A dataset provided by the European Space Agency

Proposal ID 004934
Title Post-Merger Galaxies and the Generation of Hot Halos in Ellipticals
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0049340201
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0049340301
https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0049340701
DOI https://doi.org/10.5270/esa-khii2lt
Principal Investigator, PI Dr Trevor Ponman
Abstract Previous studies of merging spiral galaxies reveal that the hot ISM is expelledfrom the system at the point of nuclear merger. After 1 Gyr the merger remnantappears to have little or no hot gas halo. Yet normal, old ellipticals clearlyhave extensive hot halos. This proposal aims to solve this mystery. In parti-cular, do merger remnants become more X-ray luminous over time or do mergerscreate a low Lx elliptical. There is very little X-ray data for post merger rem-nants with ages of 1-3 Gyrs. This timescale appears to be the crucial turningpoint. in their X-ray properties. We propose to image such a sample with the PN.This will provide a key consistency check of the merger hypothesis and will con-strain the different possible mechanisms for hot halo regeneration.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-11-13T19:43:35Z/2002-04-27T16:40:31Z
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 2003-05-24T00:00:00Z
Keywords "xray properties", "xray luminous", "merging spiral galaxy", "timescale appears", "hot ism", "mergers create", "hot gas halo", "post merger galaxy", "merger hypothesis", "nuclear merger", "low lx elliptical", "merger remnant appears", "hot halo regeneration", "extensive hot halos", "key consistency check", "little xray data", "con strain", "parti cular", "merger remnant", "hot halos"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Trevor Ponman, 2003, 'Post-Merger Galaxies and the Generation of Hot Halos in Ellipticals', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-khii2lt