Astronomy and Astrophysics – Astrophysics
Scientific paper
1998-08-11
Astrophys.J. 506 (1998) L7-L10
Astronomy and Astrophysics
Astrophysics
6 pages including 2 figures Accepted: ApJ Letters, 11 Aug. 1998
Scientific paper
10.1086/311639
We report the detection of CO(3-2) emission from the submillimeter-selected hyperluminous galaxy SMM 02399-0136. This galaxy is the brightest source detected in the recent SCUBA surveys of the submillimeter sky. The optical counterpart of the submillimeter source has been identified as a narrow-line AGN/starburst galaxy at z=2.8. The CO emission is unresolved, theta < 5 arcsec, and is coincident in redshift and position with the optical counterpart. The molecular gas mass derived from the CO observations is 8x10^{10} h_{75}^{-2} M_{sun}, after correcting for a lensing amplification factor of 2.5. The large CO luminosity suggests that a significant fraction of the infrared luminosity of SMM 02399-0136 arises from star formation. The high inferred star-formation rate of 10^{3} M_{sun}/yr and the large gaseous reservoir may suggest that we are seeing the formation phase of a massive galaxy. Future CO observations of other galaxies detected in deep submillimeter surveys will test the generality of these conclusions for the bulk of the faint submillimeter population.
Blain Andrew W.
Evans Aaron S.
Frayer Dave T.
Ivison Rob J.
Kneib Jean Paul
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