HEAD 2000, November 2000
Session 42. Stars and Stellar Coronae
Display, Friday, November 10, 2000, 8:00am-6:00pm, Bora Bora Ballroom

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[42.14] Coordinated Observations of the Active Binary \sigma2 CrB with Chandra, EUVE, and the VLA

R. A. Osten, A. Brown, T. R. Ayres (CASA, University of Colorado), A. Krishnamurthi, J. L. Linsky (JILA, University of Colorado)

We report on coordinated observations of the short-period active binary \sigma2 CrB (F6V + G0V, P\rm orb=1.14 d) taken with the Chandra X-ray Observatory, the Extreme Ultraviolet Explorer, and the Very Large Array. EUVE observations span more than 7 orbital periods of the system. Centered in the middle of the nine day EUVE observation is a Chandra ACIS-S+HETGS grating observation lasting 85 ks and an overlapping 12 hour multifrequency VLA observation. We discuss the coronal variability, present high-resolution X-ray spectra and preliminary analysis including the search for flares, and tie the thermal high temperature emission together with nonthermal coronal emission.

RAO acknowledges funding from a NASA GSRP fellowship, grant NGT5-50241. AB and TRA acknowledge funding from NASA grant NAG5-3226, and JLL acknowledges support from NASA through grants S-56500-D and H-04630D.

The author(s) of this abstract have provided an email address for comments about the abstract: raosten@casa.colorado.edu

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