Clumped gas in cluster outskirts has recently been invoked to explain thethermodynamic state of the ICM observed with Suzaku around the virial radius.Numerical simulations suggest that these clumps will preferentially exist alongfilaments and that they should be detectable with XMM-Newton due to theircompact size. In A1689, Suzaku observations indicate excess emission in thedirection of a filament, and ROSAT data suggest the existence of point-likesources just beyond the FOV of the existing XMM-Newton pointing. We propose todetect any compact sources comprising this excess but unrecognized as such dueto Suzaku.s large PSF. A second pointing in the direction of a void will helpconfirm the clumping signature and asses the effect of environment on clumping.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2013-01-07T12:17:22Z/2013-01-08T21:10:26Z
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 Daniel Wik, 2014, 'Clumping comma Contamination comma or Equilibrium in the Outskirts of Abell 1689', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-e4hwz8w
