The role of the outer boundary condition in accretion disk models

Details The role of the outer boundary condition in accretion disk models The role of the outer boundary condition in accretion disk models

Mar 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aipc..556...93y&link_type=abstract

EXPLOSIVE PHENOMENA IN ASTROPHYSICAL COMPACT OBJECTS: First KIAS Astrophysics Workshop. AIP Conference Proceedings, Volume 556,

Astronomy and Astrophysics

Astrophysics

Radiation Mechanisms, Polarization, Accretion And Accretion Disks, Black Holes

Scientific paper

Taking optically thin accretion flows as an example, we investigate the effects of the outer boundary condition (OBC) on the dynamics and the emergent spectra of accretion flows. We find that OBC plays an important role. This is because the accretion equations describing the behavior of accretion flows are a set of differential equations, therefore, accretion is intrinsically an initial-value problem. The result means that we should seriously consider the initial physical state of the accretion flow such as its angular momentum and its temperature. An application example to Sgr A* is presented. .

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