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43 papers · 1 filter
The XMM--NEWTON Omega Project: II.Cosmological implications from the high redshift L-T relation of X-ray clusters
S. C. Vauclair, A. Blanchard, R. Sadat +7
The evolution with redshift of the temperature-luminosity relation of X-ray galaxy clusters is a key ingredient to break degeneracies in the interpretation of X-ray clusters redshi…
Probable intermediate mass black holes in NGC4559: XMM-Newton spectral and timing constraints
Mark Cropper, Roberto Soria, Richard F. Mushotzky +3
We have examined X-ray and optical observations of two ultra-luminous X-ray sources, X7 and X10 in NGC4559, using XMM-Newton, Chandra and HST. The UV/X-ray luminosity of X7 exceeds…
Anisotropy in the Distribution of Satellite Galaxy Orbits
Alexander Knebe, Stuart P. D. Gill, Brad K. Gibson +3
Nearby clusters such as Virgo and Coma possess galaxy distributions which tend to be aligned with the principal axis of the cluster itself. This has also been confirmed by a recent…
The Intimate Link Between Accretion and BELR
F. Nicastro, A. Martocchia, G. Matt
In this paper I present evidence suggesting that the absence or presence of Hidden Broad Line Regions (HBLRs) in Seyfert 2 galaxies is regulated by the rate at which matter accrete…
The XMM--NEWTON Omega Project: I. The X-ray Luminosity - Temperature Relation at z>0.4
D. H. Lumb, J. G. Bartlett, A. K. Romer +9
(abridged) We describe XMM-Newton Guaranteed Time observations of a sample of eight high redshift (0.45<z<0.62) clusters. The goal of these observations was to measure the luminosi…
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…