------------------------------------------------------------------------
 jetmap.tex ApJ, submitted
From: "Sera Markoff" <sera@science.uva.nl>
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%astro-ph/0702637


\title[Size constraints on the jets of Sgr A*
]{How to hide large
  scale outflows: size constraints on the jets
of Sgr A*}
\author[Markoff, Bower \& Falcke]{Sera
Markoff$^{1}$\thanks{E-mail:
sera@science.uva.nl; gbower@astro.berkeley.edu;
falcke@astron.nl}, Geoffrey C. Bower$^{2}$  and
Heino Falcke$^{3}$\\
$^{1}$Astronomical Institute ``Anton
Pannekoek'', University of
  Amsterdam, Kruislaan 403, 1098SJ Amsterdam,
the Netherlands\\
$^{2}$601 Campbell Hall, Astronomy Department \&
Radio Astronomy Lab,
  Berkeley, CA 94720, USA\\
$^{3}$ Department of  Astrophysics, Radboud
University, Postbus 9010, 6500GL Nijgmegen;
  ASTRON, Postbus 2, 7990AA Dwingeloo, the
Netherlands}
\begin{document}

\date{}

\pagerange{\pageref{firstpage}--\pageref{lastpage}}
\pubyear{2002}

\maketitle

\label{firstpage}

\begin{abstract}
Despite significant strides made towards
understanding accretion,
outflow, and emission processes in the Galactic
Center supermassive
black hole Sagittarius A*, the presence of jets
has neither been
rejected nor proven.  We investigate here
whether the combined
spectral and morphological properties of the
source at radio through
near infrared wavelengths are consistent with
the predictions for
inhomogeneous jets.  In particular, we construct
images of jets at a
wavelength of 7mm based on models that are
consistent with the
spectrum of Sgr A*.  We then compare these
models through closure
quantities with data obtained from the Very Long
Baseline Array at
7mm.  We find that the best-fit jet models give
comparable or better
fits than best-fit Gaussian models for the
intrinsic source found in
previous analyses.  The best fitting jet models
are bipolar, are highly
inclined to the line of sight ($\theta \ga
75^\circ$), may favor a
position angle on the sky of $105^\circ$, and
have compact bases with
sizes of a few gravitational radii.
\end{abstract}

\begin{keywords}
galaxies: jets --- galaxies: active --- black
hole physics --- Galaxy: nucleus --- radiation
mechanisms:
non-thermal
\end{keywords}