| Proposal ID | 020519 |
| Title | DETERMINING THE TEMPERATURE PROFILES OF CLUSTERS OF GALAXIES ONCE AND FOR ALL |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0205190101 |
| DOI | https://doi.org/10.5270/esa-9wouifk |
| Principal Investigator, PI | Dr JIMMY IRWIN |
| Abstract | The temperature profile of the hot gas within clusters of galaxies is a crucialquantity for determining the gravitational mass and baryon fraction of acluster, as well as a potential discriminant between competing cosmologicalmodels. Current observations will determine the temperature profiles out to 40%of the virial radius, yet simulations indicate the temperature should dropsteeply at larger radii. We propose to test this important prediction for thefirst time by observing four nearby, bright clusters with four off-centerpointings so we can determine the temperature profile out to 100% of the virialradius. This will represent the largest sample to date for which temperatureprofiles will be determined to a large fraction of the virial radius. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2004-01-25T08:28:46Z/2004-01-26T01:40:42Z |
| 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 | 2005-02-21T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "virial radius", "center pointings", "temperature profiles", "temperature profile", "bright cluster", "cosmological models", "largest sample", "gravitational mass", "potential discriminant", "drop steeply", "hot gas", "larger radii", "baryon fraction" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr JIMMY IRWIN, 2005, 'DETERMINING THE TEMPERATURE PROFILES OF CLUSTERS OF GALAXIES ONCE AND FOR ALL', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-9wouifk |