Other
Scientific paper
Jan 2012
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21934107m&link_type=abstract
American Astronomical Society, AAS Meeting #219, #341.07
Other
Scientific paper
We present findings from an ammonia molecular line study of the Serpens South star-forming cluster, within the Serpens molecular cloud, performed using the K-band Focal Plane Array at the GBT. We have mapped a 40' by 30' area in the NH3 (1,1), (2,2) and (3,3) inversion transitions, as well as in HC7N 21-20. The NH3 (1,1) and (2,2) emission was used to derive kinetic temperatures across the region, which range from 7.5 K to 17.5 K. Despite a 10 K range of temperature for NH3, all of the HC7N was found within the 2 K range of 9.5 K and 11.5 K. We find the distribution of both molecules throughout the cloud is different, although the line-of-sight velocities agree well. The HC7N emission peaks do not coincide with peaks in NH3 emission, and we additionally find HC7N in areas with very low NH3 abundance. Where present, the abundance of HC7N is broadly consistent with previous studies of other carbon chain producing regions. Finally, we find self-absorbed HC7N emission towards several dense cores, with line profiles suggesting both infall and outflow motions. We fit the line profiles to determine infall and outflow velocities for these regions.
Bourke Tyler
di Francesco James
Friesen Rachel
Gutermuth Robert
Medeiros Lia
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