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 ?
They are thought to arise from the interaction of the secondary star orbit with a slowly precessing eccentric accretion disc.
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.
Because the accretion disc is rotating, the line will sometimes shine on the approaching disc material and sometimes on the receding material, making the line wobble back and forth.
These accretion discs are extremely stable from a hydrodynamic perspective as according to Kepler's laws of planetary motion angular momentum increases from the center towards the periphery," Helmholtz-Zentrum Dresden-Rossendorf physicist Dr.
9, (11) where there is a relationship between eclipse depth and the precession period of the accretion disc, [P.
The answer is that the inner flow is releasing high-energy radiation that strikes the matter in the surrounding accretion disc, making the iron atoms in the disc shine like a fluorescent light tube.
5 hour observation with XMM-Newton, caused by the uneven rim of the black hole's accretion disc briefly obscuring the X-rays as the system rotates, its disc almost edge-on along XMM-Newton's line of sight.
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 material then flowed in towards the vampire, encircling it with a disc known 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.
Summary: TEHRAN (FNA)- A team of scientists has used the NASA/ESA Hubble Space Telescope to observe a quasar accretion disc - a brightly glowing disc of matter that is slowly being sucked into its galaxy's central black hole.
First, I will develop an accretion disc model for the most luminous states of stellar mass black holes, including their high frequency quasi-periodic oscillations, motivated by simulations.