A Search for clusters at high redshift I. Candidate Ly alpha emitters near1138-262 at z=2.2

Citation
Jd. Kurk et al., A Search for clusters at high redshift I. Candidate Ly alpha emitters near1138-262 at z=2.2, ASTRON ASTR, 358(1), 2000, pp. L1-L4
Citations number
21
Categorie Soggetti
Space Sciences
Journal title
ASTRONOMY AND ASTROPHYSICS
ISSN journal
00046361 → ACNP
Volume
358
Issue
1
Year of publication
2000
Pages
L1 - L4
Database
ISI
SICI code
0004-6361(200006)358:1<L1:ASFCAH>2.0.ZU;2-B
Abstract
Radio, optical and X-ray observations of the powerful radio galaxy PKS 1138 -262 at z = 2.156 have suggested that this galaxy is a massive galaxy in th e center of a forming cluster. We have imaged 1138-262 and the surrounding 38 square arcminute field with the Very Large Telescope(a) in a broad band and a narrow band encompassing the redshifted Ly alpha emission. We detect 50 objects with rest equivalent width larger than 20 Angstrom and a luminou s, highly extended Ly alpha halo around 1138-262. If the radio galaxy is at the center of a forming cluster, as observations at other wavelengths sugg est, these objects are candidate Ly alpha emitting cluster galaxies.