other query modes : |
Identifier query |
Coordinate query |
Criteria query |
Reference query |
Basic query |
Script submission |
TAP |
Output options |
Object types |
Help |
2002MNRAS.331..817S - Mon. Not. R. Astron. Soc., 331, 817-838 (2002/April-3)
The SCUBA 8-mJy survey - I. Submillimetre maps, sources and number counts.
SCOTT S.E., FOX M.J., DUNLOP J.S., SERJEANT S., PEACOCK J.A., IVISON R.J., OLIVER S., MANN R.G., LAWRENCE A., EFSTATHIOU A., ROWAN-ROBINSON M., HUGHES D.H., ARCHIBALD E.N., BLAIN A. and LONGAIR M.
Abstract (from CDS):
We detect 19 sources with signal-to-noise ratios (S/N)>4, and 38 with S/N>3.5. To assess both the completeness of this survey and the impact of source confusion as a function of flux density, we have applied our source-extraction algorithm to a series of simulated images. The result is a new estimate of the submm source counts over the flux-density range S850≃5-15mJy, which we compare with estimates derived by other workers, and with the predictions of a number of models.
Our best estimate of the cumulative source count at S850>8mJy is 320+80–100 per square degree. Assuming that the majority of sources lie at z >1.5, this result implies that the comoving number density of high-redshift galaxies forming stars at a rate in excess of 1000M☉.yr–1 is ≃ 10–5 Mpc–3, with only a weak dependence on the precise redshift distribution. This number density corresponds to the number density of massive ellipticals with L >3-4L * in the present-day Universe, and is also the same as the comoving number density of comparably massive, passively evolving objects in the redshift band 1<z <2 inferred from recent surveys of extremely red objects. Thus the bright submm sources uncovered by this survey can plausibly account for the formation of all present-day massive ellipticals. Improved redshift constraints, and ultimately an improved measure of submm source clustering can refine or refute this picture.
Abstract Copyright: 2002 Blackwell Science Ltd
Journal keyword(s): galaxies: evolution - galaxies: formation - galaxies: starburst - cosmology: observations - infrared: galaxies
Nomenclature: Table 5: [SFD2002] N2 NN (Nos 1-36). Table 6: [SFD2002] LHE NN (Nos 1-36).
Simbad objects: 88
To bookmark this query, right click on this link: simbad:2002MNRAS.331..817S and select 'bookmark this link' or equivalent in the popup menu