Divinus Lux Observatory Bulletin: Report #5
Total Page:16
File Type:pdf, Size:1020Kb
Load more
Recommended publications
-
Download This Article in PDF Format
A&A 583, A85 (2015) Astronomy DOI: 10.1051/0004-6361/201526795 & c ESO 2015 Astrophysics Reaching the boundary between stellar kinematic groups and very wide binaries III. Sixteen new stars and eight new wide systems in the β Pictoris moving group F. J. Alonso-Floriano1, J. A. Caballero2, M. Cortés-Contreras1,E.Solano2,3, and D. Montes1 1 Departamento de Astrofísica y Ciencias de la Atmósfera, Facultad de Ciencias Físicas, Universidad Complutense de Madrid, 28040 Madrid, Spain e-mail: [email protected] 2 Centro de Astrobiología (CSIC-INTA), ESAC PO box 78, 28691 Villanueva de la Cañada, Madrid, Spain 3 Spanish Virtual Observatory, ESAC PO box 78, 28691 Villanueva de la Cañada, Madrid, Spain Received 19 June 2015 / Accepted 8 August 2015 ABSTRACT Aims. We look for common proper motion companions to stars of the nearby young β Pictoris moving group. Methods. First, we compiled a list of 185 β Pictoris members and candidate members from 35 representative works. Next, we used the Aladin and STILTS virtual observatory tools and the PPMXL proper motion and Washington Double Star catalogues to look for companion candidates. The resulting potential companions were subjects of a dedicated astro-photometric follow-up using public data from all-sky surveys. After discarding 67 sources by proper motion and 31 by colour-magnitude diagrams, we obtained a final list of 36 common proper motion systems. The binding energy of two of them is perhaps too small to be considered physically bound. Results. Of the 36 pairs and multiple systems, eight are new, 16 have only one stellar component previously classified as a β Pictoris member, and three have secondaries at or below the hydrogen-burning limit. -
Arxiv:2010.13762V1 [Astro-Ph.EP] 26 Oct 2020
Draft version October 27, 2020 Typeset using LATEX default style in AASTeX63 A Framework for Relative Biosignature Yields from Future Direct Imaging Missions Noah W. Tuchow 1 and Jason T. Wright 1 1Department of Astronomy & Astrophysics and Center for Exoplanets and Habitable Worlds and Penn State Extraterrestrial Intelligence Center 525 Davey Laboratory The Pennsylvania State University University Park, PA, 16802, USA ABSTRACT Future exoplanet direct imaging missions, such as HabEx and LUVOIR, will select target stars to maximize the number of Earth-like exoplanets that can have their atmospheric compositions charac- terized. Because one of these missions' aims is to detect biosignatures, they should also consider the expected biosignature yield of planets around these stars. In this work, we develop a method of computing relative biosignature yields among potential target stars, given a model of habitability and biosignature genesis, and using a star's habitability history. As an illustration and first application of this method, we use MESA stellar models to calculate the time evolution of the habitable zone, and examine three simple models for biosignature genesis to calculate the relative biosignature yield for different stars. We find that the relative merits of K stars versus F stars depend sensitively on model choice. In particular, use of the present-day habitable zone as a proxy for biosignature detectability favors young, luminous stars lacking the potential for long-term habitability. Biosignature yields are also sensitive to whether life can arise on Cold Start exoplanets that enter the habitable zone after formation, an open question deserving of more attention. Using the case study of biosignature yields calculated for θ Cygni and 55 Cancri, we find that robust mission design and target selection for HabEx and LUVOIR depends on: choosing a specific model of biosignature appearance with time; the terrestrial planet occurrence rate as a function of orbital separation; precise knowledge of stellar properties; and accurate stellar evolutionary histories. -
An October 2003 Amateur Observation of HD 209458B
Tsunami 3-2004 A Shadow over Oxie Anders Nyholm A shadow over Oxie – An October 2003 amateur observation of HD 209458b Anders Nyholm Rymdgymnasiet Kiruna, Sweden April 2004 Tsunami 3-2004 A Shadow over Oxie Anders Nyholm Abstract This paper describes a photometry observation by an amateur astronomer of a transit of the extrasolar planet HD 209458b across its star on the 26th of October 2003. A description of the telescope, CCD imager, software and method used is provided. The preparations leading to the transit observation are described, along with a chronology. The results of the observation (in the form of a time-magnitude diagram) is reproduced, investigated and discussed. It is concluded that the HD 209458b transit most probably was observed. A number of less successful attempts at observing HD 209458b transits in August and October 2003 are also described. A general introduction describes the development in astronomy leading to observations of extrasolar planets in general and amateur observations of extrasolar planets in particular. Tsunami 3-2004 A Shadow over Oxie Anders Nyholm Contents 1. Introduction 3 2. Background 3 2.1 Transit pre-history: Mercury and Venus 3 2.2 Extrasolar planets: a brief history 4 2.3 Early photometry proposals 6 2.4 HD 209458b: discovery and study 6 2.5 Stellar characteristics of HD 209458 6 2.6 Characteristics of HD 209458b 7 3. Observations 7 3.1 Observatory, equipment and software 7 3.2 Test observation of SAO 42275 on the 14th of April 2003 7 3.3 Selection of candidate transits 7 3.4 Test observation and transit observation attempts in August 2003 8 3.5 Transit observation attempt on the 12th of October 2003 8 3.6 Transit observation attempt on the 26th of October 2003 8 4. -
Gaia Data Release 2 Special Issue
A&A 623, A110 (2019) Astronomy https://doi.org/10.1051/0004-6361/201833304 & © ESO 2019 Astrophysics Gaia Data Release 2 Special issue Gaia Data Release 2 Variable stars in the colour-absolute magnitude diagram?,?? Gaia Collaboration, L. Eyer1, L. Rimoldini2, M. Audard1, R. I. Anderson3,1, K. Nienartowicz2, F. Glass1, O. Marchal4, M. Grenon1, N. Mowlavi1, B. Holl1, G. Clementini5, C. Aerts6,7, T. Mazeh8, D. W. Evans9, L. Szabados10, A. G. A. Brown11, A. Vallenari12, T. Prusti13, J. H. J. de Bruijne13, C. Babusiaux4,14, C. A. L. Bailer-Jones15, M. Biermann16, F. Jansen17, C. Jordi18, S. A. Klioner19, U. Lammers20, L. Lindegren21, X. Luri18, F. Mignard22, C. Panem23, D. Pourbaix24,25, S. Randich26, P. Sartoretti4, H. I. Siddiqui27, C. Soubiran28, F. van Leeuwen9, N. A. Walton9, F. Arenou4, U. Bastian16, M. Cropper29, R. Drimmel30, D. Katz4, M. G. Lattanzi30, J. Bakker20, C. Cacciari5, J. Castañeda18, L. Chaoul23, N. Cheek31, F. De Angeli9, C. Fabricius18, R. Guerra20, E. Masana18, R. Messineo32, P. Panuzzo4, J. Portell18, M. Riello9, G. M. Seabroke29, P. Tanga22, F. Thévenin22, G. Gracia-Abril33,16, G. Comoretto27, M. Garcia-Reinaldos20, D. Teyssier27, M. Altmann16,34, R. Andrae15, I. Bellas-Velidis35, K. Benson29, J. Berthier36, R. Blomme37, P. Burgess9, G. Busso9, B. Carry22,36, A. Cellino30, M. Clotet18, O. Creevey22, M. Davidson38, J. De Ridder6, L. Delchambre39, A. Dell’Oro26, C. Ducourant28, J. Fernández-Hernández40, M. Fouesneau15, Y. Frémat37, L. Galluccio22, M. García-Torres41, J. González-Núñez31,42, J. J. González-Vidal18, E. Gosset39,25, L. P. Guy2,43, J.-L. Halbwachs44, N. C. Hambly38, D. -
The Evening Sky Map
I N E D R I A C A S T N E O D I T A C L E O R N I G D S T S H A E P H M O O R C I . Z N O p l f e i n h d o P t O o N ) l h a r g Z i u s , o I l C t P h R I r e o R N ( O o r C r H e t L p h p E E i s t D H a ( r g T F i . O B NORTH D R e N M h t E A X O e s A H U M C T . I P N S L E E P Z “ E A N H O NORTHERN HEMISPHERE M T R T Y N H E ” K E η ) W S . T T E W U B R N W D E T T W T H h A The Evening Sky Map e MAY 2021 E . C ) Cluster O N FREE* EACH MONTH FOR YOU TO EXPLORE, LEARN & ENJOY THE NIGHT SKY r S L a o K e Double r Y E t B h R M t e PERSEUS A a A r CASSIOPEIA n e S SKY MAP SHOWS HOW Get Sky Calendar on Twitter P δ r T C G C A CEPHEUS r E o R e J s O h Sky Calendar – May 2021 http://twitter.com/skymaps M39 s B THE NIGHT SKY LOOKS T U ( O i N s r L D o a j A NE I I a μ p T EARLY MAY PM T 10 r 61 M S o S 3 Last Quarter Moon at 19:51 UT. -
1949 Celebrating 65 Years of Bringing Astronomy to North Texas 2014
1949 Celebrating 65 Years of Bringing Astronomy to North Texas 2014 Contact information: Inside this issue: Info Officer (General Info)– [email protected]@fortworthastro.com Website Administrator – [email protected] Postal Address: Page Fort Worth Astronomical Society July Club Calendar 3 3812 Fenton Avenue Fort Worth, TX 76133 Celestial Events 4 Web Site: http://www.fortworthastro.org Facebook: http://tinyurl.com/3eutb22 Sky Chart 5 Twitter: http://twitter.com/ftwastro Yahoo! eGroup (members only): http://tinyurl.com/7qu5vkn Moon Phase Calendar 6 Officers (2014-2015): Mecury/Venus Data Sheet 7 President – Bruce Cowles, [email protected] Vice President – Russ Boatwright, [email protected] Young Astronomer News 8 Sec/Tres – Michelle Theisen, [email protected] Board Members: Cloudy Night Library 9 2014-2016 The Astrolabe 10 Mike Langohr Tree Oppermann AL Obs Club of the Month 14 2013-2015 Bill Nichols Constellation of the Month 15 Jim Craft Constellation Mythology 19 Cover Photo This is an HaLRGB image of M8 & Prior Club Meeting Minutes 23 M20, composed entirely from a T3i General Club Information 24 stack of one shot color. Collected the data over a period of two nights. That’s A Fact 24 Taken by FWAS member Jerry Keith November’s Full Moon 24 Observing Site Reminders: Be careful with fire, mind all local burn bans! FWAS Foto Files 25 Dark Site Usage Requirements (ALL MEMBERS): Maintain Dark-Sky Etiquettehttp://tinyurl.com/75hjajy ( ) Turn out your headlights at the gate! Sign -
Tabetha Boyajian's CV
Dr. Tabetha Boyajian Yale University, Department of Astronomy, 52 Hillhouse Ave., New Haven, CT 06520 USA [email protected] • +1 (404) 849-4848 • http://www.astro.yale.edu/tabetha PROFESSIONAL Yale University, Department of Astronomy, New Haven, Connecticut, USA EXPERIENCE Postdoctoral Fellow 2012 – present • Supervisor: Dr. Debra Fischer Center for high Angular Resolution Astronomy (CHARA), Georgia State University Hubble Fellow 2009 – 2012 • Supervisor: Dr. Harold McAlister EDUCATION Georgia State University, Department of Physics and Astronomy, Atlanta, Georgia, USA Doctor of Philosophy (Ph.D.) in Astronomy 2005 – 2009 • Adviser: Dr. Harold McAlister Master of Science (M.S.) in Physics 2003 – 2005 • Adviser: Dr. Douglas Gies College of Charleston, Charleston, South Carolina, USA Bachelor of Science (B.S.) in Physics with concentration in astronomy 1998 – 2003 • Graduated with Departmental Honors PROFESSIONAL Secretary, International Astronomical Union, Division G 2015 – 2018 SERVICE Steering Committee, International Astronomical Union, Division G 2015 – 2018 Review panel member NASA Kepler Guest Observer program, NASA K2 Guest Observer program, NSF-AAG program Referee The Astronomical Journal, Astronomy & Astrophysics, PASA Telescope time allocation committee member CHARA, OPTICON (external) AREAS OF Fundamental properties of stars: diameters, temperatures, exoplanet detection and characterization, SPECIALIZATION Optical/IR interferometry, stellar spectroscopy (radial velocities, abundances, activity), absolute AND INTEREST -
The Observer's Handbook for 1954
THE OBSERVER’S HANDBOOK FOR 1954 PUBLISHED BY The Royal Astronomical Society of Canada C. A. CHANT, E ditor RUTH J. NORTHCOTT, A s s is t a n t E ditor DAVID DUNLAP OBSERVATORY FORTY-SIXTH YEAR OF PUBLICATION P rice 50 C e n t s TORONTO 15 Ross S t r e e t P r i n t e d f o r t h e S o c i e t y B y t h e U n i v e r s i t y o f T o r o n t o P r e s s THE ROYAL ASTRONOMICAL SOCIETY OF CANADA The Society was incorporated in 1890 as The Astronomical and Physical Society of Toronto, assuming its present name in 1903. For many years the Toronto organization existed alone, but now the Society is national in extent, having active Centres in Montreal and Quebec, P.Q.; Ottawa, Toronto, Hamilton, London, and Windsor, Ontario; Winnipeg, Man.; Saskatoon, Sask.; Edmonton, Alta.; Vancouver and Victoria, B.C. As well as nearly 1000 members of these Canadian Centres, there are nearly 400 members not attached to any Centre, mostly resident in other nations, while some 200 additional institutions or persons are on the regular mailing list of our publications. The Society publishes a bi-monthly Jo urnal and a yearly O bserver’s H andboo k. Single copies of the Jo urnal are 50 cents, and of the H andbook, 50 cents. Membership is open to anyone interested in astronomy. Annual dues, $3.00; life membership, $40.00. -
The Hercules Stream As Seen by APOGEE-2 South
MNRAS 474, 95–101 (2018) doi:10.1093/mnras/stx2777 The Hercules stream as seen by APOGEE-2 South Jason A. S. Hunt,1‹ Jo Bovy,1,2† Angeles Perez-Villegas,´ 3 Jon A. Holtzman,4 Jennifer Sobeck,5 Drew Chojnowski,4 Felipe A. Santana,6 Pedro A. Palicio,7,8 Christopher Wegg,3 Ortwin Gerhard,3 Andres´ Almeida,9 Dmitry Bizyaev,10,11 Jose G. Fernandez-Trincado,12,13 Richard R. Lane,14 Penelope´ Longa-Pena,˜ 15 Steven R. Majewski,16 Kaike Pan10 and Alexandre Roman-Lopes17 1Dunlap Institute for Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada 2Department of Astronomy and Astrophysics, University of Toronto, 50 St. George Street, Toronto, ON M5S 3H4, Canada 3Max-Plank Institut fur¨ Extraterrestrische Physik, Gießenbachstraße, D-85741 Garching, Germany 4Department of Physics and Astronomy, New Mexico State University, Las Cruces, NM 88003-8001, USA 5Department of Astronomy, Box 351580, University of Washington, Seattle, WA 98195, USA 6Departamento de Astronom´ıa, Universidad de Chile, Av. Libertador Bernardo O’Higgins 1058, Santiago de Chile, Chile 7Instituto de Astrof´ısica de Canarias, E-38205 La Laguna, Tenerife, Spain 8Dpto. Astrof´ısica, Universidad de La Laguna, E-38206 La Laguna, Tenerife, Spain 9Instituto de Investigacion´ Multidisciplinario en Ciencia y Tecnolog´ıa, Universidad de La Serena, Benavente 980, La Serena, Chile 10Apache Point Observatory and New Mexico State University, PO Box 59, Sunspot, NM 88349-0059, USA 11Sternberg Astronomical Institute, Moscow State University, 119992 Moscow, Russia 12Departamento de Astronom´ıa, Universidad de Concepcion,´ Casilla 160-C, Concepcion,´ Chile 13Institut Utinam, CNRS UMR6213, Univ. -
Ioptron CEM70 Center-Balanced Equatorial Mount
iOptron® CEM70 Center-Balanced Equatorial Mount Instruction Manual Product CEM70(#C70A), CEM70G(#C70AG) and CEM70EC(#C704A0) Please read the included CEM70 Quick Setup Guide (QSG) BEFORE taking the mount out of the case! This product is a precision instrument. Please read the included QSG before assembling the mount. Please read the entire Instruction Manual before operating the mount. You must hold the mount firmly when disengaging the gear switches. Otherwise personal injury and/or equipment damage may occur. Any worm system damage due to improper operation will not be covered by iOptron’s limited warranty. If you have any questions please contact us at [email protected] WARNING! NEVER USE A TELESCOPE TO LOOK AT THE SUN WITHOUT A PROPER FILTER! Looking at or near the Sun will cause instant and irreversible damage to your eye. Children should always have adult supervision while using a telescope. 2 Table of Contents Table of Contents ........................................................................................................................................ 3 1. CEM70 Introduction ................................................................................................................................ 5 2. CEM70 Terms ......................................................................................................................................... 6 2.1. Parts List ........................................................................................................................................... 6 2.2. -
Prime Focus (05-18)
Highlights of the May Sky - - - 2nd - - - DUSK: Aldebaran and Venus, separated by about 6°, set together in the west-northwest. - - - 4th - - - AM: A waning gibbous Moon, Saturn, and Lambda Sagittarii (top star of the Teapot asterism in Sagittarius) form a triangle. - - - 7th - - - KAS Last Quarter Moon 10:09 pm EDT General Meeting: Friday, May 4 @ 7:00 pm - - - 8th - - - Jupiter is at opposition. Kalamazoo Area Math & Science Center - See Page 4 for Details - - - 15th - - - New Moon Observing Session: Saturday, May 5 @ 9:00 pm 7:48 am EDT Venus, Jupiter & Spring Galaxies - Kalamazoo Nature Center - - - 17th - - - DUSK: Only 6° separate a thin Observing Session: Saturday, May 19 @ 9:00 pm crescent Moon and Venus. Moon, Venus & Jupiter - Kalamazoo Nature Center - - - 19th - - - PM: The Moon is 6° below the Board Meeting: Sunday, May 20 @ 5:00 pm Beehive Cluster (M44). Sunnyside Church - 2800 Gull Road - All Members Welcome - - - 20th - - - DUSK: Venus is less than 1° right of the open cluster M35 in Gemini. - - - 21st - - - Inside the Newsletter. PM: The Moon and Regulus are less than 1° apart. April Meeng Minutes....................... p. 2 First Quarter Moon 11:49 pm EDT Board Meeng Minutes..................... p. 2 - - - 25th - - - Observaons...................................... p. 3 PM: Spica, in Virgo, and a waxing gibbous Moon are only NASA Space Place.............................. p. 3 6° apart. General Meeng Preview.................. p. 4 - - - 26th - - - PM: The Moon, Jupiter, and Counng Stars.................................... p. 5 Spica form a long triangle. The King of Spring.............................. p. 6 - - - 29th - - - May Night Sky.................................... p. 12 Full Moon 10:20 am EDT KAS Board & Announcements............ p. 13 - - - 31st - - - Miller Planisphere............................. -
Extrasolar Planets and Their Host Stars
Kaspar von Braun & Tabetha S. Boyajian Extrasolar Planets and Their Host Stars July 25, 2017 arXiv:1707.07405v1 [astro-ph.EP] 24 Jul 2017 Springer Preface In astronomy or indeed any collaborative environment, it pays to figure out with whom one can work well. From existing projects or simply conversations, research ideas appear, are developed, take shape, sometimes take a detour into some un- expected directions, often need to be refocused, are sometimes divided up and/or distributed among collaborators, and are (hopefully) published. After a number of these cycles repeat, something bigger may be born, all of which one then tries to simultaneously fit into one’s head for what feels like a challenging amount of time. That was certainly the case a long time ago when writing a PhD dissertation. Since then, there have been postdoctoral fellowships and appointments, permanent and adjunct positions, and former, current, and future collaborators. And yet, con- versations spawn research ideas, which take many different turns and may divide up into a multitude of approaches or related or perhaps unrelated subjects. Again, one had better figure out with whom one likes to work. And again, in the process of writing this Brief, one needs create something bigger by focusing the relevant pieces of work into one (hopefully) coherent manuscript. It is an honor, a privi- lege, an amazing experience, and simply a lot of fun to be and have been working with all the people who have had an influence on our work and thereby on this book. To quote the late and great Jim Croce: ”If you dig it, do it.