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An X-ray survey of the central molecular zone: variability of the FeKα emission line

Published online by Cambridge University Press:  22 May 2014

Simona Soldi ,
Maïca Clavel ,
Andrea Goldwurm ,
Mark R. Morris ,
Gabriele Ponti ,
Régis Terrier  and
Guillaume Trap
Simona Soldi
Affiliation:
AstroParticule et Cosmologie, Univ. Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10 rue A. Domon et L. Duquet, 75205 Paris Cedex 13, France email: soldi@apc.univ-paris7.fr
Maïca Clavel
Affiliation:
AstroParticule et Cosmologie, Univ. Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10 rue A. Domon et L. Duquet, 75205 Paris Cedex 13, France email: soldi@apc.univ-paris7.fr Service d'Astrophysique/IRFU/DSM, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
Andrea Goldwurm
Affiliation:
AstroParticule et Cosmologie, Univ. Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10 rue A. Domon et L. Duquet, 75205 Paris Cedex 13, France email: soldi@apc.univ-paris7.fr Service d'Astrophysique/IRFU/DSM, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France
Mark R. Morris
Affiliation:
Dep. of Physics and Astronomy, University of California, Los Angeles, CA 90095, USA
Gabriele Ponti
Affiliation:
Max-Planck-Institut für extraterrestrische Physik, D-85748, Garching bei München, Germany
Régis Terrier
Affiliation:
AstroParticule et Cosmologie, Univ. Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10 rue A. Domon et L. Duquet, 75205 Paris Cedex 13, France email: soldi@apc.univ-paris7.fr
Guillaume Trap
Affiliation:
AstroParticule et Cosmologie, Univ. Paris Diderot, CNRS/IN2P3, CEA/Irfu, Observatoire de Paris, Sorbonne Paris Cité, 10 rue A. Domon et L. Duquet, 75205 Paris Cedex 13, France email: soldi@apc.univ-paris7.fr Service d'Astrophysique/IRFU/DSM, CEA Saclay, 91191 Gif-sur-Yvette Cedex, France Unité de physique, Palais de la découverte - Universcience, 75008 Paris, France
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Abstract

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The bulk of the FeKα emission detected in the central molecular zone (CMZ) is thought to be associated with reflection by the central molecular clouds of enhanced past emission from an external X-ray source, most likely Sgr A*. In order to follow the propagation of the reflected emission through the Galactic center (GC), we analyzed all XMM-Newton observations carried out from 2000 to 2012. Preliminary results indicate that while most of the regions that were bright at 6.4 keV in 2000–2001 have a significantly lower flux in 2012, a few other experienced a flux increase. We report for the first time a significant decrease of the FeKα emission in the Sgr C complex, supporting the reflection origin of the 6.4 keV emission detected in this region.

Keywords

ISM: reflection nebulaeGalaxy: centerX-rays: ISMsurveysradiation mechanisms: nonthermal
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 9 , Symposium S303: The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus , October 2013 , pp. 94 - 96
Copyright
Copyright © International Astronomical Union 2014 

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