A dataset provided by the European Space Agency

Name 020167
Title YOUNG ELLIPTICALS - DO THEY POSSESS HOT GAS HALOS?
URL

http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201670101
http://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201670201

DOI 10.5270/esa-1dejm28
Author Dr ANNE E. SANSOM
Description XMM observations of young elliptical galaxies will determine if they have hot gas in their ISM. Many old, relaxed ellipticals posess such hot gaseous haloes, however the mechanism by which these are created is not understood. Suggestions are that the hot haloes formed from stellar mass loss or by thermalization of cold gas in-falling from tidal tails after a merger. Correlations of X-rays with age indicate a surprisingly slow build-up of hot gas, over several Gyr. So where does the hot gas come from? We will obtain sensitive XMM-Newton observations of young ellipticals (1 - 3 Gyr) and compare these with data for older ellipticals, to see how the X-ray emission evolves. If there is no hot gas in the young ellipticals, then we will get a clean view of the discrete stellar components.
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Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2004-07-07T11:04:58Z/2004-07-27T19:37:06Z
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 2005-08-28T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2005-08-28T00:00:00Z, 020167, 17.56_20190403_1200. https://doi.org/10.5270/esa-1dejm28