A dataset provided by the European Space Agency

Proposal ID 008559
Title An X-ray spectroscopic determination of the Hubble constant
Download Data Associated to the proposal

https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0085590201

DOI https://doi.org/10.5270/esa-3hychlr
Principal Investigator, PI Dr Frits Paerels
Abstract We propose to observe the Perseus cluster, in order to accurately constrain the spatial distribution of the Fe XXV n=3-1 to n=2-1 fluxes. The n=2-1 resonance line is known to be optically thick to scattering, the n=3-1 lines are not. The ratio map therefore provides a direct measure of the resonance scattering depth, which, when combined with the volume emission measure and the angular size of the cluster, produces an estimate of the absolute distance in a manner entirely analogous to the Sunyaev-Zeldovich effect. Together with the redshift, this gives the Hubble constant directly, just from spatially resolved X-ray spectroscopy.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-02-10T07:15:05Z/2001-02-10T19:16:02Z
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 2002-09-22T00:00:00Z
Keywords "angular size", "volume emission", "resolved xray spectroscopy", "ratio map", "fe xxv", "resonance line", "perseus cluster", "spatial distribution", "sunyaev zeldovich effect", "resonance scattering depth", "hubble constant", "xray spectroscopic", "optically thick", "absolute distance"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Frits Paerels, 2002, 'An X-ray spectroscopic determination of the Hubble constant', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-3hychlr