Hot molecular gas in the central region around Sgr A*

Details Hot molecular gas in the central region around Sgr A* Hot molecular gas in the central region around Sgr A*

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006jphcs..54...29m&link_type=abstract

"Journal of Physics: Conference Series, Volume 54, Proceedings of "The Universe Under the Microscope - Astrophysics at High Angu

Astronomy and Astrophysics

Astrophysics

2

Scientific paper

We present our latest Submillimeter Array (SMA) results on HCN(4-3) in the Sgr A* vicinity. We have produced a 37-pointing mosaic, covering a 2' × 2' area around Sgr A*. The angular resolution is 2.5'' and the spectral window covered the velocity range of -180 - 1490 km s-1. We compare our results to the HCN(1-0) observations from the Owens Valley Radio Observatory (OVRO) by [1]. Because of the higher excitation of the (4-3) transition, we find that absorption by lower density foreground material is not important. By comparing the (4-3) and (1-0) results, we find that the excitation is not uniform within the circumnuclear disk (CND). The southern part is stronger in the higher-excitation line. This result was previously suggested by single-dish observations from [2]. We discuss our results in the context of the structure and stability of the CND.

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