Karl G. Jansky VLA 3.6 cm Continuum and RRL Observations of the Galactic Massive Star Forming Region W49A
Abstract
We are using the VLA to make a multi-configuration study at 3.6 cm of the massive star forming region W49A. Using new observations from 2015, we have imaged W49A in the A, B, and D configurations in 3.6 cm continuum and H92α and H93α recombination line emission. We present initial continuum images, and selected line spectra of individual sources. This study is part of an ongoing campaign to search for variability in ultracompact HII regions, as predicted by models of unsteady accretion flows. Such variability has been detected in systematic searches of sources in the crowded Sgr B2 Main and North regions (De Pree et al., 2014, 2015). Deep VLA continuum and line observations were first made of W49A in 1993-94 in the B, C, and D configurations, and we will discuss preliminary comparisons of the new data with these 1993-94 archival data.
- Publication:
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American Astronomical Society Meeting Abstracts #227
- Pub Date:
- January 2016
- Bibcode:
- 2016AAS...22743604D