VLA observations of three high IR-luminosity IRAS galaxies

Details VLA observations of three high IR-luminosity IRAS galaxies VLA observations of three high IR-luminosity IRAS galaxies

Jan 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986a%26a...155l...3k&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 155, no. 1, Jan. 1986, p. L3-L5.

Astronomy and Astrophysics

Astronomy

5

Infrared Astronomy Satellite, Luminosity, Radio Galaxies, Radio Spectra, Stellar Evolution, Active Galaxies, Continuous Spectra, Extragalactic Radio Sources, Far Infrared Radiation, Galactic Nuclei, H Ii Regions, Spiral Galaxies, Starburst Galaxies

Scientific paper

Ground observations using the 20 cm NRAO VLA are made of three IRAS-detected galaxies with very high luminosities, very high internal absorptions, and emission-line spectra similar to those of the H II region type galaxies. The three sources, the galaxy ESO 494-16 of SBab type, an anonymous galaxy of peculiar morphology (Anony1), and another anonymous spiral galaxy of RS type (Anony2), have linear sizes of about 3, 10, and 6 kpc, and 6.3 cm flux densities of 8.9, 8.1, and 11.1 mJy, respectively. The radio sources for these galaxies are unresolved at 1.5 GHz and come from their respective central regions. A bolometric luminosity of 1.9 x 10 to the 12th L for both Anony1 and Anony2 place them in the class of Arp220 and NGC 6240, among the most luminous and active galaxies discovered by IRAS. The ratio of bolometric luminosity to 20 cm radio luminosity ranges from 2.5 - 4.6 x 10 to the 16th for the three galaxies, classifying them as very luminous starburst nucleus galaxies. The IRAS positions are in good agreement with peak intensity position of the VLA maps.

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