Unbiased chemical classification of galaxies

Details Unbiased chemical classification of galaxies Unbiased chemical classification of galaxies

Apr 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007atnf.prop..858m&link_type=abstract

ATNF proposal M239, Semester: April, 2007

Physics

Extragalactic, Mopra

Scientific paper

The recently published 2mm line survey of NGC253 has shown how spectral line surveys are powerful tools to get an understanding of the heating mechanisms and physical conditions of molecular material in the nuclei of galaxies. We propose to extend such studies not only to the brightest starbursts, but to different prototypical galaxies so we can really establish a chemical differentiation of the variety of environments we find in the extragalactic interestellar medium. This is a fundamental step to understand how the molecular material in the nuclei of galaxies is affected by the dominating heating mechanisms on the differents types of galaxies. Moreover, it opens up the possibility of classifying the galaxies according to this observed chemistry. This is specially important to characterized the dominant heating mechanism for the newly detected Submillimeter Galaxies which are heavily obscured even in the mid-IR. The currently available 8 GHz instantaneous bandwidth observable with MOPRA makes it an unique telescope to carry out these studies where large instantaneous bandwidths are required.

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