| Name | 015140 |
| Title | Temperature Structure of Apparently Relaxed Galaxy Groups |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0151400201 |
| DOI | https://doi.org/10.5270/esa-a4ie871 |
| Author | European Space Agency |
| Description | Most galaxy groups contain recent or impending mergers, and therefore are not in dynamical equilibrium. However, galaxy groups with declining velocity dispersion profiles (VDPs) could be relaxed: theoretical descriptions of equilibrium systems frequently require VDPs that decrease with distance from the center. We have assembled a sample of such galaxy groups; each has a complete set of optical spectra as well as extended X-ray emission detected by ROSAT. We would like to determine whether the gas temperature in these systems declines similarly to the VDP. Our measurements would provide unprecedented constraints on the relationship between gas temperature and velocity dispersion within individual poor groups of galaxies. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2003-05-26T15:33:50Z/2003-05-26T19:42:23Z |
| Version | 17.56_20190403_1200 |
| Mission Description | The European Space Agency's (ESA) X-ray Multi-Mirror Mission (XMM-Newton) was launched by an Ariane 504 on December 10th 1999. XMM-Newton is ESA's 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 Earth's 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 | 2004-06-21T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2004, Temperature Structure Of Apparently Relaxed Galaxy Groups, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-a4ie871 |