The Relationship Between PAHs and the Interstellar Medium

Details The Relationship Between PAHs and the Interstellar Medium The Relationship Between PAHs and the Interstellar Medium

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.6313m&link_type=abstract

American Astronomical Society Meeting 205, #63.13; Bulletin of the American Astronomical Society, Vol. 37, p.373

Astronomy and Astrophysics

Astronomy

Scientific paper

The question as to whether polycyclic aromatic hydrocarbon (PAH) emission traces star formation or ISM content is still an open one. We investigate the relationship between PAHs and the ISM using data from the Spitzer Infrared Nearby Galaxy Survey (SINGS). In particular, we make point-to-point comparisions of continuum subtracted 8 micron emission with tracers of the ISM including stellar extinction and CO. These comparisons span a range of environments, from the strong UV fields surrounding high star formation regions, to the less active interarm environments of spiral galaxies where a more diffuse PAH component is seen. The observed relationships are presented for NGC 0628, NGC 3627, NGC 4736, NGC 5194 and NGC 6946, these galaxies selected from the SINGS sample to span a range of morphologies from Sab to Scd.

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