Proposal ID | 020567 |
Title | COSMOLOGY WITH A SECOND SUNYAEV-ZELDOVICH EFFECT CLUSTER AT Z |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0205670101 |
DOI | https://doi.org/10.5270/esa-ndofawr |
Principal Investigator, PI | Dr DIANA WORRALL |
Abstract | Sensitive XMM-Newton observations of the luminous Sunyaev-Zeldovich effectcluster CL 0016+16 (z=0.55) have led to considerably improved measurements ofdistance, gas-mass fraction, and Hubble constant, for a cluster at a redshiftwhere curvature of the angular-diameter/redshift relation is particularlyevident. We propose a deep observation of the clusters twin, MS 0451.6-0305, toallow similar measurements for this second cluster. Averaging results for thetwo clusters will alleviate the potential problem of systematic errors in thedistance estimate arising from projection effects. The results will also testthe suggestion that the baryonic mass fraction in MS 0451.6-0305 is anomalouslylow, at only about a third the value seen in CL 0016+16. |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2004-09-16T23:52:02Z/2004-09-17T12:13:48Z |
Version | 17.56_20190403_1200 |
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 | 2005-10-08T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "luminous sunyaev zel", "baryonic mass fraction", "systematic errors", "redshift relation", "ms 0451", "XMM-Newton", "cl 0016", "dovich effect cluster", "angular diameter", "XMM", "gas mass fraction", "anomalously low", "hubble constant", "projection effects", "considerably improved measurements", "sunyaev zel", "sensitive xmm newton" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr DIANA WORRALL, 2005, 'COSMOLOGY WITH A SECOND SUNYAEV-ZEL'DOVICH EFFECT CLUSTER AT Z', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-ndofawr |