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9 papers · 1 filter
Evidence for Secular Evolution in Late-Type Spirals
S. Courteau, R. S. de Jong, A. H. Broeils
We combine deep optical and IR photometry for 326 spiral galaxies from two recent galaxy samples and report that the surface brightness profiles of late-type spirals are best fit b…
Gravitational collisions in cosmological N-body codes
Ivar Suisalu, Enn Saar
We study the accumulation of errors in cosmological N-body algorithms that are caused by representing the continuous distribution of matter by massive particles, comparing the PPPM…
The Deficit of Distant Galaxy Clusters in the RIXOS X-ray Survey
F. J. Castander, R. G. Bower, R. S. Ellis +8
Clusters of galaxies are the largest gravitationally bound systems and therefore provide an important way of studying the formation and evolution of the large scale structure of th…
Discovery of a Large Gravitational Arc in the X-ray Cluster A2280
I. M. Gioia, J. P. Henry, G. A. Luppino +6
This Letter presents the serendipitous discovery of a large arc in an X-ray selected cluster detected in the Rosat North Ecliptic Pole (NEP) survey. The cluster, associated with Ab…
The small-scale clustering power spectrum and relativistic decays
S. J. McNally, J. A. Peacock
We present constraints on decaying-particle models in which an enhanced relativistic density allows an Cold Dark Matter universe to be reconciled with acceptable values for t…
The X-ray properties of the merging galaxy pair NGC 4038/9 - the Antennae
A. M. Read, T. J. Ponman, R. D. Wolstencroft
We report the results of an X-ray spectral imaging observation of the Antennae with the ROSAT PSPC. 55% of the soft X-ray flux from the system is resolved into discrete sources, in…