A dataset provided by the European Space Agency

Name 084295
Title Unveiling the Nature of Fossil Groups with XMM-HST II: Reducing Variance


DOI https://doi.org/10.57780/esa-8yspcnm
Author Dr renato dupke
Description Fossil groups (FGs) present a puzzle to theories of structure formation. Despite the low number of bright galaxies, their high velocity dispersions and high T_X seem to indicate cluster-like potential wells. Their measured c200 are high indicating early formation epochs, in contradiction with the observed lack of expected large cool cores. We have proposed a discriminatory test, using the intracluster light to mass ratio (ICLf-M) in FGs, using XMM and HST. The pilot study was successful and suggests that FGs are not merging and show high ICLf-M ratios in comparison to relaxed systems. We propose to increase the sample of bonafide FGs complementing XMM and HST archived observations to account for sample variance, allowing us to reliably constrain their formation mechanisms and ages.
Publication No observations found associated with the current proposal
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2020-04-18T21:37:03Z/2020-06-07T09:28:24Z
Version 18.02_20200221_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 2021-07-22T00:00:00Z
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, 2021-07-22T00:00:00Z, 084295, 18.02_20200221_1200. https://doi.org/10.57780/esa-8yspcnm