AAS 199th meeting, Washington, DC, January 2002
Session 89. Young Stars - Surveys, Associations and Binaries
Display, Wednesday, January 9, 2002, 9:20am-6:30pm, Exhibit Hall

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[89.02] Radio Observations of the TW Hya Association

M. J Claussen (NRAO), D. J. Wilner (SAO)

We report on 1) a survey of the members of the TW Hya association for radio emission at 8.5 GHz, 2) a sensitive broad-band radio spectrum from 1.4 to 15.0 GHz of TW Hya itself, and 3) bi-monthly monitoring of the radio emission from TW Hya using the NRAO VLA. Five out of eleven targets of the association members were easily detected at flux densities similar to that of TW Hya itself. The radio spectral index of the emission from TW Hya between 8.5 and 15.0 GHz is 0.8±0.6, consistent with partially thick thermal free-free emission. We will discuss the nature of the cm-wave radio emission from members of the TW Hya association in terms of plausible physical mechanisms such as ionized winds and gyrosynchrotron activity.

The NRAO is a facility of the National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

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

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