| Proposal ID | 014988 |
| Title | Radio Halos and Relics and Merger Shocks in Clusters of Galaxies |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0149880101 |
| DOI | https://doi.org/10.5270/esa-k796ux9 |
| Principal Investigator, PI | Dr Craig Sarazin |
| Abstract | Radio halos and relics are important diagnostics for identifying clustersundergoing a major merger. We propose observations of 4 clusters in which wehave recently found a halo or relic. They all show other evidence of a merger.Our aims are to image shocks in the intracluster medium due to the merger, andto detect inverse Compton from the radio-emitting electrons, both in images andin spectra. Radio, IC X-ray, and shock measurements will determine the clustermagnetic field and the efficiency of electron acceleration. Shock physics willdetermine the efficiency of thermalization in shocks and whether electronsundergo collisionless heating. Persistence of merger features tells us about thedynamics of mergers and about peaks in the dark matter distribution in clusters. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-08-01T04:25:52Z/2003-08-01T11:46:05Z |
| 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 | 2004-10-31T00:00:00Z |
| Last Update | 2025-01-27 |
| Keywords | "shock measurements", "radio halos", "shock physics", "image shoc", "collisionless heating", "radio emitting electrons", "ic xray", "merger shoc", "electron acceleration", "dark matter distribution", "inverse compton", "major merger", "intracluster medium", "cluster magnetic field" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr Craig Sarazin, 2004, 'Radio Halos and Relics and Merger Shocks in Clusters of Galaxies', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-k796ux9 |