A dataset provided by the European Space Agency

Name 014825
Title The X-ray structure of a luminous fossil galaxy group
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148250101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0148250201

DOI 10.5270/esa-dt4h6dq
Author Dr Laurence Jones
Description We propose a detailed study of a luminous 'fossil. group, which contains a normal, relaxed giant elliptical galaxy but almost no L* galaxies. It appears to be very old, and may represent an end-point of galaxy merging. An EPIC study will enable us to understand the unusual properties: a very high X-ray luminosity for the temperature, and a remarkably elongated X-ray surface brightness, indicative of a very anisotropic dark matter distribution. These properties have important implications for the impact of preheating at early epochs and the formation of structures within dark matter filaments. An accompanying proposal is for a sample of nearby, low Lx fossil groups (PI Ponman).
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2003-07-08T14:01:15Z/2003-12-29T00:39:37Z
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 2005-01-20T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005-01-20T00:00:00Z, 014825, 17.56_20190403_1200. https://doi.org/10.5270/esa-dt4h6dq