Crucial measurements of Sgr A* variability with XMM and VLT

Details Crucial measurements of Sgr A* variability with XMM and VLT Crucial measurements of Sgr A* variability with XMM and VLT

Oct 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010xmm..prop..192g&link_type=abstract

XMM-Newton Proposal ID #06746005

Physics

White Dwarf Binaries, Neutron Star Binaries, Cataclysmic Variables, Ulxs, Black Holes, Sgr A*, Sgr A*, Sgr A*, Sgr A*, Sgr A*

Scientific paper

We propose simultaneous XMM and VLT observations of Sgr A* to study the physical processes at work during its near-infrared/X-ray flares. The aim is to obtain for the first time accurate spectral shape of the flares simultaneously in both X-ray and NIR bands. This is the fundamental, still missing, measurement needed to constrain the flare emission mechanism, that will be within reach with the implementation of the laser guide NACO prism spectroscopy mode at the VLT at the time of the proposed observations. With this program we will also further constrain the powerful activity that Sgr A* experienced in the past, through the monitoring of long term variations of the iron line emission from the surrounding molecular clouds.

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