22 February 2001CfA Colloquium


Title: Dusty Corners of the Universe

Speaker: Douglas Scott

Abstract: The sub-mm waveband has opened up for cosmology, and through this window we can hope to glimpse some answers to a number of related puzzles:

What are the brightest sub-mm galaxies?

What sorts of galaxies make up the Far-IR Background (FIB)?

When did the Universe form the bulk of its stars?

How important is dust obscuration for obtaining a full star-formation census?

I will describe some results from observations using the SCUBA instrument on the James Clerk Maxwell Telescope. Our group has obtained counts of sources through cluster lenses, has targetted specific objects such as Lyman-break galaxies and sources discovered by ISO, and has made a large map of the Hubble Deep Field flanking fields region. I will also describe a balloon-borne experiment, BLAST, which addressed similar science goals, and has its first flight scheduled for next year.

Reference for students: Scott, D., Borys, C., Halpern, M., Sajina, A., Chapman, S., & Fahlman, G. "Known and unknown SCUBA sources", 2000, UMass/INAOE conference proceedings on Deep Millimeter Surveys, astroph/0010337

Lunch with the students will be on Thursday, February 22 at 12:30 in A-101.