From liusm@stanford.edu Mon Sep 19 09:16:33 2005
Date: Sat, 17 Sep 2005 05:07:23 -0700
From: Siming Liu <liusm@stanford.edu>
To: gcnews@aoc.nrao.edu
Subject: sumit msf.tex ApJ in press

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%astro-ph/0506151
 
\begin{document}
 
\title{Stochastic Electron Acceleration During the NIR and X-ray Flares
in Sagittarius A*}
 
\author{Siming Liu,\altaffilmark{1} Fulvio Melia,\altaffilmark{2,3} and
Vah\'e Petrosian,\altaffilmark{1,4}}
 
\altaffiltext{1}{Center for Space Science and Astrophysics, Department of
Physics, Stanford
University, Stanford, CA 94305; liusm@stanford.edu}
\altaffiltext{2}{Physics Department and Steward Observatory, The
University of Arizona,
Tucson, AZ 85721; melia@physics.arizona.edu}
\altaffiltext{3}{Sir Thomas Lyle Fellow and Miegunyah Fellow.}
\altaffiltext{4}{Department of Applied Physics, Stanford University,
Stanford, CA 94305;
vahe@astronomy.stanford.edu}
 
 
\begin{abstract}
 
Recent near-IR (NIR) and X-ray observations of Sagittarius A*'s spectrum
have yielded
several strong constraints on the transient energizing mechanism,
justifying a
re-examination of the stochastic acceleration model proposed previously
for these events.
We here demonstrate that the new results are fully consistent with the
acceleration of
electrons via the transit-time damping process. But more importantly,
these new NIR and
X-ray flares now can constrain the source size, the gas density, the
magnetic field, and
the wave energy density in the turbulent plasma. Future simultaneous
multi-wavelength observations with good spectral information will, in
addition, allow us
to study their temporal evolution, which will eventually lead to an
accurate determination
of the behavior of the plasma just minutes prior to its absorption by the
black hole.
 
\end{abstract}
\end{document}