Publications
of the
MPIfR
Optical & Infrared
Interferometry Group
Feng Yuan and J-H. Zhao:
The Structure and Variability of Sagittarius
A*: Zooming in to
the Supermassive Black Hole at the Galactic Center
Chinese Journal of Astronomy and Astrophysics,
v.93, p. 41-54 (2003)
Abstract.
The Galactic center provides a unique astrophysical laboratory
for us to study various astrophysical processes. In this paper, we
review and outline the latest results from observations of Sgr A* in
terms of source structure
and variations in flux density. Sgr A* phenomenon represents a
typical case of low radiative efficiency accretion flow surrounding a
supermassive black hole in low luminosity AGNs. Many pending
astrophysical problems found from observations of Sgr A* have
challenged the existing astrophysical theories. Current theoretical
models of Sgr A* are also reviewed.
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