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Combined Spectroscopic and Interferometric (NPOI) Observations of the Be star o Cassiopeiae


Koubský, P.; Hummel, C.; Harmanec, P.; Yang, S.; Božić, Hrvoje; Tycner, C.; Zavala, R.
Combined Spectroscopic and Interferometric (NPOI) Observations of the Be star o Cassiopeiae // The Interferometric View on Hot Stars, Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 38 / Rivinius, T. ; Curé, M. (ur.).
Viña del Mar, Čile, 2010. str. 87-88 (predavanje, međunarodna recenzija, cjeloviti rad (in extenso), znanstveni)


Naslov
Combined Spectroscopic and Interferometric (NPOI) Observations of the Be star o Cassiopeiae

Autori
Koubský, P. ; Hummel, C. ; Harmanec, P. ; Yang, S. ; Božić, Hrvoje ; Tycner, C. ; Zavala, R.

Vrsta, podvrsta i kategorija rada
Radovi u zbornicima skupova, cjeloviti rad (in extenso), znanstveni

Izvornik
The Interferometric View on Hot Stars, Revista Mexicana de Astronomía y Astrofísica (Serie de Conferencias) Vol. 38 / Rivinius, T. ; Curé, M. - , 2010, 87-88

Skup
The Interferometric View on Hot Stars

Mjesto i datum
Viña del Mar, Čile, 02-06.03.2009

Vrsta sudjelovanja
Predavanje

Vrsta recenzije
Međunarodna recenzija

Ključne riječi
Astrometry; binaries: spectroscopic; stars: emission-line; Be

Sažetak
The analysis of radial velocities of the Be star o Cas from spectra taken between 1992 and 2008 at Ondrejov and Dominion Astrophysical Observatories 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 check for the existence of 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 are discussed.

Izvorni jezik
Engleski

Znanstvena područja
Fizika



POVEZANOST RADA


Projekt / tema
007-0000000-1364 - Fizikalni procesi u atmosferama Sunca i zvijezda (Vladimir Ruždjak, )

Ustanove
Geodetski fakultet, Zagreb

Autor s matičnim brojem:
Hrvoje Božić, (96760)