| Proposal ID | 040113 |
| Title | X-ray Luminous Groups in the Process of Formation |
| Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0401130101 |
| DOI | https://doi.org/10.5270/esa-t3aukf5 |
| Principal Investigator, PI | Dr John Mulchaey |
| Abstract | We propose XMM-Newton observations of two X-ray luminous groups at intermediateredshifts that do not follow the morphological trends found for nearby X-raygroups. In particular, the X-ray emission in these systems is not centered on adominant elliptical galaxy. Such systems are very rare in the nearby universe,suggesting significant evolution in the X-ray group population over the last 5billion years. Groups without a central galaxy may be systems in the process ofcollapsing for the first time. Our deep XMM-Newton observations will allow us totest this idea by searching directly for substructure in the hot gas and lookingfor the departures expected from optical/X-ray scaling relations. |
| Publications |
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| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2006-12-04T20:22:22Z/2006-12-05T09:18:29Z |
| Version | 21.51_20241115_1113 |
| 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 | 2008-02-03T00:00:00Z |
| Last Update | 2026-07-09 |
| Keywords | "morphological trends", "intermediate redshifts", "central galaxy", "XMM-Newton", "hot gas", "XMM", "xray luminous", "dominant elliptical galaxy", "x ray luminous", "xray emission", "nearby xray", "deep xmm newton", "nearby universe", "xmm newton" |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, Dr John Mulchaey, 2008, 'X-ray Luminous Groups in the Process of Formation', 21.51_20241115_1113, European Space Agency, https://doi.org/10.5270/esa-t3aukf5 |
| Rights | Data hosted in the ESA Space Science Archives are distributed under the CC BY-NC 3.0 IGO license. |