanhamme/IAU-BCB/. The bibliographical entries for Individual Stars and Collections of Data, as well as a few General entries, are categorized according to the following coding scheme. Data from archives or databases, or previously published, are identified with an asterisk. The observation codes in the first four groups may be followed by one of the following wavelength codes. g. γ-ray. i. infrared. m. microwave. o. optical r. radio u. ultraviolet x. x-ray 1. Photometric data a. CCD b. Photoelectric c. Photographic d. Visual 2. Spectroscopic data a. Radial velocities b. Spectral classification c. Line identification d. Spectrophotometry 3. Polarimetry a. Broad-band b. Spectropolarimetry 4. Astrometry a. Positions and proper motions b. Relative positions only c. Interferometry 5. Derived results a. Times of minima b. New or improved ephemeris, period variations c. Parameters derivable from light curves d. Elements derivable from velocity curves e. Absolute dimensions, masses f. Apsidal motion and structure constants g. Physical properties of stellar atmospheres h. Chemical abundances i. Accretion disks and accretion phenomena j. Mass loss and mass exchange k. Rotational velocities 6. Catalogues, discoveries, charts a. Catalogues b. Discoveries of new binaries and novae c.
    [Show full text]
  • Time Series Analysis of Long-Term Photometry of the RS Cvn Star IM Pegasi
    Master's thesis International Master's Programme in Space Science Time series analysis of long-term photometry of the RS CVn star IM Pegasi Victor S, olea May 2013 Tutor: Doc. Lauri Jetsu Censors: Prof. Alexis Finoguenov Doc. Lauri Jetsu University of Helsinki Department of Physics P.O. Box 64 (Gustaf Hallstr¨ omin¨ katu 2a) FIN-00014 University of Helsinki Helsingin yliopisto | Helsingfors universitet | University of Helsinki Tiedekunta/Osasto | Fakultet/Sektion | Faculty Laitos | Institution | Department Faculty of Science Department of Physics Tekij¨a | F¨orfattare | Author Victor S, olea Ty¨on nimi | Arbetets titel | Title Time series analysis of long-term photometry of the RS CVn star IM Pegasi Oppiaine | L¨aro¨amne | Subject International Master's Programme in Space Science Ty¨on laji | Arbetets art | Level Aika | Datum | Month and year Sivum¨a¨ar¨a | Sidoantal | Number of pages Master's thesis May 2013 31 Tiivistelm¨a | Referat | Abstract We applied the Continuous Period Search (CPS) method to 23 years of V-band photometric data of the spectroscopic binary star IM Pegasi (primary: K2-class giant; secondary: G{ K-class dwarf). We studied the short and long-term activity changes of the light curve. Our modelling gave the mean magnitude, amplitude, period and the minima of the light curve, as well as their error estimates. There was not enough data to establish whether the long-term changes of the spot distribution followed an activity cycle. We also studied the differential rotation and detected that it was significantly stronger than expected, k ≥ 0:093. This result is based on the assumption that the law of solar differential rotation is valid also for IM Peg.
    [Show full text]