Name | 084418 |
Title | Detection of Extended Gas Perpendicular to Cluster Merger Axes |
URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0844180101 |
DOI | https://doi.org/10.5270/esa-gutlbsj |
Author | Prof Nobuhiro Okabe |
Description | We define, based on optical galaxy distributions, an unbiased sample of merging clusters to compile various merger phases. The ROSAT image stacked over cluster- subcluster pairs shows that the X-ray emitting gas in the central region is elongated along the merger axis, however, outside the core it is extended along its perpendicular direction. It implies that the gas halo is pushed outwards perpendicular to the merger axis by colliding two gas cores. XMM-Newton snapshots of the clusters enable us to identify cluster merger phases and provide a robust evidence of the gas extended perpendicular to the merger axis, for the first time. Furthermore,we measure X-ray temperature and luminosity within r500, in order to quantify merger boost by comparing with weak-lensing masses. |
Publication | No observations found associated with the current proposal |
Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2019-08-06T23:49:43Z/2019-08-10T11:02:43Z |
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 | 2020-09-02T22:00:00Z |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Prof Nobuhiro Okabe, 2020, 084418, 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-gutlbsj |