The temperature distribution of dense gas in starburst cores

Details The temperature distribution of dense gas in starburst cores The temperature distribution of dense gas in starburst cores

May 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005assl..329p..57o&link_type=abstract

Starbursts: From 30 Doradus to Lyman Break Galaxies, Held in Cambridge, UK, 6-10 September 2004. Edited by R. de Grijs and R.M.

Astronomy and Astrophysics

Astrophysics

Scientific paper

We present the first interferometric survey of ammonia in the cores of prominent, southern starburst galaxies. Six starburst galaxies were observed with the Australia Telescope Compact Array in both, the ammonia (1,1) and (2,2) metastable inversion lines: NGC 253, NGC 4945, M83, Cen A, NGC 1365, and Circinus. In all galaxies but Circinus ammonia is detected either in emission, in absorption, or both. The ratio of these ammonia lines is a powerful diagnostic to derive the rotational temperature and thus to constrain the excitation of the cool and dense molecular gas component -- the material which ultimately fuels starburst activity. We compare the total amount of dense molecular gas and its temperature distribution to the starburst and AGN activity in our sample of galaxies.

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