Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21543122s&link_type=abstract
American Astronomical Society, AAS Meeting #215, #431.22; Bulletin of the American Astronomical Society, Vol. 42, p.366
Astronomy and Astrophysics
Astronomy
Scientific paper
Mid-infrared spectral features provide critical insights into the properties of the dust that heavily influences the observed spectral energy distribution of star-forming galaxies. Observations of nearby galaxies offer the opportunity to explore both the spatial and spectral properties at a level of detail that yields new clues regarding the composition and formation of the dust itself. This includes the ability to study both the bright compact sources that dominate our visual impression of galaxies, as well as inherently fainter diffuse emission. We present new and archival Spitzer IRS observations of HII and diffuse regions in M33, the nearest late type spiral. The resulting spectral and spatial resolution allow us to study the behavior of aromatic features with metallicity and hardness of the stellar radiation field as traced by atomic emission line features.
Barmby Pauline
Engelbracht Charles
Gordon Karl Douglas
Misselt Karl
Nagy Zoltan
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