Center for Astrophysics Research and Technologies Seminar Series
Using Ammonia to Trace Methanol Masers near SNRs
Presented by Bridget McEwen
Ammonia, among other molecules, is reliably used to trace dense environments (Morris et al. 1983). The inversion transitions of ammonia, (1,1), (2,2), and (3,3), provide a vast amount of information concerning the morphology, kinematics, and the physical parameters of high density gas. In 2013, the NRAO Green Bank Telescope (GBT) was used to survey five SNRs (IC443, W44, W51C, G5.7-0.0, and G1.4-0.1) for 23.87 GHz ammonia (3,3) emission. Using the results from this study and a previous study by Pihlstrom et al. (2014), we aim to determine if ammonia (3,3) and methanol are coincident in the shocked SNR/molecular cloud regions. The peak positions of the ammonia can potentially be used to determine new 36 and 44 GHz methanol maser pointing positions in a future investigation. This is an initial part of a more extensive project to investigate the conditions of the molecular gas in SNR/molecular cloud interactions in order to determine physical parameters of SNRs, such as density and temperature, used in hadronic cosmic ray acceleration models.
2:00 pm, Thursday, April 17, 2014
PAIS-2540, PAIS
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