Astronomy and Astrophysics – Astronomy
Scientific paper
Feb 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....95..398d&link_type=abstract
Astronomical Journal (ISSN 0004-6256), vol. 95, Feb. 1988, p. 398-407.
Astronomy and Astrophysics
Astronomy
9
Astronomical Spectroscopy, Infrared Spectra, Spiral Galaxies, Starburst Galaxies, Stellar Luminosity, Astronomical Catalogs, Infrared Astronomy Satellite, Interstellar Extinction, Radiant Flux Density, Spectral Energy Distribution
Scientific paper
The results of observations, using a variety of telescopes and techniques, of the bright IRAS source 17138 - 1017 are reported. Infrared photometry places the source of the far-infrared emission near the nucleus of an optically faint spiral galaxy identified on CCD images. Radio maps also show structure similar to that observed in the CCD images. The galaxy is at a red shift of about 0.018 and has a bolometric luminosity of about 2.5 x 10 to the 11th solar luminosities, about 30 times larger than that of a normal spiral galaxy. Spectroscopy of the galactic nucleus shows strong Br-alpha, Br-gamma, and H-alpha hydrogen recombination lines, with a derived Lyman-continuum photon rate of about 3 x 10 to the 54th/s. Molecular-hydrogen emission lines are absent. The high luminosity of the galaxy is considered to arise from large numbers of recently formed high-mass stars.
Becklin Eric E.
DePoy Darren L.
Hill Gary J.
Wynn-Williams C. G.
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