Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004assl..315..201s&link_type=abstract
How Does the Galaxy Work? A Galactic Tertulia with Don Cox and Ron Reynolds. Edited by Emilio J. Alfaro, Instituto de Astrofisic
Astronomy and Astrophysics
Astrophysics
Scientific paper
We review radio, X-ray and near-infrared (NIR) observations of the Milky Way's central parsec and the compact, non-thermal radio source Sagittarius A* (Sgr A*). The emphasis of this article lies on the observations of the last decade, which accumulated compelling evidence that Sgr A* is a supermassive black hole of 3.6±0.4×106 M&sun;, locatedat the dynamical centre o our galaxy. The nuclear stellar cluster shows a central cusp around Sgr A* and contains several components of young stars, which are evidence for recent star formation episodes. Recent X-ray and NIR observations of Sgr A* quiescent and flare activity provide information on emission/accretion processes happening within a few Schwarzschild radii of the central black hole.
Genzel Reinhard
Schödel Rainer
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