Dust Distribution in the Spiral Galaxy M51

Details Dust Distribution in the Spiral Galaxy M51 Dust Distribution in the Spiral Galaxy M51

Mar 2008

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2008aspc..381..132b&link_type=abstract

The Second Annual Spitzer Science Center Conference: Infrared Diagnostics of Galaxy Evolution. ASP Conference Series, Vol. 381,

Astronomy and Astrophysics

Astronomy

1

Scientific paper

We present the analysis of far-infrared imaging of the nearby grand design spiral galaxy M51. Being close enough for the spiral structure to be resolved, it is possible to determine the dust temperature and distribution as a function of galactocentric radius. Using Spitzer/MIPS data at 70 μm and 160 μm in concert with a deep 350 μm image taken with the Submillimeter High Angular Resolution Camera (SHARC-II) at the Caltech Submillimeter Observatory (CSO), we have mapped the dust emission. Additional SCUBA 850 μm data help determine the overall dust spectrum. We derive the nuclear and spiral arm dust mass and temperatures (30 K in the nucleus, 25 K in the disk) and measure the emissivity index (β=1.3).

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