Far-infrared excesses from E/S0 galaxies with compact radio cores

Details Far-infrared excesses from E/S0 galaxies with compact radio cores Far-infrared excesses from E/S0 galaxies with compact radio cores

Nov 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986apj...310l..11w&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X), vol. 310, Nov. 1, 1986, p. L11-L14.

Astronomy and Astrophysics

Astronomy

21

Extragalactic Radio Sources, Far Infrared Radiation, Galactic Nuclei, Infrared Sources (Astronomy), Cosmic Dust, Infrared Astronomy Satellite, Nonthermal Radiation

Scientific paper

Ten optically bright E/S0 galaxies with compact, nonthermal radio cores observed with IRAS are discussed. Four galaxies (NGC 1052, NGC 2911, NGC 3998, NGC 4278) are detected in at least two IRAS bands. These four show color temperatures between 100 and 60 microns of about 25-30 K and large far-infrared (FIR) excesses. Their FIR emission is not a smooth extrapolation of the compact radio core spectrum. A thermal, rather than nonthermal, interpretation of the FIR excess is favored, primarily because of the unusually H I-rich and dusty nature of these four E/S0's. The ratio of the H I mass to the infrared luminosity is remarkably similar among the four, which could imply a narrow range in the ratios of neutral gas mass to dust mass.

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