A new large sample of ultraluminous IRAS galaxies

Details A new large sample of ultraluminous IRAS galaxies A new large sample of ultraluminous IRAS galaxies

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996mnras.279..459c&link_type=abstract

Monthly Notices of the Royal Astronomical Society, Volume 279, Issue 2, pp. 459-476.

Astronomy and Astrophysics

Astronomy

65

Galaxies: Active, Galaxies: General, Infrared: Galaxies

Scientific paper

We present a new, large sample of ultraluminous (L_60<~10^11.4 L_solar for H_0=100 km s^-1 Mpc^-1) IRAS galaxies selected from the IRAS Faint Source Survey using a novel optical far-infrared colour selection criterion. Our technique proves to be very successful in selecting luminous galaxies, and we present data on 91 ultraluminous objects, of which 65 are newly discovered. Using our redshift spectra and information from the literature we find that at least 35 per cent of these objects are likely to contain an AGN-type central engine. We also find that purely IR-based techniques for determining the presence of an AGN in these objects are unreliable.

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