Infrared and Optical Study of Faint IRAS-FSC Sources

Details Infrared and Optical Study of Faint IRAS-FSC Sources Infrared and Optical Study of Faint IRAS-FSC Sources

Nov 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010vaoa.conf..231s&link_type=abstract

"Evolution of Cosmic Objects through their Physical Activity, Proceedings of the Conference dedicated to Viktor Ambartsumian's 1

Physics

Scientific paper

Extragalactic sources from the IRAS Faint Source Catalog (FSC) which have the optically faintest magnitudes (E>18) were selected by spatial coincidence with a source in the FIRST radio survey, and 28 of these sources have been observed with the Infrared Spectrograph on Spitzer (IRS). The sources luminosities encompass the range from local ULIRGs to the most luminous sources discovered by Spitzer at z~2. Detectable PAH features are found in 15 of the sources (54%), and measurable silicate absorption are present in 19 sources (68%); both PAH emission and silicate absorption are present in 11 sources. PAH luminosities are used to determine the SB fraction of bolometric luminosity, and model predictions for a dusty torus are used to determine the AGN fraction of luminosity in all sources based on ?L? (5.5 mum). The ratio of infrared to radio flux, defined as q=log[fnu(25mum)]/[fnu(1.4Ghz)], does not distinguish between AGN and SB for these sources.

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