Dust Emission in M33 (HERM33ES)

Details Dust Emission in M33 (HERM33ES) Dust Emission in M33 (HERM33ES)

Jan 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011aas...21725003b&link_type=abstract

American Astronomical Society, AAS Meeting #217, #250.03; Bulletin of the American Astronomical Society, Vol. 43, 2011

Physics

Scientific paper

Dust emission is one of the main windows on the physics of galaxies and on star formation as the radiation from young, hot stars is absorbed by the dust
and reemitted at longer wavelengths. The recently launched Herschel now provides a view of dust emission in the
far-infrared at an unequaled resolution and quality up to 500 μm. In the context of the Herschel HERM33ES open time key project, we are studying the
moderately inclined, local group galaxy M33 located 840 kpc away. In this article, combining Spitzer and Herschel data ranging from 3.6 μm to 500 μm,
along with HI and Hα maps, we have studied the emission of the dust at the high resolution of 150 pc. Combining Spitzer and Herschel bands, we have
provided new estimators of the TIR and SFR. The study of the colors of the warm and cold dust temperatures shows that the temperature of the former is
dictated by young, massive stars at high SFR but it is taken over by the old population at lower SFR. Conversely, the temperature of the warm dust seems to
be tightly driven by the evolved stellar population.

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