The Revealing Dust: Mid-infared Diagnostics of Nuclear Activity in Hickson Compact Groups

Details The Revealing Dust: Mid-infared Diagnostics of Nuclear Activity in Hickson Compact Groups The Revealing Dust: Mid-infared Diagnostics of Nuclear Activity in Hickson Compact Groups

Dec 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006aas...20911101g&link_type=abstract

2007 AAS/AAPT Joint Meeting, American Astronomical Society Meeting 209, #111.01; Bulletin of the American Astronomical Society,

Astronomy and Astrophysics

Astronomy

Scientific paper

The multiple and ongoing gravitational interactions in compact galaxy groups make this setting eminently suitable for studying the influence of environment on nuclear activity. We present a sample of 12 nearby Hickson Compact Groups with a complete suite of 3.6-24 micron Spitzer imaging. Mid-infrared nuclear photometry is a sensitive tracer of dust heated by the ionizing continuum of hot stars or active galactic nuclei. We compare mid-infrared diagnostics of nuclear activity to optical line identifications in the literature, and discuss the challenges of distinguishing the source of ionizing radiation in these galaxies.
This project is supported by the Spitzer Science Center.

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