A New View of Galaxy Evolution from Submillimeter Surveys with SCUBA
Author: Sanders, D.B.
Source: Astrophysics and Space Science, Volumes 269-270, 1999 , pp. 381-389(9)
Abstract:Our view of galaxy evolution has been dramatically enhanced by the recent deep field submm surveys carried out with the SCUBA camera on the JCMT. SCUBA has discovered a population of luminous infrared galaxies at redshifts ∼ 1-4 that emit most of their energy at far-IR/submm wavelengths. The cumulative surface density of submm sources (∼ 10^4 deg^-2 with S_850 > 1 mJy) appears to be sufficient to account for nearly all of the 850 μm extragalactic background. The SCUBA sources are plausibly the high-z counterparts of more local (z ≲ 1) luminous infrared galaxies that have been identified in IRAS and ISO deep field surveys, the majority of which appear to be major mergers of gas-rich disks accompanied by dust-enshrouded nuclear starbursts and powerful AGN. The SCUBA sources are plausibly the progenitors of the present-day spheroidal population. This major event in galaxy evolution, equal in bolometric luminosity to that observed at optical wavelengths, is largely missed by current UV/optical surveys.
Document Type: Regular Paper
Affiliations: Institute for Astronomy, University of Hawaii, 2680 Woodlawn Drive, Honolulu, HI 96822, USA E-mail: email@example.com
Publication date: 1999-01-01