Properties and nature of Be stars 29. Orbital and long-term spectral variations of gamma Cassiopeiae

0388414 - ASÚ 2013 RIV FR eng J - Článek v odborném periodiku
Nemravová, J. - Harmanec, P. - Koubský, Pavel - Miroshnichenko, A. S. - Yang, S. - Šlechta, Miroslav - Buil, C. - Korčáková, D. - Votruba, Viktor
Properties and nature of Be stars 29. Orbital and long-term spectral variations of gamma Cassiopeiae.
Astronomy & Astrophysics. Roč. 537, January (2012), A59/1-A59/11. ISSN 0004-6361. E-ISSN 1432-0746
Grant CEP: GA ČR GD205/08/H005
Grant ostatní: ESA(XE) ESA-PECS project No. 98058
Výzkumný záměr: CEZ:AV0Z10030501
Klíčová slova: spectroscopic * early-type stars * Be stars
Kód oboru RIV: BN - Astronomie a nebeská mechanika, astrofyzika
Impakt faktor: 5.084, rok: 2012

A detailed analysis of more than 800 electronic high-resolution spectra of gamma Cas, which were obtained during a time interval of over 6000 days (16.84 yr) at several observatories, documents the smooth variations in the density and/or extent of its circumstellar envelope. We found a clear anticorrelation between the peak intensity and FWHM of the H alpha emission, which seems to agree with recent models of such emission lines.
Trvalý link: http://hdl.handle.net/11104/0217306