Bibcode
D'Onofrio, Mauro; Marziani, Paola; Sulentic, Jack W.; Dultzin, Deborah; Richards, Gordon; Knapen, Johan; Shlosman, Isaac; Morganti, Raffaella; Falomo, Renato; Hawkins, Mike; Cavaliere, Alfonso; McLure, Ross; Shields, Greg; Netzer, Hagai; Proga, Daniel; Franceschini, Alberto; Fan, Xiaoui; Elvis, Martin
Referencia bibliográfica
Fifty Years of Quasars, Astrophysics and Space Science Library, Volume 386. ISBN 978-3-642-27563-0. Springer-Verlag Berlin Heidelberg, 2012, p. 439
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2012
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Descripción
We now consider the environment of quasars in the widest possible sense,
from the circumnuclear regions to very large scales of hundreds of
kiloparsecs. The circumgalactic environment of nearby quasars has been
widely studied since the late 1960s in an attempt to test its influence
on the triggering of nuclear activity. The underlying hypothesis is that
gravitational perturbations might ease the infall of matter toward the
nucleus, providing accretion material for the central black hole.