74 citations · 74 across the 7 of their papers we have counts for
14 papers
SMC: Stellar Populations through deep CMDs
Noelia E. D. Noel, Carme Gallart, Edgardo Costa +1
We present deep color-magnitud diagrams (CMDs) reaching the oldest main-sequence turnoffs for 12 fields in the SMC. The {\it B}-band and {\it R}-band observations were performed us…
AGN Unification and the X-ray Background
Ezequiel Treister, C. M. Urry
Active Galactic Nuclei (AGN) unification, which implies a large number of obscured AGN, can explain the optical, infrared and X-ray content of deep multiwavelength surveys. Here, w…
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…
Searching for White and Brown Dwarfs in the frame of the MUSYC/CYDER survey
M. Altmann, R. A. M'endez, M. -T. Ruiz +4
MUSYC (MUltiwavelength Survey by Yale and Chile), and its predecessor, the CYDER (Cal'an Yale Deep Extragalactic Research) survey are both deep multiwavelength surveys mainly aimin…
Close Companions to Nearby Young Stars from Adaptive Optics Imaging on VLT and Keck
Karl E. Haisch, Ray Jayawardhana, Alexis Brandeker +1
We report the results of VLT and Keck adaptive optics surveys of known members of the Eta Chamaeleontis, MBM 12, and TW Hydrae (TWA) associations to search for close companions. Th…
Disentangling microlensing and differential extinction in the double QSO HE0512-3329
O. Wucknitz, L. Wisotzki, S. Lopez +1
We present the first separate spectra of both components of the small-separation double QSO HE0512-3329 obtained with HST/STIS in the optical and near UV. The similarities especial…