News of the WeekAstrophysics

Galaxies, Black Holes Shared Their Youths

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Science  16 Jun 2000:
Vol. 288, Issue 5473, pp. 1946-1947
DOI: 10.1126/science.288.5473.1946b

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ROCHESTER, NEW YORK-- The origin of massive black holes and the galaxies that surround them is a chicken-and-egg conundrum. Now, researchers reported here last week at a meeting of the American Astronomical Society that giant black holes and their host galaxies appear to be cosmic siblings that grew up at the same time. That conclusion rests on a newly unveiled relationship between the masses of black holes and how tightly gravity binds together the billions of stars around them.