We have retrived and analyzed the archival RGS-XMM spectrum of the QSOQ0056-363, which is located in the background of the Sculptor supercluster. Inthe spectrum we marginally detect (4sigma) OVII absorption features at theredshift of the intervening supercluster (z=0.10), which is probably tracingWarm-Hot Intergalactic Medium (WHIM) in this large scale structure. Ifconfirmed, the implied column density of OVII is 3e17 cm-2, i.e. one order ofmagnitude larger than the WHIM previously detected along other random lines ofsights. We propose a 100ksec RGS observation to confirm the OVII detection, andto detect or set tight upper limits to the features of OVIII and NeIX, whichwould allow to constrain the properties of this thick WHIM at z=0.10.
Instrument
EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage
2003-12-21T19:43:54Z/2003-12-23T00:19:15Z
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 ROBERTO MAIOLINO, 2005, 'CONFIRMATION OF A THICK WHIM AT Z', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-44f98sh
