We detected the signature of turbulence in the ICM of the Coma cluster. Ofspecial importance is the determination of the dissipation scale where turbulentkinetic energy is expected to be transformed into heat. Presently only upperobservational limits could be determined with our previous 50 ks data of thecentral region. Thus we propose an additional 150 ks XMM-Newton observation ofthe center of the Coma galaxy cluster. This will push the spatially resolved gaspressure maps to the 20 arcsec angular resolution limit. The significantlydeeper exposure will improve on the slope of the turbulence power spectrum, onthe determination of the Reynold.s number, and on the kinematic viscosity of theintra-cluster medium.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2005-06-06T23:35:22Z/2005-06-19T06:36:33Z
Version
17.56_20190403_1200
Mission Description
The European Space Agencys (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESAs second cornerstone of the Horizon 2000 Science Programme. It carries 3 high throughput X-ray telescopes with an unprecedented effective area, and an optical monitor, the first flown on a X-ray observatory. The large collecting area and ability to make long uninterrupted exposures provide highly sensitive observations. Since Earths atmosphere blocks out all X-rays, only a telescope in space can detect and study celestial X-ray sources. The XMM-Newton mission is helping scientists to solve a number of cosmic mysteries, ranging from the enigmatic black holes to the origins of the Universe itself. Observing time on XMM-Newton is being made available to the scientific community, applying for observational periods on a competitive basis.
European Space Agency, Dr Peter Schuecker, 2006, 'Turbulence Dissipation in the Coma Cluster', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ehqgpi7
