Chandra Observation of Abell 2142: Survival of Dense Subcluster Cores in a Merger
- M. Markevitch, T. Ponman, P. Zhao
- Physics
- 14 January 2000
We use Chandra data to map the gas temperature in the central region of the merging cluster A2142. The cluster is markedly nonisothermal; it appears that the central cooling flow has been disturbed…
High-Resolution X-Ray Spectroscopic Constraints on Cooling-Flow Models for Clusters of Galaxies
- J. Peterson, S. Kahn, J. Jernigan
- Physics
- 30 October 2002
We present high-resolution X-ray spectra of 14 putative cooling-flow clusters of galaxies obtained with the Reflection Grating Spectrometer on XMM-Newton. The clusters in the sample span a large…
XMM-Newton Reflection Grating Spectrometer Observations of Discrete Soft X-Ray Emission Features from NGC 1068
- A. Kinkhabwala, M. Sako, D. Liedahl
- Physics
- 19 March 2002
We present the first high-resolution, soft X-ray spectrum of the prototypical Seyfert 2 galaxy, NGC 1068. This spectrum was obtained with the XMM-Newton Reflection Grating Spectrometer (RGS).…
Discovery of a Binary Active Galactic Nucleus in the Ultraluminous Infrared Galaxy NGC 6240 Using Chandra
- S. Komossa, V. Burwitz, G. Hasinger, P. Predehl, J. Kaastra, Y. Ikebe
- Physics
- 4 December 2002
Ultraluminous infrared galaxies (ULIRGs) are outstanding due to their huge luminosity output in the infrared, which is predominantly powered by superstarbursts and/or hidden active galactic nuclei…
X-ray imaging spectroscopy of Abell 1835
- J. Peterson, F. Paerels, I. Sakelliou
- Physics
- 31 October 2000
We present detailed spatially-resolved spectroscopy results of the observation of Abell 1835 using the European Photon Imaging Cameras (EPIC) and the Reflection Grating Spectrometers (RGS) on the…
Temperature and Entropy Profiles of Nearby Cooling Flow Clusters Observed with XMM-Newton and the Effervescent Heating Model
- R. Piffaretti, P. Jetzer, Japan.
- Physics
- 9 December 2004
We investigate temperature and entropy profiles of 13 nearby cooling flow clusters observed with the EPIC cameras of XMM-Newton. When normalized and scaled by the virial radius the temperature…
The Hot and Energetic Universe: A White Paper presenting the science theme motivating the Athena+ mission
- K. Nandra, D. Barret, I. Zhuravleva
- Physics
- 1 June 2013
This White Paper, submitted to the recent ESA call for science themes to define its future large missions, advocates the need for a transformational leap in our understanding of two key questions in…
A new radiative cooling curve based on an up-to-date plasma emission code
- K. Schure, D. Kosenko, J. Kaastra, R. Keppens, J. Vink
- Physics
- 28 September 2009
This work presents a new plasma cooling curve that is calculated using the SPEX package. We compare our cooling rates to those in previous works, and implement the new cooling function in the…
Line ratios for helium-like ions: Applications to collision-dominated plasmas ?
- D. Porquet, R. Mewe, J. Dubau, A. Raassen, J. Kaastra
- Physics
- 18 July 2001
The line ratios R and G of the three main lines of He-like ions (triplet: resonance, intercombination, forbidden lines) are calculated for C v ,N vi ,O vii ,N eix ,M gxi, and Si xiii. These ratios…
Constraining supernova models using the hot gas in clusters of galaxies
- J. Plaa, N. Werner, J. Bleeker, J. Vink, J. Kaastra, M. Méndez
- Physics
- 19 January 2007
Context: The hot X-ray emitting gas in clusters of galaxies is a very large repository of metals produced by supernovae. During the evolution of clusters, billions of supernovae eject their material…
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