The Structure Of The Dust Extinction In M51: Where Are The GMCs?

Details The Structure Of The Dust Extinction In M51: Where Are The GMCs? The Structure Of The Dust Extinction In M51: Where Are The GMCs?

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21724612r&link_type=abstract

American Astronomical Society, AAS Meeting #217, #246.12; Bulletin of the American Astronomical Society, Vol. 43, 2011

Astronomy and Astrophysics

Astronomy

Scientific paper

We present an HST NICMOS mosaic of M51 taken with the F160W (H-band) filter. We combine this near-infrared image with a optical ACS image to create a high resolution image of the dust extinction in M51. The high signal to noise and resolution of this color map allows us to investigate the morphology of the interstellar medium in M51 with a spatial dynamic range that reveals structures ranging in size from 10 pc to a kiloparsec.
The color map shows that the majority of the dust in M51 is distributed in linear structures, either in the spiral arm dust lanes or in one of the many spurs that connect to the spiral arm dust lanes. What is striking is the difference in this morphology and the millimeter interferometer maps of M51 which show the molecular gas concentrated into giant molecular clouds.

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