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- Centre National de la Recherche ScientifiqueFR348 papers
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- Thomas Jefferson National Accelerator FacilityUS290 papers
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6 papers · 2 filters
Structure and substructure analysis of DAFT/FADA galaxy clusters in the [0.4-0.9] redshift range
L. Guennou, C. Adami, F. Durret +29
We analyse the structures of all the clusters in the DAFT/FADA survey for which XMM-Newton and/or a sufficient number of galaxy redshifts in the cluster range is available, with th…
BBN And The CMB Constrain Light, Electromagnetically Coupled WIMPs
Kenneth M. Nollett, Gary Steigman
(Abridged) In the presence of a light WIMP (< 30 MeV), there are degeneracies among the nature of the WIMP, its couplings to standard model particles, its mass m_chi, and the numbe…
Black hole mass estimates and emission-line properties of a sample of redshift z>6.5 quasars
G. De Rosa, B. P. Venemans, R. Decarli +10
We present the analysis of optical and near-infrared spectra of the only four quasars known to date, discovered in the UKIDSS-LAS and VISTA-VIKING surveys. Our data-set con…
The Metallicity Dependence of the Cepheid P-L Relation in M101
Violet A. Mager, Barry F. Madore, Wendy L. Freedman
The impact of metallicity on the Cepheid Period-Luminosity (P-L) relation is investigated using HST ACS V and I images of M101. Variations in the reddening-free Wesenheit parameter…
Extreme-Velocity Quasar Outflows and the Role of X-ray Shielding
Fred Hamann, George Chartas, Sean McGraw +5
Quasar accretion disk winds observed via broad absorption lines (BALs) in the UV produce strong continuous absorption in X-rays. The X-ray absorber is believed to serve critically…
Stellar Velocity Dispersion Measurements in High-Luminosity Quasar Hosts and Implications for the AGN Black Hole Mass Scale
C. J. Grier, P. Martini, L. C. Watson +7
We present new stellar velocity dispersion measurements for four luminous quasars with the NIFS instrument and the ALTAIR laser guide star adaptive optics system on the Gemini Nort…