The dark matter self-interaction cross-section depends on velocity and theirmodel claims to explain observations from dwarfs to massive clusters. We need totest these models at galaxy group scales, where no usable data exist. Analysisfrom even a single system will be valuable. We propose a 40 ksec observation ofa massive galaxy group HSC J1441-0053 to put the first constraints in this massrange. This is no ordinary (lensing) galaxy-group -it has lensed images ofdifferent sources at varying angular radii which allows us to get more accurateconstraints on the inner density profile than any other (non-) lensing galaxygroups at similar masses and redshift. The accurate centroid determination andindependent mass estimation with XMM are vital to derive accurate mass model.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2021-02-08T03:35:30Z/2021-02-08T15:58:50Z
Version
18.02_20200221_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, Mr Keigo Tanaka, 2022, 'X-ray observation of a massive strong-lensing galaxy group HSC J1441-0053', 18.02_20200221_1200, European Space Agency, https://doi.org/10.57780/esa-bms6zhf
