I review the basic physical processes that determine the evolution of accretion discs. I first introduce the main properties of discs observed around young stars across the mass spectrum. I then turn to the analysis of the fundamental disc equations, highlighting several subtleties, in some cases rarely discussed in textbooks. I then discuss some classic accretion disc solutions, both steady state and time dependent. I emphasise the description of the outbursting FU Orionis objects, the class of protostellar objects best suited to investigating the accretion process. I discuss in some detail the possible physical mechanisms responsible for transport in accretion discs, with particular emphasis on gravitational instabilities, which are rarely discussed in this context.

Classical disc physics / G. Lodato. - In: NEW ASTRONOMY REVIEWS. - ISSN 1387-6473. - 52:2-5(2008), pp. 21-41.

Classical disc physics

G. Lodato
Primo
2008

Abstract

I review the basic physical processes that determine the evolution of accretion discs. I first introduce the main properties of discs observed around young stars across the mass spectrum. I then turn to the analysis of the fundamental disc equations, highlighting several subtleties, in some cases rarely discussed in textbooks. I then discuss some classic accretion disc solutions, both steady state and time dependent. I emphasise the description of the outbursting FU Orionis objects, the class of protostellar objects best suited to investigating the accretion process. I discuss in some detail the possible physical mechanisms responsible for transport in accretion discs, with particular emphasis on gravitational instabilities, which are rarely discussed in this context.
2008
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2434/58235
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