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An Atlas of Far-Ultraviolet Spectra of the Zeta Aurigae Binary 31 Cygni with Line Identifications
The Astrophysical Journal Supplement Series, 211:27 (14pp), 2014 April doi:10.1088/0067-0049/211/2/27 C 2014. The American Astronomical Society. All rights reserved. Printed in the U.S.A. AN ATLAS OF FAR-ULTRAVIOLET SPECTRA OF THE ZETA AURIGAE BINARY 31 CYGNI WITH LINE IDENTIFICATIONS Wendy Hagen Bauer1 and Philip D. Bennett2,3 1 Whitin Observatory, Wellesley College, 106 Central Street, Wellesley, MA 02481, USA; [email protected] 2 Department of Astronomy & Physics, Saint Mary’s University, Halifax, NS B3H 3C3, Canada 3 Eureka Scientific, Inc., 2452 Delmer Street, Suite 100, Oakland, CA 94602-3017, USA Received 2013 March 29; accepted 2013 October 26; published 2014 April 2 ABSTRACT The ζ Aurigae system 31 Cygni (K4 Ib + B4 V) was observed by the FUSE satellite during total eclipse and at three phases during chromospheric eclipse. We present the coadded, calibrated spectra and atlases with line identifications. During total eclipse, emission from high ionization states (e.g., Fe iii and Cr iii) shows asymmetric profiles redshifted from the systemic velocity, while emission from lower ionization states (e.g., Fe ii and O i) appears more symmetric and is centered closer to the systemic velocity. Absorption from neutral and singly ionized elements is detected during chromospheric eclipse. Late in chromospheric eclipse, absorption from the K star wind is detected at a terminal velocity of ∼80 km s−1. These atlases will be useful for interpreting the far-UV spectra of other ζ Aur systems, as the observed FUSE spectra of 32 Cyg, KQ Pup, and VV Cep during chromospheric eclipse resemble that of 31 Cyg. -
THE 1979 ECLIPSE of ZETA AURIGAE Robert D. Chapman
THE 1979 ECLIPSE OF ZETA AURIGAE Robert D. Chapman Laboratory forAstronomy and Solar Physics Goddard Space Flight Center Greenbelt, ND 20771 ABSTRACT Observations of the system ; Aurigae made around primary eclipse are described, and their significance is discussed in a preliminary fashion. THE OBSERVATIONS High-dispersion, long- and short-wavelength spectra of the atmospheric eclipsing binary star system ; Aurigae (K2II + B8V) have been obtained during a total of ten observing sessions between September 15, 1979 and March 31, 1980. Dates of observations, corresponding to numbered positions in Figure I are: (I) Sept. 15, (2) Nov. i, (3) Nov. 13, (4) Nov. 15, (S) Nov. 18, (6) Nov. 22, (7) Dec. 16, [8) Jan. 29, (9) Feb. 29, (10) Mar. 31. The spectrum obtained on Sept. 15 resembles the spectrum of a single late B-star [e.g. the B6V star o Eri). Atmospheric effects are present and increasing in strength between Nov. i and Nov. 18. To a first approximation, the spectrum changes appear to be an increase in strength and number of absorption lines with changes in the undisturbed continuum being small. This point requires further study, however. On Nov. 22, the B star had passed second contact, and the spectrum of the system was a pure emission line spectrum. At mid-eclipse, on Dec. 16 the spectrum had changed but little from its appearance on Nov. 22. The egress spectra obtained in 1980 are not significantly different in appearance from the ingress spectra. A study of differences in detail is being undertaken now. Figure 2 shows the behavior of the Fe II resonance lines in three spectra. -
Successful Observing Sessions HOWL-EEN FUN Kepler’S Supernova Remnant Harvard’S Plate Project and Women Computers
Published by the Astronomical League Vol. 69, No. 4 September 2017 Successful Observing Sessions HOWL-EEN FUN Kepler’s Supernova Remnant Harvard’s Plate Project and Women Computers T HE ASTRONOMICAL LEAGUE 1 he 1,396th entry in John the way to HR 8281, is the Dreyer’s Index Catalogue of Elephant’s Trunk Nebula. The T Nebulae and Clusters of left (east) edge of the trunk Stars is associated with a DEEP-SKY OBJECTS contains bright, hot, young galactic star cluster contained stars, emission nebulae, within a large region of faint reflection nebulae, and dark nebulosity, and a smaller region THE ELEPHANT’S TRUNK NEBULA nebulae worth exploring with an within it called the Elephant’s 8-inch or larger telescope. Trunk Nebula. In general, this By Dr. James R. Dire, Kauai Educational Association for Science & Astronomy Other features that are an entire region is absolute must to referred to by the check out in IC pachyderm 1396 are the proboscis phrase. many dark IC 1396 resides nebulae. Probably in the constellation the best is Cepheus and is Barnard 161. This located 2,400 light- dark nebula is years from Earth. located 15 To find IC 1396, arcminutes north start at Alpha of SAO 33652. Cephei, a.k.a. The nebula Alderamin, and go measures 5 by 2.5 five degrees arcminutes in southeast to the size. The nebula is fourth-magnitude very dark. Myriad red star Mu Cephei. Milky Way stars Mu Cephei goes by surround the the Arabic name nebula, but none Erakis. It is also can be seen in called Herschel’s this small patch of Garnet Star, after the sky. -
STELLA Nummer 3 1992
_ *S*T*E*L*L*A* är medlemstidningen UTGIVEN av och för STAR, Stockholms amatörastro- nomer. Tidningen UTKOMMER med ca 300 ex. 4 GGR/ÅR och erhålles gratis av medlemmar. i REDAKTÖRER och ansvariga utgivare är Hans Hellberg Jens Ergon Lofotengatan 16, Husby Kaggeholmsvägen 66 164 33 KISTA 122 40 ENSKEDE i ALLA BIDRAG AR VÄLKOMNA. men de skall helst vara utskrivna på elskrivmaskin, skön- eller laserskrivare. Red förbehåller sig att taga bort i eller redigera artiklar så att de passar det aktuella numret i samråd med förf. Ar du tveksam om materialet passar. ring och hör med red. Tala om hur du vill ha din artikel. ~k MEDLEM i STAR blir man genom att betala in ársavgiften till STAR'S postgiro 70 87 05 - 9. För l992 gäller följande avgifter: 75:- för dem som är under 26 är, 100:- för övriga. För ytterligare l00:- kan man även bli medlem av Svenska Astronomiska sällskapet och fà Astronomisk Tidsskrift. Detta förmånliga erbjudande gäller endast för STARmedlemmar, som betalar avgiften till STAR'S postgiro. Glöm ej att ange namm adress, samt om du är ny medlem. Å' STAR bildades 1988 och är en sammanslagning av tidigare astronomi- föreningar i Stockholm. STAR förfogar över tre OBSERVATORIER i Stockholmstrakten; i Djursholm. i Saltsjöbaden och i vàr KLUBBLOKAL, MAGNETHUSET på Observatoriekullen. STAR anordnar föredrag, bild: och filmvisningar. astronomiska observationer, astrofoto, teleskopbygge, vanlig mötesverksamhet m m. Pâ måndagar håller STAR, utom under helg eller lov, ÖPPET HUS i Magnethuset. på Observatoriekullen. kl l9,00. Har du frågor? Kom till oss eller skriv, via KLUBBENS ADRESS: STAR _ Gamla Observatoriet Drottning atan 120 113 60 OCKHOLM Ordförande; Mikael Jargelius Teknisk redaktör; Hans Hellberg Grafikv. -
Spaziergang Unter Sternen“ – Im Tübinger Ferienprogramm 2012 Ausgerichtet Von Der Astronomischen Vereinigung Tübingen E.V
„Spaziergang unter Sternen“ – im Tübinger Ferienprogramm 2012 Ausgerichtet von der Astronomischen Vereinigung Tübingen e.V. = AVT (www.sternwarte-tuebingen.de); Wolfgang Martin Wettlaufer Der Sternenhimmel – in der freien Natur ist der nur zu erkennen unter einem dunklen Firmament. Weil die Sterne so unglaublich weit in der Ferne stehen, erscheinen sie uns nur als feine Lichtpunkte. Trotzdem sind sie gewaltige Himmelskörper wie ‚unser‘ Stern: die Sonne, und deshalb vermögen sie so blendend zu leuchten wie sie. Wie groß, wie hell und wie fern uns die Gestirne sind, das zu erkennen haben Astronomen lange forschen müssen! Wir wollen ein wenig über sie erfahren, während wir mit bloßen Augen und mit Ferngläsern zu ihnen aufblicken (abschließend noch mit den großen Teleskopen der Sternwarte). Auch ein paar von den 88 Sternbildern, die es am Himmel gibt, werden wir kennenlernen; oft bilden weniger helle Sterne ihre Umrisse. Deshalb wählen wir uns für einen tieferen Blick auf dieses große „Naturschauspiel“ auch einen mondlosen Abend, und dazu einen Ort, der möglichst weitab vom Streulicht der vielen Lampen gelegen ist. An den Anfang stellen wir nun ein wenig bekanntes Sternbild, das sich im Spätsommer und Herbst aber gut beobachten läßt; es steht abends im Norden hoch am Himmel: CEPHEUS. Benannt nach einem König aus der antiken griechischen Sagenwelt (die Nachbar-Sternbilder Cassiopeia = das „Himmels-W“, und Andromeda gehören auch dazu), zeigt es uns einige „bunte“ Sterne – rötlich oder blau sind sie gefärbt, was uns richtig erst im Fernglas oder Fernrohr auffällt! Hier der CEPHEUS über der Sternwartenkuppel: Nördlicher α Cephei = Alderamin Beta Cephei Himmelspol +Polarstern Größter Riesenstern: VV Cephei (Doppel) µ Cephei: Granatstern 2002: Komet Ikeya-Zhang Zeta Cephei Gamma Cephei Jota Cephei Delta Cephei Tübinger Sternwarte, 8,2-m-Kuppel (von 1956) Abb. -
The Impact of Giant Stellar Outflows on Molecular Clouds
The Impact of Giant Stellar Outflows on Molecular Clouds A thesis presented by H´ector G. Arce Nazario to The Department of Astronomy in partial fulfillment of the requirements for the degree of Doctor of Philosophy in the subject of Astronomy Harvard University Cambridge, Massachusetts October, 2001 c 2001, by H´ector G. Arce Nazario All Rights Reserved ABSTRACT Thesis Advisor: Alyssa A. Goodman Thesis by: H´ector G. Arce Nazario We use new millimeter wavelength observations to reveal the important effects that giant (parsec-scale) outflows from young stars have on their surroundings. We find that giant outflows have the potential to disrupt their host cloud, and/or drive turbulence there. In addition, our study confirms that episodicity and a time-varying ejection axis are common characteristics of giant outflows. We carried out our study by mapping, in great detail, the surrounding molecular gas and parent cloud of two giant Herbig-Haro (HH) flows; HH 300 and HH 315. Our study shows that these giant HH flows have been able to entrain large amounts of molecular gas, as the molecular outflows they have produced have masses of 4 to 7 M |which is approximately 5 to 10% of the total quiescent gas mass in their parent clouds. These outflows have injected substantial amounts of −1 momentum and kinetic energy on their parent cloud, in the order of 10 M km s and 1044 erg, respectively. We find that both molecular outflows have energies comparable to their parent clouds' turbulent and gravitationally binding energies. In addition, these outflows have been able to redistribute large amounts of their surrounding medium-density (n ∼ 103 cm−3) gas, thereby sculpting their parent cloud and affecting its density and velocity distribution at distances as large as 1 to 1.5 pc from the outflow source. -
Arxiv:2006.10868V2 [Astro-Ph.SR] 9 Apr 2021 Spain and Institut D’Estudis Espacials De Catalunya (IEEC), C/Gran Capit`A2-4, E-08034 2 Serenelli, Weiss, Aerts Et Al
Noname manuscript No. (will be inserted by the editor) Weighing stars from birth to death: mass determination methods across the HRD Aldo Serenelli · Achim Weiss · Conny Aerts · George C. Angelou · David Baroch · Nate Bastian · Paul G. Beck · Maria Bergemann · Joachim M. Bestenlehner · Ian Czekala · Nancy Elias-Rosa · Ana Escorza · Vincent Van Eylen · Diane K. Feuillet · Davide Gandolfi · Mark Gieles · L´eoGirardi · Yveline Lebreton · Nicolas Lodieu · Marie Martig · Marcelo M. Miller Bertolami · Joey S.G. Mombarg · Juan Carlos Morales · Andr´esMoya · Benard Nsamba · KreˇsimirPavlovski · May G. Pedersen · Ignasi Ribas · Fabian R.N. Schneider · Victor Silva Aguirre · Keivan G. Stassun · Eline Tolstoy · Pier-Emmanuel Tremblay · Konstanze Zwintz Received: date / Accepted: date A. Serenelli Institute of Space Sciences (ICE, CSIC), Carrer de Can Magrans S/N, Bellaterra, E- 08193, Spain and Institut d'Estudis Espacials de Catalunya (IEEC), Carrer Gran Capita 2, Barcelona, E-08034, Spain E-mail: [email protected] A. Weiss Max Planck Institute for Astrophysics, Karl Schwarzschild Str. 1, Garching bei M¨unchen, D-85741, Germany C. Aerts Institute of Astronomy, Department of Physics & Astronomy, KU Leuven, Celestijnenlaan 200 D, 3001 Leuven, Belgium and Department of Astrophysics, IMAPP, Radboud University Nijmegen, Heyendaalseweg 135, 6525 AJ Nijmegen, the Netherlands G.C. Angelou Max Planck Institute for Astrophysics, Karl Schwarzschild Str. 1, Garching bei M¨unchen, D-85741, Germany D. Baroch J. C. Morales I. Ribas Institute of· Space Sciences· (ICE, CSIC), Carrer de Can Magrans S/N, Bellaterra, E-08193, arXiv:2006.10868v2 [astro-ph.SR] 9 Apr 2021 Spain and Institut d'Estudis Espacials de Catalunya (IEEC), C/Gran Capit`a2-4, E-08034 2 Serenelli, Weiss, Aerts et al. -
Observation and Interpretation of Zeta Aurigae Stars
OBSERVATION AND INTERPRETATION OF ZETA AURIGAE STARS Robert D. Chapman Sciences Directorate Goddard Space Flight Center Greenbelt, Maryland 20771 ABSTRACT. The ultraviolet observations of four Zeta Aurigau stars are reviewed. A, probably oversimplified, interpretation of the observa tions points to a straight forward connection between the spectral type of the B star and the amount of high temperature plasma in the systems. 1. INTRODUCTION There are six stars that are considered to be Zeta Aurigae stars by various authors. Table 1 Zeta Aurigae Stars Star Spectral Stars Period (days) Zeta Aur K3II + B7V 972.2 31 Cyg K4Ib + B4V 3784. 32 Cyg K5Iab + B8V 1148. 22 Vul G3Ib-II + B9V 249.1 Epsilon Aur FOIap + ?? 9885. W Cephei M2la + Be 7430 Of these stars, the last two will not be treated here because they are discussed elsewhere in the proceedings and because they differ somewhat from the first four stars on the list. The most obvious feature of the Zeta Aurigae stars is the atmospheric eclipse. The orbital inclination of all the pairs is near 90°, and when the B star goes into eclipse behind the late-type primary, its light passes through the atmosphere of the primary giving a depth dependent probe of the atmospheric structure. The atmospheric eclipse of 22 Vul was discovered recently by Parsons and Ake (1983 a, b) using spectra taken by the International Ultraviolet Explorer (IUE). The atmospheric eclipses of Zeta Aur, 31 and 32 Cyg were discovered much earlier and have been studied at length using ground based spectra (cf, for instance, Wright 1970). -
Molecular Jets and Outflows from Young Stellar Objects in Cygnus-X, Auriga, and Cassiopeia
Kent Academic Repository Full text document (pdf) Citation for published version Makin, Sally Victoria (2019) Molecular jets and outflows from young stellar objects in Cygnus-X, Auriga, and Cassiopeia. Doctor of Philosophy (PhD) thesis, University of Kent,. DOI Link to record in KAR https://kar.kent.ac.uk/72857/ Document Version UNSPECIFIED Copyright & reuse Content in the Kent Academic Repository is made available for research purposes. Unless otherwise stated all content is protected by copyright and in the absence of an open licence (eg Creative Commons), permissions for further reuse of content should be sought from the publisher, author or other copyright holder. Versions of research The version in the Kent Academic Repository may differ from the final published version. Users are advised to check http://kar.kent.ac.uk for the status of the paper. Users should always cite the published version of record. Enquiries For any further enquiries regarding the licence status of this document, please contact: [email protected] If you believe this document infringes copyright then please contact the KAR admin team with the take-down information provided at http://kar.kent.ac.uk/contact.html UNIVERSITY OF KENT DOCTORAL THESIS Molecular jets and outflows from young stellar objects in Cygnus-X, Auriga, and Cassiopeia Author: Supervisor: Sally Victoria MAKIN Dr. Dirk FROEBRICH A thesis submitted in fulfilment of the requirements for the degree of Doctor of Philosophy in the Centre for Astrophysics and Planetary Science School of Physical Sciences January 30, 2019 Declaration of Authorship I, Sally Victoria MAKIN, declare that this thesis titled, “Molecular jets and outflows from young stellar objects in Cygnus-X, Auriga, and Cassiopeia” and the work presented in it are my own. -
News from the Society for Astronomical Sciences
News from the Society for Astronomical Sciences Vol. 9 No. 4 (October, 2011) SAS at PATS-2011 The Society for Astronomical Sciences had a productive presence at this year’s Pacific Astronomy and Tele- scope Show. Our booth display, designed to en- courage curiosity and interest in small- telescope science, seemed to gener- ate a nice response. Quite a few visi- tors engaged us in long conversations about projects, equipment, and the research contributions that are made by backyard scientists. We didn’t keep count, but at least a hundred people picked up SAS brochures. Also at PATS, Brian Warner presented a lecture on “Measuring the Universe”, which focused specifically on finding variable stars, and determining their lightcurves. About 40 people attended the lecture, and at least half of them accepted free copies of MPO Canopus, to facilitate their own entry into “backyard science”. If you are giving a lecture or participat- ing in a conference, and would like some SAS brochures to hand out, or the 3-poster SAS display, contact Bob Buchheim. Gene Lucas (left) explains the value of small-telescope science to a visitor at the SAS booth during PATS-2011. Photo by Bob Buchheim. Call for Observations of Zeta Aurigae Eclipse making these eclipses 10 times less during, and after the Octo- rare than the 9890 day cycle for Epsi- ber/November 2011 primary eclipse Here is a project that will build on your are needed – most particularly during experience with Epsilon Aurigae, and lon Aur. Primary eclipses occur when the B-star is eclipsed by the (much the ingress and egress stages, where enable you to contribute to the study of the hot star acts as a probe for the a stellar atmosphere. -
2013 Apr 30 FINAL PROGRAM, AAS TCS3, Giants of Eclipse, Monterey
2013 Apr 30 FINAL PROGRAM, AAS TCS-3, Giants of Eclipse, Monterey CA, 28 July ± 2 August, 2013 Sunday 28 July 6-8pm Opening reception Monday 29 July Session 1A ± Overview 0900-0910 Griffin & Stencel Introduction and welcome 0910-0945 Edward Guinan Villanova University Atmospheric Eclipses Now and Then: Probes of Stellar and Planetary Atmospheres 0945-1020 Andrea Dupree Harvard-Smithsonian Center for Astrophysics Spectroscopy of Binaries and Friends 1020-1030 Griffin & Stencel Meeting logistics 1030-1100 Break Session 1B - VV Cep stars 1100-1135 Wendy Bauer, Wellesley College The Ultraviolet Spectrum of VV Cephei from Eclipse Through Quadrature 1135-1210 Philip Bennett, Saint Mary©s University The Fundamental Parameters and Chromospheric Structure of the M Supergiant VV Cephei 1210-1230 Bernard Yuhas, Kutztown University First CCD Photometry of the Interacting Binary AF Geminorum 1230-1400 Lunch Session 1C ± Theory 1 1400-1435 Peter Eggleton, LLNL Former Triples among Combined-Spectrum Binaries 1435-1455 Roger Griffin, University of Cambridge Radial-velocity Measurements of Eclipsing and Other Composite-spectrum Binary Systems 1455-1530 Thomas Ayres, University of Colorado Red Giant Atmospheres, through the Lens of UV Spectroscopy 1530-1600 Break 1600-1630 Poster highlights ** (5 min summaries) **Posters: Frank J Melillo The Challenge of Observing the Zeta Aurigae Binary Stars Frank J Melillo The Challenge of Observing the Recent Eclipse of Epsilon Aurigae Wendy Bauer A Far-Ultraviolet Spectral Atlas of 31 Cygni Katelyn Ciccozzi Photometric -
Proquest Dissertations
IMPROVING OUR UNDERSTANDING OF SRC VARIABLE STARS by Kathleen Elizabeth Moncrieff A thesis submitted to the faculty of Saint Mary's University in partial fulfillment of the requirements for the degree of Doctor of Philosophy in Astronomy April 2011, Halifax, Nova Scotia Copyright © 2011 Kathleen Elizabeth Moncrieff Approved: Dr. David G. Turner, Chair Approved: Dr. C. Ian Short, Committee Member Approved: Dr. Eric G. Hintz, External Examiner Date: April 20, 2011 Library and Archives Bibliotheque et 1*1 Canada Archives Canada Published Heritage Direction du Branch Patrimoine de I'edition 395 Wellington Street 395, rue Wellington OttawaONK1A0N4 OttawaONK1A0N4 Canada Canada Your file Votre reference ISBN: 978-0-494-79650-4 Our file Notre reference ISBN: 978-0-494-79650-4 NOTICE: AVIS: The author has granted a non L'auteur a accorde une licence non exclusive exclusive license allowing Library and permettant a la Bibliotheque et Archives Archives Canada to reproduce, Canada de reproduire, publier, archiver, publish, archive, preserve, conserve, sauvegarder, conserver, transmettre au public communicate to the public by par telecommunication ou par I'lnternet, prefer, telecommunication or on the Internet, distribuer et vendre des theses partout dans le loan, distribute and sell theses monde, a des fins commerciales ou autres, sur worldwide, for commercial or non support microforme, papier, electronique et/ou commercial purposes, in microform, autres formats. paper, electronic and/or any other formats. The author retains copyright L'auteur conserve la propriete du droit d'auteur ownership and moral rights in this et des droits moraux qui protege cette these. Ni thesis. Neither the thesis nor la these ni des extraits substantiels de celle-ci substantial extracts from it may be ne doivent etre imprimes ou autrement printed or otherwise reproduced reproduits sans son autorisation.