| Proposal ID | 082491 |
| Title | Unveiling the Nature of Fossil Groups of Galaxies with XMM-Newton-HST |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0824910101 |
| DOI | https://doi.org/10.5270/esa-7ltqayw |
| Principal Investigator, PI | Dr renato dupke |
| Abstract | Fossil groups present a puzzle to theories of structure formation. Despite thelow number of bright galaxies, their high velocity dispersions and high T_X seemto indicate cluster-like gravitational potential wells. The measuredconcentration parameters seem to be high indicating early formation epochs butsome recent observations contradict that scenario. We propose a discriminatorytest, using intracluster light to mass ratio, combining short XMM and HSTobservations for a classic massive fossil group. We will use a newly developedmethod for measuring ICL that is independent of arbitrary assumptions aboutlight distribution and that has provided new robust results. This test willallow us to set independent constraints on formation mechanisms and ages of these peculiar (but numerous) systems. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2018-05-07T21:41:28Z/2018-10-27T00:57:42Z |
| 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 | 2019-11-13T23:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "xmm newton hst", "bright galaxy", "mass ratio", "developed method", "short xmm", "discriminatory test", "classic massive fossil", "structure formation", "XMM-Newton", "formation epochs", "HST", "concentration parameters", "numerous systems", "formation mechanisms", "gravitational potential", "velocity dispersions", "XMM", "intracluster light", "light distribution" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr renato dupke, 2019, 'Unveiling the Nature of Fossil Groups of Galaxies with XMM-Newton-HST', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-7ltqayw |