Low Accretion Rate? Why Super Massive Black Holes Are On A Diet

A long-standing mystery has been why most super massive black holes (SMBH) at the centers of galaxies have such a low accretion rate; they swallow very little of the cosmic gases available and instead act as if they are on a severe diet. The signature X-ray emissions from super massive black holes, which come from an area much larger than the black holes themselves, are often so surprisingly faint that the objects are difficult to distinguish from their galaxy centers. There has been a big mystery about why most of these black hole signals are so faint. read more

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