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Selection of Metal-poor Giant Stars Using the Sloan Digital Sky Survey Photometric System
A. Helmi, Z. Ivezic, F. Prada +10
We present a method for photometric selection of metal-poor halo giants from the imaging data of the Sloan Digital Sky Survey (SDSS). These stars are offset from the stellar locus…
A Chandra study of X-ray sources in the field of the z=2.16 radio galaxy MRC 1138-262
L. Pentericci, J. D. Kurk, C. L. Carilli +3
We present results from a Chandra X-ray Observatory study of the field X-ray source population in the vicinity of the radio galaxy MRC 1138-262. Many serendipitous X-ray sources ar…
Giant low surface brightness halos in distant radio galaxies: USS0828+193
M. Villar-Martin, J. Vernet, S. di Serego Alighieri +5
We present results on the spectroscopic study of the ionized gas in the high redshift radio galaxy USS0828+193 at z=2.57. Thanks to the high S/N of the emission lines in the Keck s…
Unusual Broad Absorption Line Quasars from the Sloan Digital Sky Survey
Patrick B. Hall, S. F. Anderson, M. A. Strauss +6
The Sloan Digital Sky Survey has confirmed the existence of populations of broad absorption line (BAL) quasars with various unusual properties. We present and discuss twenty-three…
The most distant structure of galaxies known: a protocluster at z=4.1
B. P. Venemans, J. D. Kurk, G. K. Miley +8
Imaging and spectroscopy with the Very Large Telescope have revealed 20 Lyman-alpha emitters within a projected distance of 1.3 Mpc and 600 km/s of the luminous radio galaxy TN J13…