About: Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiwopeae and its circumstellar environment

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About: Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiwopeae and its circumstellar environment Goto Sponge NotDistinct Permalink

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rdf:type	skos:Concept http://linked.opendata.cz/ontology/domain/vavai/Vysledek
Description	The analysis of radial velocities of the Be star o Cas from spectra taken between 1992 and 2008 at the Ondřejov Observatory and the Dominion Astrophysical Observatory allowed us to reconfirm the binary nature of this object, first suggested by Abt and Levy in 1978, but later refuted by several authors. The orbital parameters of this SB1 system imply a very high mass function of about one solar mass. This in turn leads to a very high mass of the secondary, possibly higher than that of the primary. In order to look for such a massive secondary, o Cas was observed with the Navy Prototype Optical Interferometer, which allowed the binary components to be spatially resolved for the first time. The interferometric observations lead to the detection of a secondary, about 3 mag fainter than the primary. The possible properties of this peculiar binary system and the reasons why the massive secondary does not dominate the optical spectrum are discussed. The analysis of radial velocities of the Be star o Cas from spectra taken between 1992 and 2008 at the Ondřejov Observatory and the Dominion Astrophysical Observatory allowed us to reconfirm the binary nature of this object, first suggested by Abt and Levy in 1978, but later refuted by several authors. The orbital parameters of this SB1 system imply a very high mass function of about one solar mass. This in turn leads to a very high mass of the secondary, possibly higher than that of the primary. In order to look for such a massive secondary, o Cas was observed with the Navy Prototype Optical Interferometer, which allowed the binary components to be spatially resolved for the first time. The interferometric observations lead to the detection of a secondary, about 3 mag fainter than the primary. The possible properties of this peculiar binary system and the reasons why the massive secondary does not dominate the optical spectrum are discussed. (en)
Title	Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiwopeae and its circumstellar environment Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiwopeae and its circumstellar environment (en)
skos:prefLabel	Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiwopeae and its circumstellar environment Properties and nature of Be stars 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiwopeae and its circumstellar environment (en)
skos:notation	RIV/67985815:_____/10:00354785!RIV11-GA0-67985815
http://linked.open...avai/riv/aktivita	P Z
http://linked.open...avai/riv/aktivity	P(GA205/03/0788), P(GA205/06/0304), P(GAP209/10/0715), P(GD205/08/H005), Z(AV0Z10030501), Z(MSM0021620860)
http://linked.open...iv/cisloPeriodika	July
http://linked.open...vai/riv/dodaniDat	2011
http://linked.open...aciTvurceVysledku	Šlechta, Miroslav Koubský, Pavel
http://linked.open.../riv/druhVysledku	J - Článek v odborném periodiku
http://linked.open...iv/duvernostUdaju	S - Úplné a pravdivé údaje nepodléhající ochraně podle zvláštních právních předpisů
http://linked.open...titaPredkladatele	Astronomický ústav AV ČR, v. v. i.
http://linked.open...dnocenehoVysledku	282909
http://linked.open...ai/riv/idVysledku	RIV/67985815:_____/10:00354785
http://linked.open...riv/jazykVysledku	eng - angličtina
http://linked.open.../riv/klicovaSlova	close binaries; spectroscopic (en)
http://linked.open.../riv/klicoveSlovo	spectroscopic close binaries
http://linked.open...odStatuVydavatele	FR - Francouzská republika
http://linked.open...ontrolniKodProRIV	[6031405FD32B]
http://linked.open...i/riv/nazevZdroje	Astronomy and Astrophysics
http://linked.open...in/vavai/riv/obor	BN
http://linked.open...ichTvurcuVysledku	2 (xsd:int)
http://linked.open...cetTvurcuVysledku	11 (xsd:int)
http://linked.open...vavai/riv/projekt	Physics of Sun, stars, and stellar systems Accurate physical properties of hot stars based on binary and multiple star studies assymetry of Be-star envelopes Improving physics of hot stars via observations of suitably selected binaries
http://linked.open...UplatneniVysledku	2010
http://linked.open...v/svazekPeriodika	517
http://linked.open...iv/tvurceVysledku	Šlechta, Miroslav Koubský, Pavel Harmanec, P. Sudar, D. Yang, S. Bozic, H. Ruzdjak, D. Hummmel, C. A. Tycner, C. Zavala, R. T. van Leeuwen, F.
http://linked.open...ain/vavai/riv/wos	000280929400034
http://linked.open...n/vavai/riv/zamer	Astronomie a astrofyzika Fyzikální studium objektů a procesů ve sluneční soustavě a v astrofyzikálních systémech
issn	0004-6361
number of pages	29 (xsd:int)

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