Tuesday, January 25, 2005


Kravtsov et al. use N-body+gas dynamics simulations to investigate the effect of dissipation on the baryon fraction in clusters.

Soltan et al. cross-correlate the soft X-ray background (using ROSAT and XMM) with the positions of galaxies and detect a signal out to at least 1.5 Mpc. They interpret this as evidence for the WHIM since the signal is only seen at low energies.

Badenes et al. calculate X-ray emission spectra for shocked ejecta in SNIa.

Lui et al. find an HST counterpart for the ULX in NGC5204. The UV spectrum suggests a B0 1b supergiant overflowing its Roche lobe onto a compact primary.

Morris & Fabian analyse XMM observations of Abell 2597 and find evidence for a classical cooling flow with a rate of 100 solar masses/year.

Jeltema et al. use Chandra studies of clusters to investigate the evolution of structure with redshift. As expected they find higher redshift clusters to contain more substructure.

Hansen argues that temperatures observed in clusters are not true thermodynamic temperatures but are biassed by long-range interactions (eg gravity). The true temperature can be extracted from the spectrum or spectral line shapes.

Keywords: clusters, XRB, ULX, SNIa

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