Research report 2005 - Max Planck Institute for Extraterrestrial Physics

The blue stars around the supermassive black hole of M31

Bender, Ralf; Saglia, Roberto P.

Optische und Interpretative Astronomie (Prof. Dr. Ralf Bender)
MPI für extraterrestrische Physik, Garching

Hubble Space Telescope observations reveal that the Andromeda galaxy harbours a central supermassive black hole of 140 million solar masses. The new data exclude astrophysical alternatives to a black hole. The black hole is surrounded by a tiny disk of young stars whose origin remains enigmatic.

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