accretion disk

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accretion disk

See black hole; mass transfer; quasar.

accretion disk

[ə′krē·shən ‚disk]
(astronomy)
A viscous structure consisting of gas lost by a red giant or supergiant flowing around a companion main-sequence star or compact object (white dwarf, neutron star, or black hole).
References in periodicals archive ?
By being able to measure the distance between the black hole and the accretion disc, we believe we can more effectively measure the spin of black holes.
They are thought to arise from the interaction of the secondary star orbit with a slowly precessing eccentric accretion disc.
A quasar accretion disc has a typical size of a few light-days, or around 100 billion kilometers across, but they lie billions of light-years away.
This program has two main objectives: 1) Develop the theoretical framework to incorporate magnetic fields, and the ensuing turbulence, into self-consistent accretion disc models, and investigate their observational implications.
9, (11) where there is a relationship between eclipse depth and the precession period of the accretion disc, [P.
He also concluded that the outburst is due to a thermonuclear runaway, as there is no evidence for any accretion driven event as eclipse profiles do not reveal the presence of a notable accretion disc.
This material then flowed in towards the vampire, encircling it with a disc known as an accretion disc.
The short duration and shallow nature of the eclipses suggests that these are grazing eclipses of the accretion disc, with the binary system being only slightly above the critical inclination for eclipses to occur.
This phenomenon is known to astronomers as an accretion disc.
In the absence of a significant white dwarf magnetic field, material from the secondary passes through an accretion disc before settling on the surface of the white dwarf.
By recording the variation in colour, the team were able to reconstruct the colour profile across the accretion disc, which is important because the temperature of an accretion disc increases the closer it is to the black hole, and the colours emitted by the hot matter get bluer the hotter they are.