MUSICOS 1998: Observations of Rotational Modulation and Flares on the RS CVn Binary HR 1099

Details MUSICOS 1998: Observations of Rotational Modulation and Flares on the RS CVn Binary HR 1099 MUSICOS 1998: Observations of Rotational Modulation and Flares on the RS CVn Binary HR 1099

2001-09-15

arxiv.org/abs/astro-ph/0109235v1

Astronomy and Astrophysics

Astrophysics

6 pages, 3 figures, to appear in the proceedings of the 12th Cambridge Workshop on "Cool Stars, Stellar Systems, and the Sun"

Scientific paper

We present simultaneous and continuous observations of H_alpha, H_beta, NaI D_1, D_2, HeI D_3 and CaII 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 CaII H & K, H_beta and HeI D_3 and a strong filling-in of the NaI D_1, D_2 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.

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