The Kepler Characterization of the Variability Among A- and F-Type Stars
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Pulsation and Rotation in NGC 6811: the Kepler Short-Cadence Stars
MNRAS 491, 4345–4364 (2020) doi:10.1093/mnras/stz3143 Advance Access publication 2019 November 12 Pulsation and rotation in NGC 6811: the Kepler short-cadence stars E. Rodr´ıguez ,1‹ L. A. Balona ,2‹ M. J. Lopez-Gonz´ alez,´ 1‹ S. Ocando,1 S. Mart´ın-Ruiz1 and C. Rodr´ıguez-Lopez´ 1 Downloaded from https://academic.oup.com/mnras/article-abstract/491/3/4345/5622881 by Universidad de Granada - Biblioteca user on 29 April 2020 1Instituto de Astrof´ısica de Andaluc´ıa, CSIC, PO Box 3004, E-18080 Granada, Spain 2South African Astronomical Observatory, PO Box 9, Observatory, Cape 2735, South Africa Accepted 2019 November 6. Received 2019 November 6; in original form 2019 September 11 ABSTRACT We have analysed a selected sample of 36 Kepler short-cadence stars in the field of NGC 6811. The results reveal that all the targets are variable: two red giant stars with solar-like oscillations, 21 main-sequence pulsators (16 δ Scuti and five γ Doradus stars), and 13 rotating variables. Three new γ Doradus (γ Dor) variables (one is a hot γ Dor star) are detected in this work together with five new rotating variables. An in-depth frequency analysis of the δ Scuti (δ Sct) and γ Dor stars in the sample shows that the frequency spectra are very rich, in particular for the δ Sct-type variables. They present very dense frequency distributions and wide diversity in frequency patterns, even for stars being members of the cluster and with very similar location in the Hertzsprung–Russell (H–R) diagram. -
Arxiv:1001.0139V1 [Astro-Ph.SR] 31 Dec 2009 Oadl Gilliland, L
Publications of the Astronomical Society of the Pacific Kepler Asteroseismology Program: Introduction and First Results Ronald L. Gilliland,1 Timothy M. Brown,2 Jørgen Christensen-Dalsgaard,3 Hans Kjeldsen,3 Conny Aerts,4 Thierry Appourchaux,5 Sarbani Basu,6 Timothy R. Bedding,7 William J. Chaplin,8 Margarida S. Cunha,9 Peter De Cat,10 Joris De Ridder,4 Joyce A. Guzik,11 Gerald Handler,12 Steven Kawaler,13 L´aszl´oKiss,7,14 Katrien Kolenberg,12 Donald W. Kurtz,15 Travis S. Metcalfe,16 Mario J.P.F.G. Monteiro,9 Robert Szab´o,14 Torben Arentoft,3 Luis Balona,17 Jonas Debosscher,4 Yvonne P. Elsworth,8 Pierre-Olivier Quirion,3,18 Dennis Stello,7 Juan Carlos Su´arez,19 William J. Borucki,20 Jon M. Jenkins,21 David Koch,20 Yoji Kondo,22 David W. Latham,23 Jason F. Rowe,20 and Jason H. Steffen24 arXiv:1001.0139v1 [astro-ph.SR] 31 Dec 2009 –2– ABSTRACT Asteroseismology involves probing the interiors of stars and quantifying their global properties, such as radius and age, through observations of normal modes of oscillation. The technical requirements for conducting asteroseismology in- clude ultra-high precision measured in photometry in parts per million, as well as nearly continuous time series over weeks to years, and cadences rapid enough 1Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA; [email protected] 2Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA 3Department of Physics and Astronomy, Aarhus University, DK-8000 Aarhus C, Denmark 4Instituut voor Sterrenkunde, K.U.Leuven, Celestijnenlaan 200 D, 3001, Leuven, Belgium 5Institut d’Astrophysique Spatiale, Universit´eParis XI, Bˆatiment 121, 91405 Orsay Cedex, France 6Astronomy Department, Yale University, P.O. -
Ghost Hunt Challenge 2020
Virtual Ghost Hunt Challenge 10/21 /2020 (Sorry we can meet in person this year or give out awards but try doing this challenge on your own.) Participant’s Name _________________________ Categories for the competition: Manual Telescope Electronically Aided Telescope Binocular Astrophotography (best photo) (if you expect to compete in more than one category please fill-out a sheet for each) ** There are four objects on this list that may be beyond the reach of beginning astronomers or basic telescopes. Therefore, we have marked these objects with an * and provided alternate replacements for you just below the designated entry. We will use the primary objects to break a tie if that’s needed. Page 1 TAS Ghost Hunt Challenge - Page 2 Time # Designation Type Con. RA Dec. Mag. Size Common Name Observed Facing West – 7:30 8:30 p.m. 1 M17 EN Sgr 18h21’ -16˚11’ 6.0 40’x30’ Omega Nebula 2 M16 EN Ser 18h19’ -13˚47 6.0 17’ by 14’ Ghost Puppet Nebula 3 M10 GC Oph 16h58’ -04˚08’ 6.6 20’ 4 M12 GC Oph 16h48’ -01˚59’ 6.7 16’ 5 M51 Gal CVn 13h30’ 47h05’’ 8.0 13.8’x11.8’ Whirlpool Facing West - 8:30 – 9:00 p.m. 6 M101 GAL UMa 14h03’ 54˚15’ 7.9 24x22.9’ 7 NGC 6572 PN Oph 18h12’ 06˚51’ 7.3 16”x13” Emerald Eye 8 NGC 6426 GC Oph 17h46’ 03˚10’ 11.0 4.2’ 9 NGC 6633 OC Oph 18h28’ 06˚31’ 4.6 20’ Tweedledum 10 IC 4756 OC Ser 18h40’ 05˚28” 4.6 39’ Tweedledee 11 M26 OC Sct 18h46’ -09˚22’ 8.0 7.0’ 12 NGC 6712 GC Sct 18h54’ -08˚41’ 8.1 9.8’ 13 M13 GC Her 16h42’ 36˚25’ 5.8 20’ Great Hercules Cluster 14 NGC 6709 OC Aql 18h52’ 10˚21’ 6.7 14’ Flying Unicorn 15 M71 GC Sge 19h55’ 18˚50’ 8.2 7’ 16 M27 PN Vul 20h00’ 22˚43’ 7.3 8’x6’ Dumbbell Nebula 17 M56 GC Lyr 19h17’ 30˚13 8.3 9’ 18 M57 PN Lyr 18h54’ 33˚03’ 8.8 1.4’x1.1’ Ring Nebula 19 M92 GC Her 17h18’ 43˚07’ 6.44 14’ 20 M72 GC Aqr 20h54’ -12˚32’ 9.2 6’ Facing West - 9 – 10 p.m. -
LIST of PUBLICATIONS Aryabhatta Research Institute of Observational Sciences ARIES (An Autonomous Scientific Research Institute
LIST OF PUBLICATIONS Aryabhatta Research Institute of Observational Sciences ARIES (An Autonomous Scientific Research Institute of Department of Science and Technology, Govt. of India) Manora Peak, Naini Tal - 263 129, India (1955−2020) ABBREVIATIONS AA: Astronomy and Astrophysics AASS: Astronomy and Astrophysics Supplement Series ACTA: Acta Astronomica AJ: Astronomical Journal ANG: Annals de Geophysique Ap. J.: Astrophysical Journal ASP: Astronomical Society of Pacific ASR: Advances in Space Research ASS: Astrophysics and Space Science AE: Atmospheric Environment ASL: Atmospheric Science Letters BA: Baltic Astronomy BAC: Bulletin Astronomical Institute of Czechoslovakia BASI: Bulletin of the Astronomical Society of India BIVS: Bulletin of the Indian Vacuum Society BNIS: Bulletin of National Institute of Sciences CJAA: Chinese Journal of Astronomy and Astrophysics CS: Current Science EPS: Earth Planets Space GRL : Geophysical Research Letters IAU: International Astronomical Union IBVS: Information Bulletin on Variable Stars IJHS: Indian Journal of History of Science IJPAP: Indian Journal of Pure and Applied Physics IJRSP: Indian Journal of Radio and Space Physics INSA: Indian National Science Academy JAA: Journal of Astrophysics and Astronomy JAMC: Journal of Applied Meterology and Climatology JATP: Journal of Atmospheric and Terrestrial Physics JBAA: Journal of British Astronomical Association JCAP: Journal of Cosmology and Astroparticle Physics JESS : Jr. of Earth System Science JGR : Journal of Geophysical Research JIGR: Journal of Indian -
Asteroseismic Inferences on Red Giants in Open Clusters NGC 6791, NGC 6819, and NGC 6811 Using Kepler
A&A 530, A100 (2011) Astronomy DOI: 10.1051/0004-6361/201016303 & c ESO 2011 Astrophysics Asteroseismic inferences on red giants in open clusters NGC 6791, NGC 6819, and NGC 6811 using Kepler S. Hekker1,2, S. Basu3, D. Stello4, T. Kallinger5, F. Grundahl6,S.Mathur7,R.A.García8, B. Mosser9,D.Huber4, T. R. Bedding4,R.Szabó10, J. De Ridder11,W.J.Chaplin2, Y. Elsworth2,S.J.Hale2, J. Christensen-Dalsgaard6 , R. L. Gilliland12, M. Still13, S. McCauliff14, and E. V. Quintana15 1 Astronomical Institute “Anton Pannekoek”, University of Amsterdam, Science Park 904, 1098 XH Amsterdam, The Netherlands e-mail: [email protected] 2 School of Physics and Astronomy, University of Birmingham, Edgbaston, Birmingham B15 2TT, UK 3 Department of Astronomy, Yale University, PO Box 208101, New Haven CT 06520-8101, USA 4 Sydney Institute for Astronomy (SIfA), School of Physics, University of Sydney, NSW 2006, Australia 5 Department of Physics and Astronomy, University of British Colombia, 6224 Agricultural Road, Vancouver, BC V6T 1Z1, Canada 6 Department of Physics and Astronomy, Building 1520, Aarhus University, 8000 Aarhus C, Denmark 7 High Altitude Observatory, NCAR, PO Box 3000, Boulder, CO 80307, USA 8 Laboratoire AIM, CEA/DSM-CNRS, Université Paris 7 Diderot, IRFU/SAp, Centre de Saclay, 91191 Gif-sur-Yvette, France 9 LESIA, UMR8109, Université Pierre et Marie Curie, Université Denis Diderot, Observatoire de Paris, 92195 Meudon Cedex, France 10 Konkoly Observatory of the Hungarian Academy of Sciences, Konkoly Thege Miklós út 15-17, 1121 Budapest, Hungary 11 Instituut voor Sterrenkunde, K.U. Leuven, Celestijnenlaan 200D, 3001 Leuven, Belgium 12 Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA 13 Bay Area Environmental Research Institute/Nasa Ames Research Center, Moffett Field, CA 94035, USA 14 Orbital Sciences Corporation/Nasa Ames Research Center, Moffett Field, CA 94035, USA 15 SETI Institute/Nasa Ames Research Center, Moffett Field, CA 94035, USA Received 13 December 2010 / Accepted 19 April 2011 ABSTRACT Context. -
International Astronomical Union Commission G1 BIBLIOGRAPHY
International Astronomical Union Commission G1 BIBLIOGRAPHY OF CLOSE BINARIES No. 103 Editor-in-Chief: W. Van Hamme Editors: H. Drechsel D.R. Faulkner P.G. Niarchos D. Nogami R.G. Samec C.D. Scarfe C.A. Tout M. Wolf M. Zejda Material published by September 15, 2016 BCB issues are available at the following URLs: http://ad.usno.navy.mil/wds/bsl/G1_bcb_page.html, http://www.konkoly.hu/IAUC42/bcb.html, http://www.sternwarte.uni-erlangen.de/pub/bcb, or 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. -
Characterising Open Clusters in the Solar Neighbourhood with the Tycho-Gaia Astrometric Solution? T
A&A 615, A49 (2018) Astronomy https://doi.org/10.1051/0004-6361/201731251 & © ESO 2018 Astrophysics Characterising open clusters in the solar neighbourhood with the Tycho-Gaia Astrometric Solution? T. Cantat-Gaudin1, A. Vallenari1, R. Sordo1, F. Pensabene1,2, A. Krone-Martins3, A. Moitinho3, C. Jordi4, L. Casamiquela4, L. Balaguer-Núnez4, C. Soubiran5, and N. Brouillet5 1 INAF-Osservatorio Astronomico di Padova, vicolo Osservatorio 5, 35122 Padova, Italy e-mail: [email protected] 2 Dipartimento di Fisica e Astronomia, Università di Padova, vicolo Osservatorio 3, 35122 Padova, Italy 3 SIM, Faculdade de Ciências, Universidade de Lisboa, Ed. C8, Campo Grande, 1749-016 Lisboa, Portugal 4 Institut de Ciències del Cosmos, Universitat de Barcelona (IEEC-UB), Martí i Franquès 1, 08028 Barcelona, Spain 5 Laboratoire d’Astrophysique de Bordeaux, Univ. Bordeaux, CNRS, UMR 5804, 33615 Pessac, France Received 26 May 2017 / Accepted 29 January 2018 ABSTRACT Context. The Tycho-Gaia Astrometric Solution (TGAS) subset of the first Gaia catalogue contains an unprecedented sample of proper motions and parallaxes for two million stars brighter than G 12 mag. Aims. We take advantage of the full astrometric solution available∼ for those stars to identify the members of known open clusters and compute mean cluster parameters using either TGAS or the fourth U.S. Naval Observatory CCD Astrograph Catalog (UCAC4) proper motions, and TGAS parallaxes. Methods. We apply an unsupervised membership assignment procedure to select high probability cluster members, we use a Bayesian/Markov Chain Monte Carlo technique to fit stellar isochrones to the observed 2MASS JHKS magnitudes of the member stars and derive cluster parameters (age, metallicity, extinction, distance modulus), and we combine TGAS data with spectroscopic radial velocities to compute full Galactic orbits. -
How the Tidal Evolution of Hot J Upiters Affects Transit Surveys of Clusters
Too Little, Too Late: How the Tidal Evolution of Hot J upiters affects Transit Surveys of Clusters 1 John H. Debes1,2, Brian Jackson ,2 ABSTRACT The tidal evolution of hot Jupiters may change the efficiency of transit surveys of stellar clusters. The orbital decay that hot Jupiters suffer may result in their destruction, leaving fewer transiting planets in older clusters. vVe calculate the impact tidal evolution has for different assumed stellar populations, including that of 47 Tuc, a globular cluster that was the focus of an intense HST search for transits. vVe find that in older clusters one expects to detect fewer transiting planets by a factor of two for surveys sensitive to Jupiter-like planets in orbits out to 0.5 AU, and up to a factor of 25 for surveys sensitive to Jupiter-like planets in orbits out to 0.08 AU. Additionally, tidal evolution affects the distribution of transiting planets as a function of semi-major axis, producing larger orbital period gaps for transiting planets as the age of the cluster increases. Tidal evolution can explain the lack of detected exoplanets in 47 Tuc without invoking other mechanisms. Four open clusters residing within the Kepler fields of view have ages that span 0.4-8 Gyr~if Kepler can observe a significant number of planets in these clusters, it will provide key tests for our tidal evolution hypothesis. Finally, our results suggest that observers wishing to discover transiting planets in clusters must have sufficient accuracy to detect lower mass planets, search larger numbers of cluster members, or have longer observation \\'indows to be confident that a significant number of transits will occur for a population of stars. -
Kepler Asteroseismology Program: Introduction and First Results RONALD L
PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF THE PACIFIC, 122:131–143, 2010 February © 2010. The Astronomical Society of the Pacific. All rights reserved. Printed in U.S.A. Kepler Asteroseismology Program: Introduction and First Results RONALD L. GILLILAND,1 TIMOTHY M. BROWN,2 JØRGEN CHRISTENSEN-DALSGAARD,3 HANS KJELDSEN,3 CONNY AERTS,4 THIERRY APPOURCHAUX,5 SARBANI BASU,6 TIMOTHY R. BEDDING,7 WILLIAM J. CHAPLIN,8 MARGARIDA S. CUNHA,9 PETER DE CAT,10 JORIS DE RIDDER,4 JOYCE A. GUZIK,11 GERALD HANDLER,12 STEVEN KAWALER,13 LÁSZLÓ KISS,7,14 KATRIEN KOLENBERG,12 DONALD W. KURTZ,15 TRAVIS S. METCALFE,16 MARIO J. P. F. G. MONTEIRO,9 ROBERT SZABÓ,14 TORBEN ARENTOFT,3 LUIS BALONA,17 JONAS DEBOSSCHER,4 YVONNE P. ELSWORTH,8 PIERRE-OLIVIER QUIRION,3,18 DENNIS STELLO,7 JUAN CARLOS SUÁREZ,19 WILLIAM J. BORUCKI,20 JON M. JENKINS,21 DAVID KOCH,20 YOJI KONDO,22 DAVID W. LATHAM,23 JASON F. ROWE,20 AND JASON H. STEFFEN24 Received 2009 November 23; accepted 2009 December 1; published 2010 January 14 ABSTRACT. Asteroseismology involves probing the interiors of stars and quantifying their global properties, such as radius and age, through observations of normal modes of oscillation. The technical requirements for conducting asteroseismology include ultrahigh precision measured in photometry in parts per million, as well as nearly continuous time series over weeks to years, and cadences rapidenough to sample oscillations with periods as short as afew minutes. We report on results from the first 43 days of observations, in which the unique capabilities of Kepler in providing a revolutionary advance in asteroseismology are already well in evidence. -
Boston University Institute for Astrophysical Research 2014-‐15 Bi
Boston University Institute for Astrophysical Research Stunning image of the spiral galaxy NGC891, which we Earthlings view edge-on, obtained with the Discovery Channel Telescope by Professor Elizabeth Blanton and her AS710 class. The dark dust lane is clearly visible, as is a collection of hot gas clouds (bright yellow spots) near the center. The galaxy lies at a distance of about 30 million light-years. 2014-15 Bi-Annual Report Period Covered: July 1, 2013 – June 30, 2015 Overview Introduction The mission of the Institute for Astrophysical Research (IAR) is to promote and facilitate research and education in astrophysics at Boston University. The IAR accomplishes this mission by administering research grants, enhancing the visibility of IAR members with funding agencies, coordinating the use of Boston University astrophysics facilities, promoting the design, development, and operation of Boston University instruments and telescopes, sponsoring regular seminars and occasional professional meetings, and actively engaging students of all levels in research. The primary research fields in which IAR astronomers are involved include blazars and other active nuclei of galaxies, clusters of galaxies, the formation of stars, the gaseous and ionized interstellar medium, the physical properties, evolution, and magnetic activity of stars, extrasolar planets, planet-forming disks around young stars, magnetic fields, high-energy phenomena, dark matter, and the large-scale structure of the universe. Executive Summary FY14 – FY 15 marked highly successful 16th & 17th years in the IAR’s mission to foster research in astrophysics at Boston University. The scientific productivity of IAR astronomers remained at a high level over these two years, resulting in the publication of 104 scientific papers in the peer-reviewed literature and garnering significant interest in the popular media. -
Kepler Mission Design, Realized Photometric Performance, and Early Science
The Astrophysical Journal Letters, 713:L79–L86, 2010 April 20 doi:10.1088/2041-8205/713/2/L79 C 2010. The American Astronomical Society. All rights reserved. Printed in the U.S.A. KEPLER MISSION DESIGN, REALIZED PHOTOMETRIC PERFORMANCE, AND EARLY SCIENCE David G. Koch1, William J. Borucki1, Gibor Basri2, Natalie M. Batalha3, Timothy M. Brown4, Douglas Caldwell5, Jørgen Christensen-Dalsgaard6, William D. Cochran7, Edna DeVore5, Edward W. Dunham8, Thomas N. Gautier III9, John C. Geary10, Ronald L. Gilliland11, Alan Gould12,JonJenkins5, Yoji Kondo13, David W. Latham10, Jack J. Lissauer1, Geoffrey Marcy2, David Monet14, Dimitar Sasselov10, Alan Boss15, Donald Brownlee16, John Caldwell17, Andrea K. Dupree10, Steve B. Howell18, Hans Kjeldsen6, Søren Meibom10, David Morrison1, Tobias Owen19, Harold Reitsema20, Jill Tarter5, Stephen T. Bryson1, Jessie L. Dotson1, Paul Gazis5, Michael R. Haas1, Jeffrey Kolodziejczak21, Jason F. Rowe1,23, Jeffrey E. Van Cleve5, Christopher Allen22, Hema Chandrasekaran5, Bruce D. Clarke5,JieLi5, Elisa V. Quintana5, Peter Tenenbaum5, Joseph D. Twicken5, and Hayley Wu5 1 NASA Ames Research Center, Moffett Field, CA 94035, USA; [email protected] 2 Department of Astronomy, University of California-Berkeley, Berkeley, CA 94720, USA 3 Department of Physics and Astronomy, San Jose State University, San Jose, CA 95192, USA 4 Las Cumbres Observatory Global Telescope, Goleta, CA 93117, USA 5 SETI Institute, NASA Ames Research Center, Moffett Field, CA 94035, USA 6 Aarhus University, DK-8000, Aarhus C, Denmark 7 McDonald Observatory, -
And K-Band Spectra of Kepler M Dwarf Planet-Candidate Hosts
The Astrophysical Journal Supplement Series, 213:5 (12pp), 2014 July doi:10.1088/0067-0049/213/1/5 C 2014. The American Astronomical Society. All rights reserved. Printed in the U.S.A. CHARACTERIZING THE COOL KOIs. VI. H- AND K-BAND SPECTRA OF KEPLER M DWARF PLANET-CANDIDATE HOSTS Philip S. Muirhead1,11, Juliette Becker2, Gregory A. Feiden3,Barbara´ Rojas-Ayala4, Andrew Vanderburg5, Ellen M. Price2, Rachel Thorp2, Nicholas M. Law6, Reed Riddle2, Christoph Baranec7, Katherine Hamren8, Everett Schlawin9, Kevin R. Covey10, John Asher Johnson5, and James P. Lloyd9 1 Department of Astronomy, Boston University, 725 Commonwealth Avenue, Boston, MA 02215, USA; [email protected] 2 California Institute of Technology, 1200 East California Boulevard, Pasadena, CA 91125, USA 3 Department of Physics and Astronomy, Uppsala University, Box 516, SE-75120 Uppsala, Sweden 4 Centro de Astrof´ısica da Universidade do Porto, Rua das Estrelas, 4150-762 Oporto, Portugal 5 Harvard College Observatory, 60 Garden Street, Cambridge, MA 02138, USA 6 Department of Physics and Astronomy, University of North Carolina at Chapel Hill, Chapel Hill, NC 27599-3255, USA 7 Institute for Astronomy, University of Hawai‘i at Manoa,¯ Hilo, HI 96720-2700, USA 8 Department of Astronomy and Astrophysics, University of California, Santa Cruz, CA 95064, USA 9 Department of Astronomy, Cornell University, Ithaca, NY 14583, USA 10 Lowell Observatory, 1400 W Mars Hill Road, Flagstaff, AZ 86001, USA Received 2014 February 9; accepted 2014 May 5; published 2014 June 18 ABSTRACT We present H- and K-band spectra for late-type Kepler Objects of Interest (the “Cool KOIs”): low-mass stars with transiting-planet candidates discovered by NASA’s Kepler Mission that are listed on the NASA Exoplanet Archive.