For seminars and other local announcements, please subscribe to sfu-cosmo mailing list.
Tuesday, 5 December 2006, 13:00 in P8445B
Prof. Jasper Wall (UBC)
Submillimetre galaxies and star-formation in the early Universe
Submm galaxies recently have been discovered in significant numbers using SCUBA, the sub-millimetre common-user bolometer array on the James Clerk Maxwell Telescope, Hawaii. Their spectra closely resemble 30-40K black-body; they are believed to be dust-shrouded progenitor galaxies with the dust heated by UV radiation from early generations of stars. If this is so, then star-forming rates in each pre-galaxy must be prodigious, say 1000 solar masses per year. The present day equivalents are suggested to be the so-called ULIRGs, ultra-luminous IR galaxies, such as NGC 6240 or Arp 220, whose enormous star-formation rates are attributed to major galaxy mergers. At last we have a completely identified sample of 35 submm galaxies, and my talk will describe how this sample - despite its small size - has enabled us to learn much about the cosmic space distribution and evolution of this key population of proto-galaxies.
Seminars in 2006:
[ See complete seminar archives | iCal feed ]
Modified by Andrei Frolov <frolov@sfu.ca> on 2023-11-01