Pregled bibliografske jedinice broj: 98954
Omega Orionis and the Be stars
Omega Orionis and the Be stars // Observational Aspects of Pulsating B- and A Stars / Sterken, Christian and Kurtz, Donald W. (ur.).
San Francisco (CA): Astronomical Society of the Pacific (ASP), 2001. str. 9 - 9 (predavanje, nije recenziran, sažetak, znanstveni)
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Naslov
Omega Orionis and the Be stars
Autori
Balona, L.A., Handler, G., Aerts, C., Bozic, H., Guinan, E.F., James, D.J., Kaye, A.B., Shobbrook, R.R.
Vrsta, podvrsta i kategorija rada
Sažeci sa skupova, sažetak, znanstveni
Izvornik
Observational Aspects of Pulsating B- and A Stars
/ Sterken, Christian and Kurtz, Donald W. - San Francisco (CA) : Astronomical Society of the Pacific (ASP), 2001, 9 - 9
Skup
Observational Aspects of Pulsating B- and A Stars
Mjesto i datum
Bruxelles, Belgija, 24.07.2001. - 25.07.2001
Vrsta sudjelovanja
Predavanje
Vrsta recenzije
Nije recenziran
Sažetak
We summarize the results of a multisite spectroscopic and photometric campaign on the Be star omega Orionis. There is only one period, P = 0.97d, which is visible in the photometry and line profile variations. We caution against the indiscriminate use of the radial velocity to infer multiperiodicity. The helium lines are narrower than the metal lines and may be contaminated by circumstellar material. The line profiles show two excess absorption features moving in antiphase. As in other Be stars, the periodic variations are clearly present in the emission wings of some helium lines and in the core of Hbeta. From this we conclude that the periodic variations are most probably associated with co-rotating circumstellar material. We discuss the Be stars in terms of a fast magnetic rotator model.
Izvorni jezik
Engleski
Znanstvena područja
Fizika
