A dataset provided by the European Space Agency

Name 004694
Title The total baryon fraction in groups: mapping hot gas out to the virial radius
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0046940101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0046940201
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0046940401

DOI 10.5270/esa-ew5iczp
Author Dr Trevor Ponman
Description Galaxy groups contain the majority of galaxies, and probably most of the baryons, in the Universe. Unfortunately the low X-ray surface brightness of groups has prevented the detection of the gas at large radii which should dominate their baryon content. The superb sensitivity of XMM offers the first opportunity to remedy this. We propose, for the first time, to trace the surface brightness of several groups out to their virial radii. This will allow us to measure total gas and iron masses, baryon fractions, and mass-light, gas-star and iron-mass-light ratios, and to investigate the
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-05-07T11:45:02Z/2001-11-02T22:01:52Z
Version 17.56_20190403_1200
Mission Description The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 2003-01-04T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2003-01-04T00:00:00Z, 004694, 17.56_20190403_1200. https://doi.org/10.5270/esa-ew5iczp