Free Access
Astron. Astrophys. Suppl. Ser.
Volume 119, Number 2, October_II 1996
Page(s) 293 - 306
Published online 15 October 1996
The flashy disappearance of a star falling behind the horizon of a black hole DOI: 10.1051/aas:1996246

Astronomy and Astrophysics Supplement Series, Vol. 119, October II 1996, 293-306

The flashy disappearance of a star falling behind the horizon of a black hole

A. Cadez and A. Gomboc
Send offprint requests to: A. Cadez

University of Ljubljana, Department of Physics, Jadranska 19, 61000 Ljubljana, Slovenia

Received December 6, 1995; accepted March 7, 1996


We present calculations and images of the appearance of a point-like star while heading toward and disappearing behind the horizon of a Schwarzschild black hole. A complete review of equations of motion and their solutions is given in Sect. 2, and Sect. 3 describes the properties of the star as the light source. The results of numerical simulations are shown in 26 figures and some phenomena responsible for their appearance are discussed in Sect. 4. It is possible that such phenomena are relevant for the description of certain activities related to galactic black holes and also for the description of -ray burstars.

Key words: black holes physics --- gravitational lensing --- gamma rays: bursts

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