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CIV Absorbers in z>4 Quasars: Tracing Early Galactic Halos Evolution
Celine Peroux, Patrick Petitjean, Bastien Aracil +2
We use 29 z>4 quasar spectra to build a homogeneous sample of high-redshift CIV absorbers. We use these data to calculate the number density, n(z), of W_rest(CIV)>0.30 A CIV double…
Serendipity and the SDSS: Discovery of the Largest Known Planetary Nebula on the Sky
Paul C Hewett, Michael J Irwin, Evan D Skillman +4
Investigation of spectra from the Sloan Digital Sky Survey reveals the presence of a region of ionized gas of >2 degrees diameter centered approximately at alpha = 10^h 37^m delta…
Detection of the Canis Major galaxy at (l;b)=(244;-8) and in the background of Galactic open clusters
M. Bellazzini, R. Ibata, L. Monaco +3
We report on the detection of Main Sequence stars belonging to the recently identified Canis Major galaxy in a field located at ~ 4.2 deg from the center of the stellar system. Wit…
The three dimensional structure of the giant stellar stream in Andromeda
A. W. McConnachie, M. J. Irwin, R. A. Ibata +3
The wide-field CCD camera at the CFH telescope was used to survey the giant stellar stream in the Andromeda galaxy, resolving stars down the red giant branch in M31 to I ~ 25, a ma…