A dataset provided by the European Space Agency

Proposal ID 009002
Title XMM Searches for Iron Lines in Low Luminosity AGN: a Test of Accretion Theories
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https://nxsa.esac.esa.int/nxsa-sl/servlet/data-action-aio?obsno=0090020101

DOI https://doi.org/10.5270/esa-xzscc6v
Principal Investigator, PI Dr Andrew Ptak
Abstract We propose to use XMM to observe the nuclei of several nearby galaxies whichharbor low luminosity active galactic nuclei. We intend to search for ironlines in the X-ray spectra of these systems, all of which were observed withASCA and have either a non-detection or a marginal detection of an ironemission line. The detection of iron lines in these galaxies (particularlybroad lines) would rule out the ADAF hypothesis and would support a model inwhich accretion proceeds via a geometrically thin, optically thick, accretiondisk. On the other hand, non-detection of iron lines, with the firm upperlimits on equivalent widths which XMM can obtain, would strongly support theADAF hypothesis.
Publications
Instrument EMOS1, EMOS2, EPN, OM, RGS1, RGS2
Temporal Coverage 2001-05-09T04:20:55Z/2001-05-09T08:01:17Z
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 2002-07-25T00:00:00Z
Keywords "firm upper limits", "optically thick", "adaf hypothesis", "broad lines", "equivalent widths", "iron emission line", "accretion proceeds via", "XMM", "nearby galaxy", "accretion disk", "xray spectra", "geometrically thin", "xmm searches", "marginal detection", "low luminosity agn", "accretion theories", "iron lines"
Publisher And Registrant European Space Agency
Credit Guidelines European Space Agency, Dr Andrew Ptak, 2002, 'XMM Searches for Iron Lines in Low Luminosity AGN: a Test of Accretion Theories', 17.56_20190403_1200, European Space Agency, https://doi.org/10.5270/esa-xzscc6v