Naslov
Acoustic horizons in axially symmetric relativistic accretion

Autori
Abraham, Hrvoje ; Bilić, Neven ; Das, T.K.

Izvornik
Classical and Quantum Gravity (0264-9381) 23 (2006); 2371-2393

Vrsta, podvrsta i kategorija rada
Radovi u časopisima, članak, znanstveni

Ključne riječi
accoustic horizon; accretion

Sažetak
Transonic accretion onto astrophysical objects is a unique example of analogue black hole realized in nature. In the framework of acoustic geometry we study axially symmetric accretion and wind of a rotating astrophysical black hole or of a neutron star assuming isentropic flow of a fluid described by a polytropic equation of state. In particular we analyze the causal structure of multitransonic configurations with two sonic points and a shock. Retarded and advanced null curves clearly demonstrate the presence of the acoustic black hole at regular sonic points and of the white hole at the shock. We calculate the analogue surface gravity and the Hawking temperature for the inner and the outer acoustic horizons.

Izvorni jezik
Engleski

Znanstvena područja
Fizika

POVEZANOST RADA