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Acoustic horizons in axially symmetric relativistic accretion (CROSBI ID 117433)

Prilog u časopisu | izvorni znanstveni rad | međunarodna recenzija

Abraham, Hrvoje ; Bilić, Neven ; Das, T.K. Acoustic horizons in axially symmetric relativistic accretion // Classical and quantum gravity, 23 (2006), 2371-2393-x

Podaci o odgovornosti

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

engleski

Acoustic horizons in axially symmetric relativistic accretion

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.

accoustic horizon; accretion

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Podaci o izdanju

23

2006.

2371-2393-x

objavljeno

0264-9381

Povezanost rada

Fizika

Indeksiranost