2004/01/04 by Ju‐Fu Lu, Ju-Fu Lu, Yi-Qing Lin +2 · 32 citations
Engineering · Physics and Astronomy · #Accretion (finance) #Advection #Astrophysical Phenomena and Observations #Astrophysics #Black hole (networking) #Boundary value problem #Heat Transfer Mechanisms #Intermediate polar #Mechanics #Nuclear physics #Optics #Physics #Plasma #Pulsars and Gravitational Waves Research #Quantum mechanics #RADIUS #Radiative cooling #Radiative transfer #Thermal #Thermal conduction #Thermodynamics #White dwarf #astro-ph
paper · pdf · doi:10.1086/382209
published in The Astrophysical Journal 602(1), L37-L40 (IOP Publishing) · 10 pages, 2 figures, accepted for publication in ApJ Letters
arxiv created 2004/01/04 · openalex publication_date 2004/02/02 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We use the standard Runge-Kutta method to solve a set of basic equations describing black hole accretion flows composed of two-temperature plasma. We do not invoke any extra energy transport mechanism, such as thermal conduction, and we do not specify any ad hoc outer boundary condition for the advection-dominated accretion flow (ADAF) solution. We find that in the case of high viscosity and nonzero radiative cooling, the ADAF solution can have an asymptotic approach to the Shakura-Sunyaev disk (SSD) solution and that the SSD-ADAF transition radius is close to the central black hole. Our results further prove the mechanism of thermal instability-triggered SSD-ADAF transition suggested previously by Takeuchi & Mineshige and Gu & Lu.