Three observatories to depict the violent collision of two clusters of galaxies
Three major observatories (Subaru, GBT and XMM-Newton) have joined their forces to observe the collision of a pair of galaxy clusters, HSC J023336-053022 (XLSSC 105), located four billion light years away. The spectacular image resulting from the data taken by the Subaru telescope in the visible, the Green Bank Telescope in radio and finally the X-ray satellite XMM-Newton (a space facility intensively used by the Astrophysical Department / AIM Laboratory of CEA Paris-Saclay in particular with its XMM-XXL program), shows that the violence of the shock heats the gas located between the clusters to more than 400 million degrees. It also allows indirect mapping of the dark matter present in the system. This was work was published in the September 2020 issue of the MNRAS journal.
See : the ESA press release
Contact CEA: Marguerite Pierre
“Active gas features in three HSC-SSP CAMIRA clusters revealed by high angular resolution analysis of MUSTANG-2 SZE and XXL X-ray observations” Okabe et al, Monthly Notices of the Royal Astronomical Society, Sept. 2020, https://arxiv.org/abs/1911.09236
See :
The ESA press release (ESA) (12 novembre 2020)
The SUBARU press release (12 novembre 2020)
The GBT press release (12 novembre 2020)
See also :
The XMM-XXL site at CEA
1Pascal, Pensées B.1 (Différence entre l’esprit de géométrie et l’esprit de finesse)