POSTER PAPER 7.02
MUSICOS 1998: Observations of Rotational Modulation and Flares on the RS CVn Binary HR1099
D. Garcia-Alvarez, B.H. Foing, D. Montes, J. Oliveira, J.G. Doyle, and MUSICOS 98 collaboration
Institute: Armagh Observatory
Institute: ESA Space Science Department, ESTEC
Institute: Departamento de Astrofisica, Universidad Complutense de Madrid
Institute: Centro de Astrofisica da Universidade do Porto
Contact Email: dga@star.arm.ac.uk
Abstract:
We present simultaneous and continuous observations of H alpha,
H beta, Na I D1 , D2 , He I D3 and Ca II H & K lines
of the chromospherically active binary HR 1099.
We have observed HR 1099 for more than 3 weeks almost continuously and
monitored two flares.
An increase in H alpha and Ca II H & K, H beta and
He I D3 and a strong filling-in of the Na I D1 , D2 during the flares are observed.
We have found that the flares took place at the same phase
(0.85) of the binary orbit, and both of them seems to occur near the limb.
Index Keywords: HR 1099
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Manuscript submitted: 2001-Sep-06
"The Future of Cool-Star Astrophysics", 2003, Eds. A. Brown,
G. M. Harper, & T. R. Ayres.
Proceedings of 12th Cambridge Workshop on Cool Stars, Stellar Systems,
& The Sun,
© 2003 University of Colorado.