HST Paschen-α Imaging of SINGS (Spitzer Infrared Nearby Galaxies Survey) Galaxies.

Details HST Paschen-α Imaging of SINGS (Spitzer Infrared Nearby Galaxies Survey) Galaxies. HST Paschen-α Imaging of SINGS (Spitzer Infrared Nearby Galaxies Survey) Galaxies.

May 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...204.4005c&link_type=abstract

American Astronomical Society Meeting 204, #40.05; Bulletin of the American Astronomical Society, Vol. 36, p.717

Astronomy and Astrophysics

Astronomy

Scientific paper

We present near-infrared images of the centers of 27 galaxies from the SINGS (the Spitzer Infrared Nearby Galaxies Survey) sample, obtained with HST/NICMOS in the H-band and Paschen-α line emission. The Paschen-α images provide nearly--extinction--insensitive maps of the massive star formation rate (SFR) in the dusty cores of the galaxies, while the H-band images trace the stellar mass distribution. We combine these data with ground--based Hα images to investigate: the degree to which existing Hα surveys have been biased by extinction; the properties of star formation in high--density (high--extinction) environments; and the luminosity function of the circumnuclear HII regions.
This project was funded by the NASA-HST grant GO-9360.

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