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


Koubský, P.; Hummel, C.A.; Harmanec, P.; Tycner, C.; van Leeuwen, F.; Yang, S.; Šlechta, M.; Božić, Hrvoje; Zavala, R.T.; Ruždjak, Domagoj; Sudar, Davor
Properties and nature of Be stars. 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiopeæ and its circumstellar environment // Astronomy & Astrophysics, 517 (2010), A24-1 doi:10.1051/0004-6361/201014477 (međunarodna recenzija, članak, znanstveni)


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

Autori
Koubský, P. ; Hummel, C.A. ; Harmanec, P. ; Tycner, C. ; van Leeuwen, F. ; Yang, S. ; Šlechta, M. ; Božić, Hrvoje ; Zavala, R.T. ; Ruždjak, Domagoj ; Sudar, Davor

Izvornik
Astronomy & Astrophysics (0004-6361) 517 (2010); A24-1

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
binaries: close; binaries: spectroscopic; stars: emission-line; Be; stars: fundamental parameters; stars: individual: o Cas

Sažetak
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.

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

Profili:

Avatar Url Domagoj Ruždjak (autor)

Avatar Url Davor Sudar (autor)

Avatar Url Hrvoje Božić (autor)

Citiraj ovu publikaciju

Koubský, P.; Hummel, C.A.; Harmanec, P.; Tycner, C.; van Leeuwen, F.; Yang, S.; Šlechta, M.; Božić, Hrvoje; Zavala, R.T.; Ruždjak, Domagoj; Sudar, Davor
Properties and nature of Be stars. 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiopeæ and its circumstellar environment // Astronomy & Astrophysics, 517 (2010), A24-1 doi:10.1051/0004-6361/201014477 (međunarodna recenzija, članak, znanstveni)
Koubský, P., Hummel, C., Harmanec, P., Tycner, C., van Leeuwen, F., Yang, S., Šlechta, M., Božić, H., Zavala, R., Ruždjak, D. & Sudar, D. (2010) Properties and nature of Be stars. 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiopeæ and its circumstellar environment. Astronomy & Astrophysics, 517, A24-1 doi:10.1051/0004-6361/201014477.
@article{article, year = {2010}, pages = {A24-1-A24-29}, DOI = {10.1051/0004-6361/201014477}, keywords = {binaries: close, binaries: spectroscopic, stars: emission-line, Be, stars: fundamental parameters, stars: individual: o Cas}, journal = {Astronomy and Astrophysics}, doi = {10.1051/0004-6361/201014477}, volume = {517}, issn = {0004-6361}, title = {Properties and nature of Be stars. 28. Implications of systematic observations for the nature of the multiple system with the Be star o Cassiope\ae and its circumstellar environment}, keyword = {binaries: close, binaries: spectroscopic, stars: emission-line, Be, stars: fundamental parameters, stars: individual: o Cas} }

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    • SCI-EXP, SSCI i/ili A&HCI
  • Scopus


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