Closest safe approach to an accreting black hole

نویسندگان
چکیده

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Thin Disk Accreting Into a Black Hole

A numerical model of a steady state, thin accretion disk with a constant effective speed of sound is presented. We demonstrate that 'zero torque' inner boundary condition is a reasonable approximation provided that the disk thickness, including the thickness of the torquing magnetic fields, is small everywhere. It is likely that this conclusion is correct also for non-steady disks, as long as t...

متن کامل

Outflows Near An Accreting Black Hole: Ionization and Temperature Structures

We calculate the temperature and ionization balance in an outflow from an accreting black hole under illumination by hard radiation from the central object. Electron scattering of the FeKα photons within the highly ionized expanding flow leads to a decrease of their energy (redshift) which is of first order in v/c, when v is the outflow velocity (v is much less than the speed of light c). This ...

متن کامل

Construction of a Penrose Diagram for an Accreting Black Hole

A Penrose diagram is constructed for a spatially coherent black hole that accretes at stepwise steady rates as measured by a distant observer from an initial state described by a metric of Minkowski form. Coordinate lines are computationally derived, and radial light-like trajectories verify the viability of the diagram. Coordinate dependencies of significant features, such as the horizon and r...

متن کامل

An Operational Approach To Black Hole Entropy

In this paper we calculate the entropy of a thin spherical shell that contracts reversibly from infinity down to its event horizon. We find that, for a broad class of equations of state, the entropy of a nonextremal shell is one-quarter of its area in the black hole limit. The considerations in this paper suggest the following operational definition for the entropy of a black hole: SBH is the e...

متن کامل

Geometrically Thin Disk Accreting Into a Black Hole

A numerical model of a steady state, thin accretion disk with a constant effective speed of sound is presented. We demonstrate that ‘zero torque’ inner boundary condition is a reasonable approximation provided that the disk thickness, including the thickness of the torquing magnetic fields, is small everywhere. It is likely that this conclusion is correct also for non-steady disks, as long as t...

متن کامل

ذخیره در منابع من


  با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید

ژورنال

عنوان ژورنال: Physical Review D

سال: 2014

ISSN: 1550-7998,1550-2368

DOI: 10.1103/physrevd.90.084027