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Title:
Molecular gas content of the primaeval galaxy IRAS 10214 + 4724
Authors:
Solomon, P. M.; Radford, S. J. E.; Downes, D.
Affiliation:
AA(New York, State University, Stony Brook), AB(Institut de Radioastronomie Millimetrique, St.-Martin-d'Heres, France), AC(Institut de Radioastronomie Millimetrique, St.-Martin-d'Heres, France)
Publication:
Nature (ISSN 0028-0836), vol. 356, March 26, 1992, p. 318, 319. (Nature Homepage)
Publication Date:
03/1992
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
COSMIC GASES, EMISSION SPECTRA, GALACTIC EVOLUTION, INFRARED ASTRONOMY, MOLECULAR GASES, CARBON MONOXIDE, HYDROGEN, LINE SPECTRA, MOLECULAR SPECTRA
DOI:
10.1038/356318a0
Bibliographic Code:
1992Natur.356..318S

Abstract

The mass of neutral molecular hydrogen in the faint IRAS source 10214 + 4724, one of the most intrinsically luminous objects in the universe, is estimated to be 2-6 x 10 exp 11 solar, which is comparable to the total mass of a large spiral galaxy and is consistent with the dynamical mass of the galaxy inferred from the CO emission linewidth. The IR/CO luminosity ratio of the galaxy is twice that of most IR-luminous galaxies and about 30 times higher than that of normal spirals. Its IR colors and high IR/CO luminosity ratio indicate that 10214 + 4724 is similar to nearby ultraluminous galaxies that are known to be merging. This galaxy is a primaeval molecular galaxy with the mass of a large spiral, but with most of the mass in molecular gas rather than stars.
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