H2S in the Starburst Galaxy NGC 253

Details H2S in the Starburst Galaxy NGC 253 H2S in the Starburst Galaxy NGC 253

Dec 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007msl..confe..29m&link_type=abstract

"Molecules in Space and Laboratory, meeting held in Paris, France, May 14-18, 2007. Editors: J.L. Lemaire, F. Combes. ISBN: 9782

Astronomy and Astrophysics

Astrophysics

Observations

Scientific paper

The H2S 2(2,0)-2(1,1) and SO 5(5)-4(4) transitions were observed simultanesously toward the starburst galaxy NGC 253 using the Submillimeter Array. Two H2S emission peaks are found at positions ~2" NE (30 pc) and ~5" SW (80 pc) from the galactic center, associated with the circumnuclear disk and coinciding with the inner ring structure seen on previous SiO map. Given the high energy of the H2S 2(2,0) level and the derived high rotational temperature, we suggest that the H2S emission traces the on-going star formation through hot core activity. A rough comparison with the massive star forming region Orion KL would imply that several thousands of Orion KL-like cores may exist towards each of the H2S peaks.

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