1999/08/10 by Patrick Hall, Patrick B. Hall, Hall, Patrick +9
Physics and Astronomy · #Astronomy and Astrophysical Research #Astrophysics (astro-ph) #FOS: Physical sciences #Galaxies: Formation, Evolution, Phenomena #Scientific Research and Discoveries #astro-ph
paper · pdf · doi:10.48550/arxiv.astro-ph/9908102
4 pages, 1 figure, to appear in ``The Hy-Redshift Universe: Galaxy Formation and Evolution at High Redshift," eds. A. J. Bunker & W. J. M. van Breugel (ASP: San Francisco)
arxiv created 1999/08/10 · openalex publication_date 1999/08/10 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We present new data on several z=1.54 radio-loud quasar fields from a sample of 31 at z=1-2 in which we have previously identified an excess population of predominantly red galaxies. Narrow-band H-alpha observations detect five candidate galaxies at the quasar redshifts in three fields totaling 10.156 arcmin2, a surface density 30 times higher than in previous surveys, even targeted ones. SCUBA observations of three fields detect at least one candidate quasar-associated galaxy. Many galaxies with SEDs indicating considerable dust are not detected, but the limits are only sufficient to rule out hyperluminous infrared galaxies. Finally, quantitative photometric redshifts and SED fits are presented for one "J-band dropout" galaxy with J-K>2.5 which is confirmed to be very dusty (E(B-V)~=0.5) and background to the quasar at >99.9% confidence.