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From: FALANGA Maurizio SAp  mfalanga@cea.fr 
To: GCNEWS newsletter <gcnews@aoc.nrao.edu>
Subject: New Abstract,

\begin{document}
\title{Modulated X-ray Emissivity near the Stress Edge in Sgr A*}
\author{M. Falanga (1), F. Melia (2), M. Prescher (2), G. Belanger 
(3),
            A. Goldwurm (1)}
\institute{(1) CEA Saclay, DSM/IRFU/Service d'Astrophysique, 91191 
Gif-sur-Yvette,
             France (2) Physics Department and Steward Observatory,
             The University of
             Arizona, Tucson, AZ 85721 (3) ESA/ESAC, Apartado 50727,
             28080
             Madrid, Spain}
\begin{abstract}
Sgr A* is thought to be the radiative manifestation of a ~3.6x10E6 
Msun
supermassive black hole at the Galactic center. Its mm/sub-mm 
spectrum and
its flare emission at IR and X-ray wavelengths may be produced 
within the
inner ten Schwarzschild radii of a hot, magnetized Keplerian flow. 
The
lightcurve produced in this region may exhibit quasi-periodic 
variability.
We present ray-tracing simulations to determine the
general-relativistically modulated X-ray luminosity expected from 
plasma
coupled magnetically to the rest of the disk as it spirals inwards 
below
the innermost stable circular orbit towards the ``stress edge" in 
the case
of a Schwarzschild metric.  The resulting lightcurve exhibits a 
modulation
similar to that observed during a recent X-ray flare from Sgr A*.
\end{abstract}

\end{document}