A dataset provided by the European Space Agency

Proposal ID 055387
Title Most of the Baryons in Galaxies
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0553870101

DOI https://doi.org/10.5270/esa-312e3zk
Principal Investigator, PI Prof JOEL BREGMAN
Abstract Galaxies are missing most of their baryons when compared to the cosmologicalbaryon to dark matter ratio. The Milky Way is missing 2/3 of its baryons andless massive galaxies have retained less than 10% of their baryons. Theorysuggests that these baryons were expelled by intense galactic winds during theprimary star formation period. These galactic winds carry gas far beyond thevirial radius of small and modest galaxies, but the most massive galaxies shouldretain much of this material. e propose to test this picture by searching forthe missing baryons surrounding the most massive spiral galaxy, UGC 12591, afairly isolated galaxy with a rotational velocity of almost 500 km/sec. Ifsuccessful, we will detect a significant fraction of the 5E11 Msun of its missing baryons.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2008-12-15T19:26:50Z/2008-12-16T17:36:19Z
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 2010-01-17T00:00:00Z
Keywords "massive galaxy", "dark matter ratio", "cosmological baryon", "fairly isolated galaxy", "ugc 12591", "intense galactic winds", "virial radius", "modest galaxy", "massive spiral galaxy", "rotational velocity", "5e11 msun"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Prof JOEL BREGMAN, 2010, 'Most of the Baryons in Galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-312e3zk