A dataset provided by the European Space Agency

Proposal ID 067377
Title CLoGS: The Complete Local-volume Groups Sample
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DOI https://doi.org/10.5270/esa-j2ldi71
Principal Investigator, PI Dr Ewan O.Sullivan
Abstract The current lack of a statistical X-ray sample of galaxy groups is a serioushindrance to studies of galaxy evolution, structure formation, and feedbackprocesses. The subset of nearby groups observed in the X-ray contains less thanhalf the number of systems expected and is biased in unknown ways. We havedefined an optically selected, statistically complete sample of groups in thelocal Universe, screened to exclude systems which are uncollapsed or embedded inlarger structures. This will allow the first detailed studies of the gascontent, thermal history and physical properties of an unbiased sample ofgroups, and significantly improve our understanding of the mass distribution inthe local volume.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2011-05-18T06:29:37Z/2012-07-02T19:41:33Z
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.
Creator Contact https://www.cosmos.esa.int/web/xmm-newton/xmm-newton-helpdesk
Date Published 2013-07-24T00:00:00Z
Keywords "statistical xray sample", "unbiased sample", "mass distribution", "statistically complete sample", "local universe", "galaxy evolution", "complete lovolume", "local volume", "physical properties", "gas content", "structure formation", "thermal history", "feedback processes", "larger structures", "exclude systems"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Ewan O.Sullivan, 2013, 'CLoGS: The Complete Local-volume Groups Sample', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-j2ldi71