Proposal ID | 055387 |
Title | Most of the Baryons in Galaxies |
Download Data Associated to the proposal | 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 |
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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 |
Last Update | 2025-01-27 |
Keywords | "virial radius", "ugc 12591", "massive spiral galaxy", "fairly isolated galaxy", "massive galaxy", "intense galactic winds", "modest galaxy", "dark matter ratio", "rotational velocity", "cosmological baryon", "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 |