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Coronal Variability and Flaring of the RS CVn Binaries σ2 CrB and HR1099

Published online by Cambridge University Press:  25 May 2016

A. Brown ,
R. A. Osten ,
S. A. Drake ,
K. L. Jones  and
R. A. Stern
A. Brown
Affiliation:
CASA, U. of Colorado, Boulder, CO 80309-0389, USA
R. A. Osten
Affiliation:
CASA, U. of Colorado, Boulder, CO 80309-0389, USA
S. A. Drake
Affiliation:
HEASARC, NASA/GSFC, Greenbelt, MD 20771, USA
K. L. Jones
Affiliation:
Dept. of Physics, U. of Queensland, Brisbane, Australia
R. A. Stern
Affiliation:
Lockheed-Martin SAL, Palo Alto, CA 94304, USA

Extract

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We present new X-ray, EUV, and radio observations of the coronal emission from the RS CVn binaries HR1099 (V711 Tau) and σ2 CrB. RS CVn systems possess coronae that display extreme activity levels and frequent flaring. Our observations provide multiwavelength records of coronal variability and flaring over more than two binary orbits for each system. While the EUV and X-ray spectra show the flare response of the thermal plasma, the radio data give the corresponding information for the nonthermal electron population. The HR1099 data contain one of the most energetic flare outbursts observed from HR1099 that lasts for over 3 days. Coronal flaring is common in these systems and, in fact, is the normal condition.

Type
Session 1: Plasma and Fresh Nucleosynthesis Phenomena
Information
Symposium - International Astronomical Union , Volume 188: The Hot Universe , 1998 , pp. 215 - 216
Copyright
Copyright © Kluwer 1998