| Name | 020567 |
| Title | COSMOLOGY WITH A SECOND SUNYAEV-ZEL.DOVICH EFFECT CLUSTER AT Z |
| URL | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0205670101 |
| DOI | https://doi.org/10.5270/esa-ndofawr |
| Author | Dr DIANA WORRALL |
| Description | Sensitive XMM-Newton observations of the luminous Sunyaev-Zel.dovich effect cluster CL 0016+16 (z=0.55) have led to considerably improved measurements of distance, gas-mass fraction, and Hubble constant, for a cluster at a redshift where curvature of the angular-diameter-redshift relation is particularly evident. We propose a deep observation of the cluster.s twin, MS 0451.6-0305, to allow similar measurements for this second cluster. Averaging results for the two clusters will alleviate the potential problem of systematic errors in the distance estimate arising from projection effects. The results will also test the suggestion that the baryonic mass fraction in MS 0451.6-0305 is anomalously low, at only about a third the value seen in CL 0016+16. |
| Publication | No observations found associated with the current proposal |
| 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 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 | 2005-10-08T00:00:00Z |
| Publisher And Registrant | European Space Agency |
| Credit Guidelines | European Space Agency, 2005-10-08T00:00:00Z, 020567, 17.56_20190403_1200. https://doi.org/10.5270/esa-ndofawr |