Proposal ID | 014941 |
Title | X-ray Spectra of High Redshift (z>4) Quasars |
Download Data Associated to the proposal | https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0149410401 |
DOI | https://doi.org/10.5270/esa-si51j7n |
Principal Investigator, PI | Dr Smita Mathur |
Abstract | We propose to harness both the unequalled sensitivity and broad energy band ofXMM to systematically study a sample of high redshift (z>4) quasars, the mostluminous, youngest and least studies objects known. XMM can determine accuratelyboth the absorption column density and the underlying spectral shape of theX-ray emission allowing us to resolve intriguing, outstanding questions such as:Is the apparent difference between the X-ray spectra of high-redshift radio-loudand radio-quiet quasars real? If so, is it explained by intrinsic absorption orby different evolution of the X-ray spectrum with redshift? What constraints canwe place on the X-ray spectral evolution with redshift and/or luminosity foreach class? What limits can we put on intervening Damped Ly-alpha systems? |
Publications |
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Instrument | EMOS1, EMOS2, EPN, OM, RGS1, RGS2 |
Temporal Coverage | 2003-05-17T06:09:29Z/2003-05-17T15:44:04Z |
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 | 2004-05-31T00:00:00Z |
Last Update | 2025-01-27 |
Keywords | "redshift z", "unequalled sensitivity", "x ray spectra", "absorption column density", "xray spectral evolution", "resolve intriguing", "spectral shape", "xray emission", "broad energy band", "XMM", "xray spectrum", "redshift radio loud", "xray spectra" |
Publisher And Registrant | European Space Agency |
Credit Guidelines | European Space Agency, Dr Smita Mathur, 2004, 'X-ray Spectra of High Redshift (z>4) Quasars', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-si51j7n |