AAS 205th Meeting, 9-13 January 2005
Session 11 Brown Dwarfs and Exoplanets
Poster, Monday, January 10, 2005, 9:20am-6:30pm, Exhibit Hall

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[11.01] Radio Observations of Brown Dwarfs

L. C. Quick (NC A&T State University), R. Osten, T. Bastian (NRAO), S. Hawley (University of Washington)

Radio emission commonly signifies the presence of magnetic activity in the coronae of late-type stars, while emission from the H-alpha transition is a sign of magnetic activity in their chromospheres. Surveys of H-alpha emission from ultracool dwarfs of spectral types late M, L, and T have not shown this indicator of magnetic activity. As a result, it was believed that all magnetic activity declined in these cool bodies. Although sparse, the most recent detections of radio emission contradict this behavior. As part of a large VLA survey of nearby ultracool dwarfs out to 13pc, the aim of my research was to determine how common radio emission is in these late-type stars. Data from 9 L and T dwarfs was reduced, and evidence for emission was detected from three of these objects. This research was conducted as a part of the NRAO Summer Student program, with partial funding from the National Science Foundation.

The author(s) of this abstract have provided an email address for comments about the abstract: lcennette@msn.com

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© 2004. The American Astronomical Society.