A dataset provided by the European Space Agency

Proposal ID 020167
Title YOUNG ELLIPTICALS - DO THEY POSSESS HOT GAS HALOS?
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201670101
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0201670201

DOI https://doi.org/10.5270/esa-1dejm28
Principal Investigator, PI Dr ANNE E. SANSOM
Abstract XMM observations of young elliptical galaxies will determine if they have hotgas in their ISM. Many old, relaxed ellipticals posess such hot gaseous haloes,however the mechanism by which these are created is not understood. Suggestionsare that the hot haloes formed from stellar mass loss or by thermalization ofcold gas in-falling from tidal tails after a merger. Correlations of X-rays withage indicate a surprisingly slow build-up of hot gas, over several Gyr. So wheredoes the hot gas come from? We will obtain sensitive XMM-Newton observations ofyoung 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 youngellipticals, then we will get a clean view of the discrete stellar components.
Publications
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 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 2005-08-28T00:00:00Z
Keywords "hot gas", "XMM", "hot haloes formed", "hot gaseous haloes", "surprisingly slow build", "xray emission evolves", "tidal tails", "elliptical galaxy", "XMM-Newton", "discrete stellar components", "stellar mass loss", "sensitive xmm newton", "cold gas", "relaxed ellipticals posess"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr ANNE E. SANSOM, 2005, 'YOUNG ELLIPTICALS - DO THEY POSSESS HOT GAS HALOSquestionMark', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-1dejm28