The Galactic Center Black Hole

Details The Galactic Center Black Hole The Galactic Center Black Hole

Aug 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999pcim.conf...69e&link_type=abstract

The Physics and Chemistry of the Interstellar Medium, Proceedings of the 3rd Cologne-Zermatt Symposium, held in Zermatt, Septemb

Physics

Scientific paper

The dark mass at the center of the Milky Way is currently the most compelling case for a massive black hole. The initial evidences for such an object have now been confirmed after over 6 years of high spatial resolution, near-infrared imaging and spectroscopy. These observations have made it possible to measure stellar velocities down to separations of less than five light days from the compact radio source SgrA* at the dynamic center of the Milky Way. These confirmed measurements imply the presence of a central dark mass of 2.6 times 10^6 solar masses. Simple physical considerations show that this dark mass cannot consist of a stable cluster of stars, stellar remnants, substellar condensations or a degenerate gas of elementary particles. Balance of momentum and/or energy suggests that at least 10 ^3 to 10 ^5 solar masses must be associated with SgrA* itself and likely is enclosed within less than 15 Schwarzschild (8 light minutes) radii of a million solar mass black hole.

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