Birth and Death in the M33 Galaxy

Details Birth and Death in the M33 Galaxy Birth and Death in the M33 Galaxy

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543120p&link_type=abstract

American Astronomical Society, AAS Meeting #215, #431.20; Bulletin of the American Astronomical Society, Vol. 42, p.365

Astronomy and Astrophysics

Astronomy

Scientific paper

The M33 galaxy is an excellent subject for the study of a wide range of evolutionary phenomena across a large spatial extent. The galaxy is a similar type to the Milky Way (Sc), spans a large area (almost a degree), and is at a favorable inclination (55 degrees). In addition, IR observations have the ability to penetrate the bands of dust in the galaxy disk and both reveal new sources and clarify the nature of obscured sources.
We obtained Spitzer Space Telescope multi-epoch IR imaging and targeted spectroscopy of several sources of uncertain classification. Based upon our observations and multi-wavelength archival photometry and imaging, we tentatively classify these sources as evolved stars, SNR, or star formation regions.
These observations are unique in that the distance of M33 (800 kpc) and the faintness of the sources (a few milli-Jy) make ground-based mid-IR spectroscopy impossible.
This work is based upon observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology under NASA contract 1407. The authors were supported in part through contracts 1256406 and 1215746 issued by JPL/Caltech to the University of Minnesota.

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