PerspectiveAstronomy

The Hunt for Intermediate-Mass Black Holes

See allHide authors and affiliations

Science  28 Jan 2005:
Vol. 307, Issue 5709, pp. 533-534
DOI: 10.1126/science.1107110

You are currently viewing the summary.

View Full Text

Log in to view the full text

Log in through your institution

Log in through your institution

Summary

Two types of black holes-stellar black holes and supermassive black holes-are known to exist in the universe. This leaves a large gap in the black hole mass distribution. In her Perspective, Fabbiano investigates whether ultraluminous x-ray sources may be the missing intermediate-mass black holes. She concludes that the evidence is inconclusive; most ultraluminous x-ray sources can be explained without resorting to the intermediate-mass black hole hypothesis, but some of the brightest sources may indeed be intermediate-mass black holes.