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Piffaretti

Fakultäten » Mathematisch-naturwissenschaftliche Fakultät » Physik-Institut » Prof. Dr. Philippe Jetzer » Piffaretti

Completed research project

Title / Titel Thermal structure of cooling clusters
PDF Abstract (PDF, 14 KB)
Summary / Zusammenfassung We present spatially resolved X-ray spectra taken with the EPIC cameras of XMMNewton of a sample of 17 cooling clusters and three non-cooling clusters for comparison. The deprojected spectra are analyzed with a single-temperature model. All cooling clusters show a central decrement of the average temperature, most of them of a factor of ∼2. Three clusters show a weak temperature decrement, while two others have a very strong temperature decrement. We investigate the role of heat conduction by electrons and find that the theoretically predicted conductivity rates are not high enough to balance radiation losses.
Publications / Publikationen 2004 International Astronomical Union
Project leadership and contacts /
Projektleitung und Kontakte
Dr. R. Piffaretti (Project Leader)  
Prof Dr. Philippe Jetzer  
Funding source(s) /
Unterstützt durch
Universität Zürich (position pursuing an academic career), Others
 
Duration of Project / Projektdauer Jul 2004 to Jul 2005