GBT Measurements of the Physical Properties of the Sgr B2 Region

Details GBT Measurements of the Physical Properties of the Sgr B2 Region GBT Measurements of the Physical Properties of the Sgr B2 Region

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21940901l&link_type=abstract

American Astronomical Society, AAS Meeting #219, #409.01

Astronomy and Astrophysics

Astronomy

Scientific paper

We present NRAO GBT observations of ammonia 1-1 and 2-2 emission in the Sgr B2 region, in order to estimate the physical temperature of this region. The observations were made with the 7-beam K-band Focal Plane Array (KFPA) collecting spectra over a 11' by 9' region.
We compare these observations with molecular line spectra obtained with the GBT in the frequency range 12.4 to 15.0 GHz. In this frequency range, Hydrogen α, β, and γ recombination lines, Helium α recombination lines and emission from the SO molecule are detected. Molecular absorption lines from OH, H2CO and CH3CO are detected at velocity 62×3 km/sec. Measurements of the line widths and intensities are presented for the central region of Sgr B2.

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