Bimodal behavior of accretion disks - Theory and application to Cygnus X-1 transitions

Details Bimodal behavior of accretion disks - Theory and application to Cygnus X-1 transitions Bimodal behavior of accretion disks - Theory and application to Cygnus X-1 transitions

Jun 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977apj...214..840i&link_type=abstract

Astrophysical Journal, Part 1, vol. 214, June 15, 1977, p. 840-855. Research supported by the Japan Society for the Promotion o

Astronomy and Astrophysics

Astronomy

428

Binary Stars, Black Holes (Astronomy), Magnetohydrodynamic Turbulence, Stellar Mass Accretion, X Ray Sources, Angular Momentum, Astronomical Models, Conservation Laws, Thermal Stability, X Ray Spectra

Scientific paper

A theory of Newtonian accretion disks is developed based on an explicit formulation of viscous stresses arising from turbulent magnetic fields which are generated by Keplerian differential rotation of plasmas. It is particularly pointed out that two physically distinct states exist in the middle part of the accretion disk surrounding a black hole; a transition from one state to the other takes place when the physical conditions of the accreting gas near the disk outer boundary cross over the critical conditions separating the two states. The thermal stability of those states is examined. It is also found that within a certain inner radius, the disk develops into a single high-temperature state, irrespective of the critical conditions; copious emission of hard X-rays arises from this inner domain. These results are applied to construct a definite numerical model of Cyg X-1 accounting for observed features of its transitions, such as magnitudes and spectral distributions of the X-ray luminosity, transition times, and variabilities. The possibility of transient X-ray sources associated with accretion onto black holes is predicted.

Affiliated with

Also associated with

No associations

Rating

Bimodal behavior of accretion disks - Theory and application to Cygnus X-1 transitions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Bimodal behavior of accretion disks - Theory and application to Cygnus X-1 transitions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Bimodal behavior of accretion disks - Theory and application to Cygnus X-1 transitions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1593735