Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1991
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991natur.351..719r&link_type=abstract
Nature (ISSN 0028-0836), vol. 351, June 27, 1991, p. 719-721. SERC-supported research.
Astronomy and Astrophysics
Astronomy
249
Galactic Evolution, Infrared Astronomy Satellite, Quasars, Red Shift, Astronomical Spectroscopy, Emission Spectra, Lyman Alpha Radiation, Radio Spectra, Spectral Energy Distribution, Ultraviolet Spectra
Scientific paper
An emission line galaxy with the enormous far-IR luminosity of 3 x 10 to the 14th solar has been found at z = 2.286. The spectrum is very unusual, showing lines of high excitation but with very weak Lyman-alpha emission. A self-absorbed synchrotron model for the IR energy distribution cannot be ruled out, but a thermal origin seems more plausible. A radio-quiet quasar embedded in a very dusty galaxy could account for the IR emission, as might a starburst embedded in 1-10 billion solar masses of dust. The latter case demands so much dust that the object would probably be a massive galaxy in the process of formation. The presence of a large amount of dust in an object of such high redshift implies the generation of heavy elements at an early cosmological epoch.
Broadhurst Tom
Condon James J.
Conrow Tim
Efstathiou George P.
Ellis Richard S.
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