We propose to observe two fossil clusters discovered in the Planck SZ survey.They are the first-ever fossil systems initially discovered via the SZ effect,and, with estimated masses M500 > 3.75 x 10e14 Msun, they are among the highest-mass fossil systems yet discovered. With these X-ray observations we willinvestigate their density, temperature, entropy and pressure profiles andcompare with reference X-ray and SZ-selected fossil and non-fossil data. We willderive mass profiles and test for adiabatic contraction. As these objects areresolved in Planck, we will combine X-ray and SZ observations to investigate thepressure distributions in the outskirts.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2016-02-05T10:26:41Z/2016-02-05T22:36:41Z
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 Gabriel Pratt, 2017, 'High-mass fossil clusters discovered through the SZ effect', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-e0i56vv
