Accretion Rates onto Massive Black Holes in Four Quiescent Elliptical Galaxies

Details Accretion Rates onto Massive Black Holes in Four Quiescent Elliptical Galaxies Accretion Rates onto Massive Black Holes in Four Quiescent Elliptical Galaxies

2000-03-02

arxiv.org/abs/astro-ph/0003016v1

Astronomy and Astrophysics

Astrophysics

with 1 figure, accepted to the Astrophysical Journal Letters

Scientific paper

10.1086/312618

Four quiescent elliptical galaxies were imaged with the NRAO VLA at 8.5 GHz. Within the context of canonical advection-dominated accretion flows (ADAFs), these VLA images plus published black hole masses constrain the accretion rates to be $ <1.6\times10^{-4}$, $ <3.6\times10^{-4}$, $\le7.8\times10^{-4}$, and $\le7.4\times10^{-4}$ of the Eddington rates. These ADAF accretion rates derived at 8.5 GHz have important implications for the levels of soft and hard X-rays expected from these quiescent galaxies.

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