Discovery of an Extremely Red Galaxy at z=0.65 with Dusty Star Formation and Nuclear Activity
Abstract
In the course of the follow-up multiwavelength study of a deep radio survey, we have discovered that the millijansky radio source PDF J011423 is a low-redshift (z=0.65) extremely red galaxy (ERG) with K=15.3, R-K=5.8, and J-K=3.1. Optical, infrared, and radio photometry, together with optical and near-infrared spectroscopy, reveal a heavily obscured galaxy (AV=5-6, from the observed Balmer decrement) undergoing vigorous star formation and presenting an active galactic nucleus. PDF J011423 is a representative member of the dusty ERG population, providing a local counterpart for studying more distant ERGs. Based on observations with the Infrared Space Observatory, Australia Telescope Compact Array, Anglo-Australian Telescope, Cerro Tololo Inter-American Observatory, and the European Southern Observatory (program 266.A-5633).
- Publication:
-
The Astrophysical Journal
- Pub Date:
- October 2001
- DOI:
- 10.1086/323939
- arXiv:
- arXiv:astro-ph/0108361
- Bibcode:
- 2001ApJ...559L.101A
- Keywords:
-
- Galaxies: Active;
- Galaxies: Individual: Alphanumeric: PDF J011423;
- Galaxies: Photometry;
- Galaxies: Starburst;
- Infrared: Galaxies;
- Radio Continuum: Galaxies;
- Astrophysics
- E-Print:
- 13 pages (including 2 encapsulated postscript figures), aastex, accepted for publication in ApJL