The field high-amplitude SX Phe variable BL Cam: results from a multisite photometric campaign. II. Evidence of a binary - possibly triple - system

0354408 - ASÚ 2011 RIV FR eng J - Článek v odborném periodiku
Fauvaud, S. - Sareyan, J.P. - Ribas, I. - Rodriguez, E. - Lampens, P. - Klingenberg, G. - Farrell, J.A. - Fumagalli, F. - Simonetti, J.H. - Wolf, M. - Santacana, G. - Zhou, A. - Michel, R. - Fox-Machado, L. - Alvarez, M. - Nava-Vega, A. - Lopez-Gonzalez, M.J. - Casanova, V.M. - Aceituno, F.J. - Scheggia, I. - Rives, J.-J. - Hintz, E.G. - Van Cauteren, P. - Helvaci, M. - Yesilyaprak, C. - Graham, K.A. - Král, L. - Kocián, R. - Kučáková, H. - Fauvaud, M. - Granslo, B.H. - Michelet, J. - Nicholson, M.P. - Vugnon, J.-M. - Kotková, Lenka - Truparova, K. - Ulusoy, G. - Yasarsoy, B. - Avdibegovic, A. - Blazek, M. - Kliner, J. - Zasche, P. - Bartosikova, S. - Vilasek, M. - Trondal, O. - Van Den Abbeel, F. - Behrend, R. - Wuecher, H.
The field high-amplitude SX Phe variable BL Cam: results from a multisite photometric campaign. II. Evidence of a binary - possibly triple - system.
Astronomy & Astrophysics. Roč. 515, June (2010), A39/1-A39/7. ISSN 0004-6361. E-ISSN 1432-0746
Výzkumný záměr: CEZ:AV0Z10030501
Klíčová slova: variables stars * BL Camelopardalis * oscillations
Obor OECD: Astronomy (including astrophysics,space science)
Impakt faktor: 4.410, rok: 2010

Interpreted as a light travel-time effect, the short- term O-C variation is indicative of a massive stellar component (0.46 to 1 M-circle dot) with a short period orbit (144.2 d), within a distance of 0.7 AU from the primary. More observations are needed to confirm the long-term O-C variations: if they were also to be caused by a light travel-time effect, they could be interpreted in terms of a third component, in this case probably a brown dwarf star (cca 0.03 M-circle dot), orbiting in similar to 3400 d at a distance of 4.5 AU from the primary.
Trvalý link: http://hdl.handle.net/11104/0193417