Questions tagged [accretion]

Questions regarding the process of a massive body gaining mass from objects around it.

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How is angular momentum transferred between a neutron star and its accretion disk?

Accreting neutron stars can either gain or loose angular momentum via interaction with their accretion disks. This leads to either spin-up or spin-down. Which of the two is the case, depends on the ...
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What is the “radiation sound speed” inside an accretion column?

I was trying to read "A New Two-fluid Radiation-hydrodynamical Model for X-Ray Pulsar Accretion Columns" and its follow-up paper both by West et al. and came across a quantity called "radiation sound ...
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Can mass loss via accretion occur on stellar remnants?

We know that normal stars can lose mass to a binary companion. But can this happen to neutron stars and white dwarfs? Let's say a stellar black hole is being orbited by a white dwarf or neutron star. ...
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About the unit of magneticsphere radius calculation

The magneticsphere radius of neutron star is the formula like: Ra=[(BRns)^4/(M_dot^2GMns)]^(1/7) where Ra is the magneticsphere radius, M_dot is the accretion rate, Mns and Rns is the mass and radius ...
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What is the effect of extinction in the accretion disk for black hole mass determination?

I've created a basic model of the accretion disk (AD) by summing up blackbodies following the temperature profile of the AD according to Shakura & Sunyaev (1973) (extensively used in the ...