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Variable Star Section Circular
British Astronomical Association Variable Star Section Circular No 82, December 1994 CONTENTS A New Director 1 Credit for Observations 1 Submission of 1994 Observations 1 Chart Problems 1 Recent Novae Named 1 Z Ursae Minoris - A New R CrB Star? 2 The February 1995 Eclipse of 0¼ Geminorum 2 Computerisation News - Dave McAdam 3 'Stella Haitland, or Love and the Stars' - Philip Hurst 4 The 1994 Outburst of UZ Bootis - Gary Poyner 5 Observations of Betelgeuse by the SPA-VSS - Tony Markham 6 The AAVSO and the Contribution of Amateurs to VS Research Suspected Variables - Colin Henshaw 8 From the Literature 9 Eclipsing Binary Predictions 11 Summaries of IBVS's Nos 4040 to 4092 14 The BAA Instruments and Imaging Section Newsletter 16 Light-curves (TZ Per, R CrB, SV Sge, SU Tau, AC Her) - Dave McAdam 17 ISSN 0267-9272 Office: Burlington House, Piccadilly, London, W1V 9AG Section Officers Director Tristram Brelstaff, 3 Malvern Court, Addington Road, READING, Berks, RG1 5PL Tel: 0734-268981 Section Melvyn D Taylor, 17 Cross Lane, WAKEFIELD, Secretary West Yorks, WF2 8DA Tel: 0924-374651 Chart John Toone, Hillside View, 17 Ashdale Road, Cressage, Secretary SHREWSBURY, SY5 6DT Tel: 0952-510794 Computer Dave McAdam, 33 Wrekin View, Madeley, TELFORD, Secretary Shropshire, TF7 5HZ Tel: 0952-432048 E-mail: COMPUSERV 73671,3205 Nova/Supernova Guy M Hurst, 16 Westminster Close, Kempshott Rise, Secretary BASINGSTOKE, Hants, RG22 4PP Tel & Fax: 0256-471074 E-mail: [email protected] [email protected] Pro-Am Liaison Roger D Pickard, 28 Appletons, HADLOW, Kent TN11 0DT Committee Tel: 0732-850663 Secretary E-mail: [email protected] KENVAD::RDP Eclipsing Binary See Director Secretary Circulars Editor See Director Telephone Alert Numbers Nova and First phone Nova/Supernova Secretary. -
Astrometry and Optics During the Past 2000 Years
1 Astrometry and optics during the past 2000 years Erik Høg Niels Bohr Institute, Copenhagen, Denmark 2011.05.03: Collection of reports from November 2008 ABSTRACT: The satellite missions Hipparcos and Gaia by the European Space Agency will together bring a decrease of astrometric errors by a factor 10000, four orders of magnitude, more than was achieved during the preceding 500 years. This modern development of astrometry was at first obtained by photoelectric astrometry. An experiment with this technique in 1925 led to the Hipparcos satellite mission in the years 1989-93 as described in the following reports Nos. 1 and 10. The report No. 11 is about the subsequent period of space astrometry with CCDs in a scanning satellite. This period began in 1992 with my proposal of a mission called Roemer, which led to the Gaia mission due for launch in 2013. My contributions to the history of astrometry and optics are based on 50 years of work in the field of astrometry but the reports cover spans of time within the past 2000 years, e.g., 400 years of astrometry, 650 years of optics, and the “miraculous” approval of the Hipparcos satellite mission during a few months of 1980. 2011.05.03: Collection of reports from November 2008. The following contains overview with summary and link to the reports Nos. 1-9 from 2008 and Nos. 10-13 from 2011. The reports are collected in two big file, see details on p.8. CONTENTS of Nos. 1-9 from 2008 No. Title Overview with links to all reports 2 1 Bengt Strömgren and modern astrometry: 5 Development of photoelectric astrometry including the Hipparcos mission 1A Bengt Strömgren and modern astrometry .. -
Thesis, Anton Pannekoek Institute, Universiteit Van Amsterdam
UvA-DARE (Digital Academic Repository) The peculiar climates of ultra-hot Jupiters Arcangeli, J. Publication date 2020 Document Version Final published version License Other Link to publication Citation for published version (APA): Arcangeli, J. (2020). The peculiar climates of ultra-hot Jupiters. General rights It is not permitted to download or to forward/distribute the text or part of it without the consent of the author(s) and/or copyright holder(s), other than for strictly personal, individual use, unless the work is under an open content license (like Creative Commons). Disclaimer/Complaints regulations If you believe that digital publication of certain material infringes any of your rights or (privacy) interests, please let the Library know, stating your reasons. In case of a legitimate complaint, the Library will make the material inaccessible and/or remove it from the website. Please Ask the Library: https://uba.uva.nl/en/contact, or a letter to: Library of the University of Amsterdam, Secretariat, Singel 425, 1012 WP Amsterdam, The Netherlands. You will be contacted as soon as possible. UvA-DARE is a service provided by the library of the University of Amsterdam (https://dare.uva.nl) Download date:09 Oct 2021 Jacob Arcangeli of Ultra-hot Jupiters The peculiar climates The peculiar climates of Ultra-hot Jupiters Jacob Arcangeli The peculiar climates of Ultra-hot Jupiters Jacob Arcangeli © 2020, Jacob Arcangeli Contact: [email protected] The peculiar climates of Ultra-hot Jupiters Thesis, Anton Pannekoek Institute, Universiteit van Amsterdam Cover by Imogen Arcangeli ([email protected]) Printed by Amsterdam University Press ANTON PANNEKOEK INSTITUTE The research included in this thesis was carried out at the Anton Pannekoek Institute for Astronomy (API) of the University of Amsterdam. -
Abstracts of Extreme Solar Systems 4 (Reykjavik, Iceland)
Abstracts of Extreme Solar Systems 4 (Reykjavik, Iceland) American Astronomical Society August, 2019 100 — New Discoveries scope (JWST), as well as other large ground-based and space-based telescopes coming online in the next 100.01 — Review of TESS’s First Year Survey and two decades. Future Plans The status of the TESS mission as it completes its first year of survey operations in July 2019 will bere- George Ricker1 viewed. The opportunities enabled by TESS’s unique 1 Kavli Institute, MIT (Cambridge, Massachusetts, United States) lunar-resonant orbit for an extended mission lasting more than a decade will also be presented. Successfully launched in April 2018, NASA’s Tran- siting Exoplanet Survey Satellite (TESS) is well on its way to discovering thousands of exoplanets in orbit 100.02 — The Gemini Planet Imager Exoplanet Sur- around the brightest stars in the sky. During its ini- vey: Giant Planet and Brown Dwarf Demographics tial two-year survey mission, TESS will monitor more from 10-100 AU than 200,000 bright stars in the solar neighborhood at Eric Nielsen1; Robert De Rosa1; Bruce Macintosh1; a two minute cadence for drops in brightness caused Jason Wang2; Jean-Baptiste Ruffio1; Eugene Chiang3; by planetary transits. This first-ever spaceborne all- Mark Marley4; Didier Saumon5; Dmitry Savransky6; sky transit survey is identifying planets ranging in Daniel Fabrycky7; Quinn Konopacky8; Jennifer size from Earth-sized to gas giants, orbiting a wide Patience9; Vanessa Bailey10 variety of host stars, from cool M dwarfs to hot O/B 1 KIPAC, Stanford University (Stanford, California, United States) giants. 2 Jet Propulsion Laboratory, California Institute of Technology TESS stars are typically 30–100 times brighter than (Pasadena, California, United States) those surveyed by the Kepler satellite; thus, TESS 3 Astronomy, California Institute of Technology (Pasadena, Califor- planets are proving far easier to characterize with nia, United States) follow-up observations than those from prior mis- 4 Astronomy, U.C. -
Astronomy Magazine 2011 Index Subject Index
Astronomy Magazine 2011 Index Subject Index A AAVSO (American Association of Variable Star Observers), 6:18, 44–47, 7:58, 10:11 Abell 35 (Sharpless 2-313) (planetary nebula), 10:70 Abell 85 (supernova remnant), 8:70 Abell 1656 (Coma galaxy cluster), 11:56 Abell 1689 (galaxy cluster), 3:23 Abell 2218 (galaxy cluster), 11:68 Abell 2744 (Pandora's Cluster) (galaxy cluster), 10:20 Abell catalog planetary nebulae, 6:50–53 Acheron Fossae (feature on Mars), 11:36 Adirondack Astronomy Retreat, 5:16 Adobe Photoshop software, 6:64 AKATSUKI orbiter, 4:19 AL (Astronomical League), 7:17, 8:50–51 albedo, 8:12 Alexhelios (moon of 216 Kleopatra), 6:18 Altair (star), 9:15 amateur astronomy change in construction of portable telescopes, 1:70–73 discovery of asteroids, 12:56–60 ten tips for, 1:68–69 American Association of Variable Star Observers (AAVSO), 6:18, 44–47, 7:58, 10:11 American Astronomical Society decadal survey recommendations, 7:16 Lancelot M. Berkeley-New York Community Trust Prize for Meritorious Work in Astronomy, 3:19 Andromeda Galaxy (M31) image of, 11:26 stellar disks, 6:19 Antarctica, astronomical research in, 10:44–48 Antennae galaxies (NGC 4038 and NGC 4039), 11:32, 56 antimatter, 8:24–29 Antu Telescope, 11:37 APM 08279+5255 (quasar), 11:18 arcminutes, 10:51 arcseconds, 10:51 Arp 147 (galaxy pair), 6:19 Arp 188 (Tadpole Galaxy), 11:30 Arp 273 (galaxy pair), 11:65 Arp 299 (NGC 3690) (galaxy pair), 10:55–57 ARTEMIS spacecraft, 11:17 asteroid belt, origin of, 8:55 asteroids See also names of specific asteroids amateur discovery of, 12:62–63 -
Amateur Astronomers and Dwarf Novae
Amateur Astronomers and Dwarf Novae L. T JENSEN (Denmark); G. POYNER (United Kingdom); P VAN CAUTEREN (Belgium); T VANMUNSTER (Belgium) 1. Introduction the cataclysmic binaries.ln a cataclysmic superhumps, are observed in most binarya mass-Iosing secondary (often a SUUMa stars. The superhumps have a On December 15, 1855 the English late main-sequence dwarf) is in close orbit period of a few per cent longer than the astronomer John Russell Hind (1823 with a white dwarf primary. The orbit is so orbital period. Thus the detection of these 1895) was searching for new minor close that the secondary star fills its superhumps is very important in order to planets in the constellation of Gemini. Roche-volume and hence it loses determine the orbital period of systems During this search he found a new star at material through the inner Lagrange point where this is otherwise very difficult to approximately 9th magnitude. A new L1. The lost gas is accumulated in an obtain. asteroid? He observed the starforseveral accretion disk around the white dwarf. WZ Sge type (UGWZ): This special days and found that it didn't move - thus This material then accretes onto the type of dwarf nova has outbursts very not an asteroid! The next few daysthe star surface of the white dwarf from the disko At seldom. The typical recurrence time is became fainter and fainter and it was the point where the stream of gas from the several decades. Clearly, the detection soon invisible in Hinds telescope. Hethus secondary impacts the disk, a shock front of all outbursts of these rare objects is classified the star as a faint nova. -
PDF Hosted at the Radboud Repository of the Radboud University Nijmegen
PDF hosted at the Radboud Repository of the Radboud University Nijmegen The following full text is a publisher's version. For additional information about this publication click this link. http://hdl.handle.net/2066/159310 Please be advised that this information was generated on 2021-10-09 and may be subject to change. Multi-wavelength Accretion Studies of Cataclysmic Variable Stars Proefschrift ter verkrijging van de graad van doctor aan de Radboud Universiteit Nijmegen op gezag van de rector magnificus prof. dr. J.H.J.M. van Krieken, volgens besluit van het college van decanen in het openbaar te verdedigen op Maandag 3 Oktober 2016 om 10:30 uur precies door Deanne Larissa Coppejans geboren op 7 Februari 1988 te Zuid-Afrika Promotoren: Prof. dr. P.J. Groot Prof. dr. P.A. Woudt University of Cape Town, SA Copromotor: Dr. E.G. Körding Manuscriptcommissie: Prof. dr. R. Kleiss Prof. dr. F.W.M. Verbunt Prof. dr. R.P. Fender University of Oxford, UK Prof. dr. A. Achterberg Dr. S. Scaringi MPE, Duitsland c 2016, Deanne Larissa Coppejans Multi-wavelength Accretion Studies of Cataclysmic Variable Stars Thesis, Radboud University Nijmegen Printed by Ipskamp Printing Illustrated; with bibliographic information and Dutch summary ISBN: 978-94-028-0320-4 Contents 1 Introduction 1 1.1 Cataclysmic Variables..................................1 1.1.1 Structure.....................................1 1.1.2 Mass Transfer...................................3 1.1.3 Formation and Evolution............................4 1.2 Dwarf Novae and Novalikes...............................6 1.2.1 Dwarf Nova Outburst Mechanism........................7 1.2.2 Superoutburst Mechanism............................9 1.3 Radio Emission from Cataclysmic Variables..................... -
SUPERHUMPS in CATACLYSMIC BINARIES. XXIV. TWENTY MORE DWARF NOVAE in Press • Publications of the Astronomical Society of Th
SUPERHUMPS IN CATACLYSMIC BINARIES. XXIV. TWENTY MORE DWARF NOVAE 1,2 3 4,2 JOSEPH PATTERSON, JOHN R. THORSTENSEN, JONATHAN KEMP, 5 6 7 8 DAVID R. SKILLMAN, TONNY VANMUNSTER, DAVID A. HARVEY, ROBERT A. FRIED, 9 10 11 12 LASSE JENSEN, LEWIS M. COOK, ROBERT REA, BERTO MONARD, 13 13 14 15 JENNIE MCCORMICK, FRED VELTHUIS, STAN WALKER, BRIAN MARTIN, 16 17 18 19 GREG BOLT, ELENA PAVLENKO, DARRAGH O’DONOGHUE, JERRY GUNN, 20 21 22 23 RUDOLF NOVÁK, GIANLUCA MASI, GORDON GARRADD, NEIL BUTTERWORTH, 24 25 26 THOMAS KRAJCI, JERRY FOOTE, & EDWARD BESHORE in press • Publications of the Astronomical Society of the Pacific • to appear 2003 November 2003 July 30 Revision ________________________ 01 Department of Astronomy, Columbia University, 550 West 120th Street, New York, NY 10027; [email protected] 02 Visiting Astronomer, Cerro Tololo Interamerican Observatory, National Optical Astronomy Observatories, which is operated by the Association of Universities for Research in Astronomy, Inc. (AURA) under cooperative agreement with the National Science Foundation 03 Department of Physics and Astronomy, Dartmouth College, 6127 Wilder Laboratory, Hanover, NH 03755; [email protected] 04 Joint Astronomy Centre, 660 North A`ohōkū Place, Hilo, HI 96720; [email protected] PATTERSON, J. ET AL.TWENTY MORE DWARF NOVAE 05 Center for Backyard Astrophysics (East), 9517 Washington Avenue, Laurel, MD 20723; [email protected] 06 Center for Backyard Astrophysics (Belgium), Walhostraat 1A, B–3401 Landen, Belgium; [email protected] 07 Center -
November 2016 BRAS Newsletter
NovemberOctober 20162016 IssueIssue th Next Meeting: Monday, November 14 at 7PM at HRPO (2nd Mondays, Highland Road Park Observatory) Join us at this meeting to celebrate BRAS’s 35th Anniversary. Several founding members will be there to help us remember and appreciate our history and achievements. What's In This Issue? President’s Message Secretary's Summary of October Meeting Outreach Report Light Pollution Committee Report Recent Forum Entries 20/20 Vision Campaign Messages from the HRPO The Edge of Night Fall Rocket Camp Observing Notes: Andromeda – The Chained Woman, by John Nagle & Mythology Newsletter of the Baton Rouge Astronomical Society November 2016 President’s Message November already! Holiday season, cold and long nights (all the better to observe under), and it is also the 35th anniversary of the founding of our organization, the Baton Rouge Astronomical Society, commonly called BRAS. At our meeting this month, to “celebrate” the anniversary, we will have cake and refreshments as some of the founders and first members of 35 years ago will regale us with the “story” of how BRAS came into existence, and some of its history. December’s meeting is our annual “pot luck” dinner and the election of officers for the next year. Be thinking about who you want as officers next year. Be prepared to nominate and/or second nominations. Also be prepared for a good meal. The first 3 members who told me they found the Witch Head Nebulae silhouette hidden in the October newsletter were Coy F. Wagoner, Robert Bourgeois, and Cathy Gabel. Congratulations, and well done. -
The Astronomer Magazine Index
The Astronomer Magazine Index The numbers in brackets indicate approx lengths in pages (quarto to 1982 Aug, A4 afterwards) 1964 May p1-2 (1.5) Editorial (Function of CA) p2 (0.3) Retrospective meeting after 2 issues : planned date p3 (1.0) Solar Observations . James Muirden , John Larard p4 (0.9) Domes on the Mare Tranquillitatis . Colin Pither p5 (1.1) Graze Occultation of ZC620 on 1964 Feb 20 . Ken Stocker p6-8 (2.1) Artificial Satellite magnitude estimates : Jan-Apr . Russell Eberst p8-9 (1.0) Notes on Double Stars, Nebulae & Clusters . John Larard & James Muirden p9 (0.1) Venus at half phase . P B Withers p9 (0.1) Observations of Echo I, Echo II and Mercury . John Larard p10 (1.0) Note on the first issue 1964 Jun p1-2 (2.0) Editorial (Poor initial response, Magazine name comments) p3-4 (1.2) Jupiter Observations . Alan Heath p4-5 (1.0) Venus Observations . Alan Heath , Colin Pither p5 (0.7) Remarks on some observations of Venus . Colin Pither p5-6 (0.6) Atlas Coeli corrections (5 stars) . George Alcock p6 (0.6) Telescopic Meteors . George Alcock p7 (0.6) Solar Observations . John Larard p7 (0.3) R Pegasi Observations . John Larard p8 (1.0) Notes on Clusters & Double Stars . John Larard p9 (0.1) LQ Herculis bright . George Alcock p10 (0.1) Observations of 2 fireballs . John Larard 1964 Jly p2 (0.6) List of Members, Associates & Affiliations p3-4 (1.1) Editorial (Need for more members) p4 (0.2) Summary of June 19 meeting p4 (0.5) Exploding Fireball of 1963 Sep 12/13 . -
Interacting Binaries No
Interacting Binaries No. 6, March, 2001 An Electronic Newsletter Editors: Boris T. Gansic¨ ke, Jens Kube Universitats-Ster¨ nwarte, Geismar Landstraße 11, D-37083 Gottingen¨ [email protected] http://www.uni-sw.gwdg.de/ibnews Contents 1 Editorial 2 – IBNews #06 Gansic¨ ke & Kube . 2 2 Abstracts of refereed papers 3 – Z Cam stars: A particular response to a general phenomenon Buat-Menar´ d et al. 3 – Repetitive Rebrightening of EG Cancri: Evidence for Viscosity Decay in Quiescent Disk? Osaki et al. 3 – The standstill luminosity in Z Cam systems Stehle et al. 4 – On the nature of superoutbursts in dwarf novae Truss et al. 4 – On Echo Outbursts and ER UMa Supercycles in SU UMa-type Cataclysmic Variables Hellier . 4 – NLTE accretion disc models for the AM Canum Venaticorum systems Nasser et al. 5 – A ROSAT WFC observation of SW UMa: the EUV behaviour of dwarf novae in superoutburst explai- ned Burleigh et al. 5 – Phase-resolved HST/STIS spectroscopy of the exposed white dwarf in the high-field polar AR UMa Gansic¨ ke et al. 6 – Optical Photometry of the Double-lined Cataclysmic Variable Phoenix 1 Hoard et al. 6 – Hubble Space Telescope spectroscopy of the dwarf nova RX Andromeda I: The underlying white dwarf Sion et al. 7 – X-ray and Optical Spectra of the Unusual Cataclysmic Variables LS Peg and T Leo Szkody et al. 7 – Spectroscopic Discovery of Brown Dwarf-like Secondary Stars in the Cataclysmic Variables LL Andromedae and EF Eridani Howell & Ciardi . 8 – The early X-ray emission from V382 Velorum (=Nova Vel 1999): An internal shock model Mukai & Ishida . -
On ALPHA CENTAURI
A Compilation of Relevant Articles from MMM’s first 25 years, issues 1-250 Introduction: Every atom in our bodies, except hydrogen, has been forged in the fusion furnaces in the cores of stars long since exploded, peppering the interstellar gas clouds with them - clouds out of which future stars and their planets eventually formed. To recast a biblical phrase, “Of stardust thou art, and to the stars thou shalt return!” Humankind was born in Africa, and for well over a hundred thousand years has been spreading from one continent to another, becoming an “intercontinental” species. Now we are crossing another kind of sea to another kind of continent, The Moon, then to others beyond, our next goal is to become an “interplanetary” species. Whether we spread beyond our native solar system depends on many things, surviving our pre- sent and coming geopolitical, global financial, and environmental-economic crises just as important as leaping technological hurdles. But the call is there, and we feel it whenever we look up at the star- studded heavens on a clear night. Moon Miners’ Manifesto’s purpose has been to help flush out, and then flesh out how we will establish a growing civilian beachhead on the Moon, Mars and beyond. Here and there, we’ve had a few articles peeping beyond our solar system, about what might lay beyond along our path “home.” They are reprinted below. Our near-term goal is to learn much more about what lies out there, by telescopes on the Moon and in space INDEX MMM THEMES: Starbound! ARTICLES: MMM #17 Design for an Amateur Lunar