15 papers · 1 filter
Exploring the spreading layer of GX 9+9 using RXTE and INTEGRAL
P. Savolainen, D. C. Hannikainen, O. Vilhu +3
We have fitted ~200 RXTE and INTEGRAL spectra of the neutron star LMXB GX 9+9 from 2002-2007 with a model consisting of a disc blackbody and another blackbody representing the spre…
Future instrumentation for the study of the Warm-Hot Intergalactic Medium
F. B. S. Paerels, J. S. Kaastra, T. Ohashi +3
We briefly review capabilities and requirements for future instrumentation in UV- and X-ray astronomy that can contribute to advancing our understanding of the diffuse, highly ioni…
Nonthermal phenomena in clusters of galaxies
Y. Rephaeli, J. Nevalainen, T. Ohashi +1
Recent observations of high energy (> 20 keV) X-ray emission in a few clusters of galaxies broaden our knowledge of physical phenomena in the intracluster space. This emission is l…
Soft X-ray and extreme ultraviolet excess emission from clusters of galaxies
F. Durret, J. S. Kaastra, J. Nevalainen +2
An excess over the extrapolation to the extreme ultraviolet and soft X-ray ranges of the thermal emission from the hot intracluster medium has been detected in a number of clusters…
Clusters of galaxies: beyond the thermal view
J. S. Kaastra, A. M. Bykov, S. Schindler +13
We present the work of an international team at the International Space Science Institute (ISSI) in Bern that worked together to review the current observational and theoretical st…
Soft and hard X-ray excess emission in Abell 3112 observed with Chandra
M. Bonamente, J. Nevalainen, R. Lieu
Chandra ACIS-S observations of the galaxy cluster A3112 feature the presence of an excess of X-ray emission above the contribution from the diffuse hot gas, which can be equally we…