Spitzer Observations of the SCUBA/VLA Sources in the Lockman Hole: Star Formation History of Infrared-Luminous Galaxies
Abstract
We present Spitzer Space Telescope imaging observations at 3.6, 4.5, 5.8, 8.0, and 24 μm of the SCUBA submillimeter sources and μJy VLA radio sources in a 5'×5' area in the Lockman Hole East region. Out of the ~40 SCUBA/VLA sources in the field, Spitzer counterparts were detected for nearly all except for the few low-weight SCUBA detections. We show that the majority (80%-90%) of the detected sources are cold (i.e., starburst-like) infrared-luminous galaxies (LIR>1011 Lsolar) at redshift 0.5<z<3.5, whose star-formation rate density (SFRD) is comparable to that of the optically selected star-forming galaxies.
- Publication:
-
The Astrophysical Journal Supplement Series
- Pub Date:
- September 2004
- DOI:
- 10.1086/423322
- arXiv:
- arXiv:astro-ph/0406359
- Bibcode:
- 2004ApJS..154..130E
- Keywords:
-
- Cosmology: Observations;
- Galaxies: Evolution;
- Galaxies: High-Redshift;
- Infrared: Galaxies;
- Astrophysics
- E-Print:
- Accepted for publication in the ApJS Spitzer special issue