NOAO >   Observing Info >   Approved Programs >   2002A-0150

Small NOAO Logo

Proposal Information for 2002A-0150


PI: Min S. Yun, University of Massachusetts, myun@astro.umass.edu
Address: LGRT B-522, Amherst, MA 01003, USA

CoI: Dave Sanders, IfA, the University of Hawaii
CoI: Kimiaki Kawara, IoA, the University of Tokyo
CoI: Shinki Oyabu, IoA, the University of Tokyo
CoI: Yoshiaki Taniguchi, Dep. of Astronomy, Tohoku University
CoI: Takashi Murayama, Dep. of Astronomy, Tohoku University
CoI: Yasunori Sato, IoA, the University of Tokyo

Title: Spectroscopic investigation of the ISO far-IR (175(micron) & 95(mu)m) sources

Abstract: We propose to carry out spectroscopic observations of a large sample of far-infrared (FIR) sources identified in the deep Infrared Space Observatory far-infrared survey of the Lockman Hole region using HYDRR on the WIYN telescope. A comparison of the ISOPHOT sources with radio and X-ray data suggests that most of the FIR sources are star-forming galaxies rather than AGNs. The number density of ISOPHOT sources exceeds the predictions of the star formation evolution models based on optical data. Substantial dust obscuration of star forming activity may be occurring even at modest redshifts, where most of these ISOPHOT sources are expected to be located. Our proposed multi-object spectroscopy with HYDRR will help determine the redshifts and luminosity for the bulk of the ISOPHOT sources. \bf Our proposed WIYN observations will enable us for the first time to constrain the contribution of far-infrared galaxies to the star formation history of the Universe over the important redshift range z=0-1.5 where the SFR appears to increase by as much as a factor of 20-100 compared to the current epoch, and where as much as 50-80% of the luminosity is hidden by dust.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



NOAO >   Observing Info >   Approved Programs >   2002A-0150

noaoprop-help@noao.edu

Small NOAO Logo