AAS 199th meeting, Washington, DC, January 2002
Session 91. Stellar Populations and Galactic Structure
Display, Wednesday, January 9, 2002, 9:20am-6:30pm, Exhibit Hall

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[91.19] Low Frequency Observations of the Galactic Field Centered on G29.7-0.3

C.K. Lacey (South Carolina), C.L. Brogan (NRAO), N. Kassim, T.J.W. Lazio, M. Nord (NRL)

We present wide-field Very Large Array (VLA) observations of the Galactic field centered on supernova remnant G29.7-0.3 at 330 and 74 MHz. These unique observations provide an unparalleled view of this rich, inner Galaxy field at high resolution and low frequency. This Galactic field enables a sensitive spectral index analysis of numerous sources when compared with existing higher frequency data. We present a preliminary catalog of objects in the field at 330 MHz, including analysis of the radio spectrum of G29.7-0.3, searching for turnovers in the spectrum caused by intervening low density ionized gas in the interstellar medium as was recently found towards the supernova remnant, W49B (Lacey et al. 2001, ApJ, 559, 954). This field is one of several inner Galaxy fields being surveyed at low frequency in an ongoing project using the new 74 MHz VLA system (see related poster by Brogan et al. 2001).

Basic research in radio astronomy at the Naval Research Laboratory is supported by the Office of Naval Research.

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