Why radio-quiet quasars are radio quiet.

Details Why radio-quiet quasars are radio quiet. Why radio-quiet quasars are radio quiet.

Dec 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996a%26as..120c.591m&link_type=abstract

Astronomy and Astrophysics Supplement, v.120, p.591-594

Physics

28

Accretion, Accretion Disks, Black Hole Physics, Galaxies: Active

Scientific paper

We calculate the effect of retrograde accretion of matter onto a rotating black hole. Accreting matter is assumed to form a geometrically thin or thick accretion disk. Exact analytical formulas are derived. It is shown that after accreting ~0.2 of its initial mass, a black hole is completely spun-down. We also perform a number of simulations in which small portions of mass are accreting with angular momentum randomly chosen: either parallel or anti-parallel with respect to the black hole's spin. Such a scenario can eventually account for the low-spin black holes postulated by Wilson & Colbert (1995ApJ...438...62W) to reside in radio-quiet quasars.

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