| Name | 067291 |
| Title | Are massive clusters always X-ray luminous? |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0672910101 |
| DOI | https://doi.org/10.5270/esa-f7e9t0h |
| Author | European Space Agency |
| Description | Studies of galaxy clusters are important for both cosmology and the formation of baryonic structures. An important relation in cluster science is the f_gas - M relation. However, the cluster samples used to constrain this relation are X-ray selected and the current XMM and Chandra archives are also heavily biased to X-ray selected clusters. To address this important bias, we construct a sample of 11 most massive clusters from the SDSS-C4 cluster catalog. Six of them have been observed by XMM or Chandra but they are all X-ray luminous, while the five unobserved clusters are X-ray faint. We propose to observe these five clusters to search for X-ray faint, massive cluster, with potentially important implications on the cluster mass - proxy relations. |
| Publication | No observations found associated with the current proposal |
| Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
| Temporal Coverage | 2011-07-31T01:27:26Z/2011-07-31T06:26:02Z |
| 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 | 2012-08-19T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2012, Are Massive Clusters Always X-Ray Luminousquestionmark, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-f7e9t0h |