08 June 2009

Texas-Sized Computer Finds Most Massive Black Hole in Galaxy M87 Indicates Accepted Masses of Black Holes in Nearby Galaxies Too Low

PASADENA, Calif. — Astronomers Karl Gebhardt (The University of Texas at Austin) and Jens Thomas (Max Planck Institute for Extraterrestrial Physics) have used new computer modeling techniques to discover that the black hole at the heart of M87, one the largest nearby giant galaxies, is two to three times more massive than previously thought. Weighing in at 6.4 billion times the Sun’s mass, it is the most massive black hole yet measured with a robust technique, and suggests that the accepted black hole masses in nearby large galaxies may be off by similar amounts. This has consequences for theories of how galaxies form and grow, and might even solve a long-standing astronomical paradox.

Gebhardt will detail these results in a press conference June 8 at 12 Noon PDT at the 214th meeting of the American Astronomical Society in Pasadena, Calif. They will be published later this summer in The Astrophysical Journal, in a paper by Gebhardt and Thomas. more

Join us in celebrating the International Year of Astronomy clear across Texas!