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49 papers · 1 filter
Cosmological parameters estimation in the Quintessence Paradigm
M. Douspis, A. Riazuelo, Y. Zolnierowski +1
We present cosmological parameter constraints on flat cosmologies dominated by dark energy using various cosmological data including the recent Archeops angular power spectrum meas…
Are X-ray flashes a peculiar class of (soft) gamma-ray bursts ?
Frederic Daigne, Celine Barraud, Robert Mochkovitch
Heise et al. (2001) have reported the identification of a new class of sources by Beppo-SAX, the so-called X-ray flashes (XRFs), which have many common properties with gamma-ray bu…
A radial mass profile analysis of the lensing cluster MS2137-23
R. Gavazzi, B. Fort, Y. Mellier +2
We reanalyze the strong lens modeling of the cluster of galaxies MS2137-23 using a new data set obtained with the ESO VLT. We found the photometric redshifts of the two main arc sy…
Major Mergers of Haloes, Growth of Massive Black Holes and Evolving Luminosity Function of Quasars
Evanthia Hatziminaoglou, Guy Mathez, Jose-Maria Solanes +2
We construct a physically motivated analytical model for the quasar luminosity function, based on the joint star formation and feeding of massive black holes suggested by the obser…
The Most Massive Clusters in the Universe
Oliver Czoske, Jean-Paul Kneib, Sebastien Bardeau
Clusters of galaxies need to be investigated using complementary approaches combining all currently available observational techniques (X-ray, gravitational lensing, dynamics, SZ)…
Detached double-lined eclipsing binaries as critical tests of stellar evolution : Age and metallicity determinations from the HR diagram
E. Lastennet, D. Valls-Gabaud
Detached, double-lined spectroscopic binaries which are also eclipsing provide the most accurate determinations of stellar mass, radius, temperature and distance-independent lumino…