Quasars or quasi-stellar radio sources are the most energetic and distant
members of a class of .... Quasars inhabit the very center of active, young
galaxies, and are among the most luminous, power...
Quasars appear to be. very distant, intrinsically ... the central nuclei of very distant
, very active galaxies. .... A short period of extremely rapid expansion when the
universe was very young. .... the Moon's distance from Earth varies from eclipse
to eclipse. .... its total energy output emitted into space.
Active galaxies typically look like galaxies, whereas quasars are often so ...
periods of time has shown that the energy emission often varies over time. ...
These rather rapid fluctuations lead us to conclude that the source of energy ....
Thus, even neglecting its nonstellar spectrum, the total energy output of an active
Active galactic nuclei (AGN) involve the most powerful, steady sources of
luminosity in the Universe. ... The power output of AGN is often variable on time
scales of years and ... Causality implies that an object that varies rapidly in time t
must be smaller ... The gravitational energy liberated during accretion onto a
black hole is ...
The high-energy non-stellar activity in some galactic nuclei seems even more
mysterious. ... this implied that quasars were much more luminous than ordinary
galaxies, and ... Rapidly variable X-rays could be either synchrotron-type
radiation, ... when its power output (derived primarily from gravitational binding
B) cause both galaxies to collapse into a supermassive black hole. ... 16) What is
implied about an active galaxy or quasar that varies its energy output rapidly?
Active galaxies provide a prime example of high-energy processes operating in
the ... of starburst galaxies and the four main classes of active galaxies (quasars,
... An active galaxy may be regarded as a normal galaxy plus an AGN with its .....
The broad lines imply that the gas must be either extremely hot or in rapid motion.
Sep 14, 2015 ... 1011.5M⊙, rapid BH growth leads to the suppression of star formation and
reduced growth of ... Key words: black hole physics, galaxies: formation, galaxies:
active, methods: hy- ... tional support, since the bulk of energy output from
quasars .... the Bondi accretion rate or its extension, usually referred to.
galaxy by accretion with a 10% mass-to-energy conversion efficiency implies that
its putative supermassive black hole (SMBH) grew by ∼ 6 × 108 M⊙ over the ...
Active Galactic Nuclei: individual (MS0735.6+7421). 1. .... We show that both the
energy and power output from AGN determined using X-ray .... The implied.
Mar 2, 2006 ... ... its discovery in 1963. Quasars are found in the center of some galaxies ... Its
light output corresponds to 1014 times that of the Sun. ... It was also soon
discovered that 3C 273 varies in ... of energy can be released by matter in a very
small volume, ... black hole that is implied by this reasoning is about one.