HD 51106 and HD 50747: an ellipsoidal binary and a triple system observed with CoRoT

被引：3

作者：

Dolez, N. ^{[1
]}

Vauclair, S. ^{[1
]}

Michel, E. ^{[2
]}

Hui-Bon-Hoa, A. ^{[1
]}

Vauclair, G. ^{[1
]}

Le Contel, D. ^{[3
]}

Mathias, P. ^{[3
]}

Poretti, E. ^{[4
]}

Amado, P. J. ^{[6
]}

Rainer, M. ^{[4
]}

Samadi, R. ^{[2
]}

Baglin, A. ^{[2
]}

Catala, C. ^{[2
]}

Auvergne, M. ^{[2
]}

Uytterhoeven, K. ^{[4
,5
]}

Valtier, J. -C. ^{[3
]}

机构：

[1] Univ Toulouse, CNRS, Lab Astrophys Toulouse Tarbes, F-31400 Toulouse, France

[2] Observ Paris, LESIA, FRE 2461, F-92195 Meudon, France

[3] Observ Cote Azur, CNRS, UMR 6525, Dpt Fizeau, F-06304 Nice, France

[4] Osserv Astron Brera, INAF, I-23807 Merate, Italy

[5] Univ Paris Diderot, Lab AIM, CEA, DSM,CNRS,IRFU,Ctr Saclay,SAp, F-91191 Gif Sur Yvette, France

[6] CSIC, Inst Astrofis Andalucia, E-18080 Granada, Spain

来源：

ASTRONOMY & ASTROPHYSICS | 2009年 / 506卷 / 01期

关键词：

stars: individual: HD 50747; stars: oscillations; stars: chemically peculiar; GAMMA-DORADUS; AM STAR; PHOTOMETRY; PULSATION;

D O I：

10.1051/0004-6361/200911903

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

Context. We present an analysis of the observations of HD 51106 and HD 50747 by the satellite CoRoT, obtained during its initial run, and of the spectroscopic preparatory observations. Aims. We complete an analysis of the light curve, extract the main frequencies observed, and discuss some preliminary interpretations about the stars. Methods. We used standard Fourier transform and pre-whitening methods to extract information about the periodicities of the stars. Results. HD 51106 is an ellipsoidal binary, the light curve of which can be completely explained by the tidal deformation of the star and smaller secondary effects. HD 50747 is a triple system containing a variable star, which exhibits many modes of oscillation with periods in the range of a few hours. On the basis of this period range and the analysis of the physical parameters of the star, we conclude that HD 50747 is gamma-Doradus star.

引用

页码：159 / 165

页数：7

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