Počet záznamů: 1
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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SYSNO ASEP 0354785 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název 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 Tvůrce(i) Koubský, Pavel (ASU-R) RID, ORCID
Hummmel, C.A. (DE)
Harmanec, P. (CZ)
Tycner, C. (US)
van Leeuwen, F. (GB)
Yang, S. (CA)
Šlechta, Miroslav (ASU-R) RID, ORCID
Božić, H. (HR)
Zavala, R.T. (US)
Ruzdjak, D. (HR)
Sudar, D. (HR)Zdroj.dok. Astronomy & Astrophysics. - : EDP Sciences - ISSN 0004-6361
Roč. 517, July (2010), A24/1-A24/29Poč.str. 29 s. Jazyk dok. eng - angličtina Země vyd. FR - Francie Klíč. slova close binaries ; spectroscopic Vědní obor RIV BN - Astronomie a nebeská mechanika, astrofyzika CEP GA205/03/0788 GA ČR - Grantová agentura ČR GD205/08/H005 GA ČR - Grantová agentura ČR CEZ AV0Z10030501 - ASU-R (2005-2011) UT WOS 000280929400034 DOI 10.1051/0004-6361/201014477 Anotace 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. Pracoviště Astronomický ústav Kontakt Radka Svašková, bibl@asu.cas.cz, Tel.: 323 620 326 Rok sběru 2011
Počet záznamů: 1