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The sub-DLA toward HE0001-2340: galaxy formation at z=2
P. Richter, C. Ledoux, P. Petitjean +1
We present a detailed analysis of chemical abundances in a sub-damped Ly alpha absorber (sub-DLA) at z=2.187 towards the quasar HE0001-2340 (z_em=2.28) using VLT/UVES data. This su…
Infrared Number Counts of AGN in the GOODS Fields
E. Treister, C. Megan Urry, the GOODS AGN Team
Using the known numbers and evolution of unobscured AGN, and assuming that there is a large number of corresponding obscured AGN -- as expected if AGN unification is correct -- we…
XMM-Newton observations of the Lockman Hole : Spectral analysis
V. Mainieri, J. Bergeron, P. Rosati +2
We present the results of the X-ray spectral analysis of the deep survey obtained with the XMM-Newton observatory on the Lockman Hole. The X-ray data and the cumulative source coun…
Chandra Deep Field South: The 1Msec Catalog
R. Giacconi, A. Zirm, J. Wang +15
In this Paper we present the source catalog obtained from a 942 ks exposure of the Chandra Deep Field South (CDFS), using ACIS-I on the Chandra X-ray Observatory. Catalog generatio…
Ly-alpha absorbers at z<1 : HST-CFHT imaging and spectroscopy in the field of 3C 286
V. Le Brun, J. Bergeron
We present further observational results on our Lya-only absorber identification project at low and intermediate redshifts. We combine CFHT/MOS imaging and spectroscopic observatio…
Are Damped Lyman alpha Systems Rotating Disks ?
Cedric Ledoux, Patrick Petitjean, Jacqueline Bergeron
We report on high spectral resolution observations of five damped Lyman alpha systems whose line velocity profiles and abundances are analyzed. By combining these data with informa…