accretion, accretion disksblack hole physicsX‐rays: binariesX‐rays: individual (MAXI J1543‐564Over the past 20 years, a consistent phenomenology has been established to describe the variability properties of black hole X-ray binaries. However, the physics behind the observational data is still...
This process of particles colliding, exchanging energy and falling over the event horizon – accretion – takes a very long time. We’re talking millions of years just to get a black hole to a size where it can snack on a passing gas cloud that drifts too close. How much matter can ...
on average, both black hole accretion and star formation grow at similar rates, perhaps related to how material flow into the respective regions. X-ray data from the Chandra X-ray Observatory are
Several black hole X-ray transients have a very long recurrence time, decades of years [2]. We interpret this as a marginal occurrence of a dwarf nova type disk instability in the cool outer accretion disk. We compute how the recurrence time varies with the mass overflow rate from the ...
We define the efficiency of the disk, η, by L=ηṀc2, where Ṁ is the mass accretion rate onto the black hole and L is the total power output of the accretion disk (summing over all forms including radiation and the kinetic energy of any outflows). The assumptions of the ...
讲座论坛简介 Black hole accretion is a fundamental physical process in the universe. It plays an important role in many fields of astrophysics, ranging from AGNs, black hole X-ray binaries, Gamma-ray bursts, to tidal disruption events. Many important progresses have been made in recent years,...
accretion flow. This is done by applying a general relativistic radiative transfer to general relativistic magnetohydrodynamic simulations for an RIAF surrounding a rotating black hole (Supplementary Information section9). The boundary between the accretion flow and jet is defined as the surface where ...
which demonstrates that modern all-sky surveys have much to reveal. The black hole in this quasar accretes around one solar mass per day onto an existing mass of∼17 billion solar masses. In this process, the accretion disk alone releases a radiative energy of 2 × 1041 W. If th...
black hole, its spinJor by the specific mass ratios of the initial and final states. There are strong indications that the creation of a naked singularity (NS) through a conversion process from an extremeBHis forbidden and that no accretion process can bring aBHinto aNSstate, while the ...
The so-called accretion flow that powers the growth of supermassive black holes in galaxy centres is assumed to be dominated by a smooth, steady flow of very hot plasma, but now observations instead reveal a clumpy accretion of very cold molecular clouds