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Title: The 6.7-keV iron-line emission in the Galactic Centre
Authors: Warwick, Robert S.
Sakano, Masaaki
Decourchelle, A.
First Published: 1-Jan-2006
Presented at: Galactic Center Workshop From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei, Bad Honnef, GERMANY
Start Date: 18-Apr-2006
End Date: 22-Apr-2006
Publisher: IOP Publishing
Citation: Galactic Center Workshop 2006: From the Center of the Milky Way to Nearby Low-Luminosity Galactic Nuclei, 2006, 54, pp. 103-109 (7)
Abstract: We use recent XMM-Newton observations to study the ''diffuse'' X-ray emission seen in the Galactic Centre Region. Spectrally, the emission can be separated into three major components, each characterised by a prominent spectral line. Using these lines as tracers, we investigate the underlying spatial distribution of the various components. Specifbally, we find the 6.7-keV line of helium-like iron, has a relatively smooth, circularly symmetric distribution centred on Sgr A* and a surface brightness which falls off with radius as r−0.87±0.06 over the range r = 3' − 12'. This mirrors the distribution of the underlying stellar population and adds strong support to the hypothesis that the 6.7-keV line and the associated hard thermal continuum (with kT ≈ 8 keV) originates in the summed emission of faint point sources.
DOI Link: 10.1088/174-6596/54/1/018
ISSN: 1742-6588
eISSN: 1742-6596
Version: Publisher Version
Status: Peer-reviewed
Type: Conference Paper
Rights: Archived with reference to SHERPA/RoMEO and publisher website. Creative Commons Attribution License 3.0
Appears in Collections:Conference Papers & Presentations, Dept. of Physics and Astronomy

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