The optical appearance of the stellar sky for an observer in the vicinity of a black hole is dominated by bending of light, the frequency shift, and the magnification caused by gravitational lensing and aberration. Due to the finite aperture of an observer’s eye or a telescope, Fraunhofer diffraction has to be taken into account. We have used high performance graphics hardware and developed a program that enables the user to interactively explore the stellar sky in the vicinity of a Schwarzschild black hole. To do so, we determine what an observer, who can either move quasistatically around the black hole or follow a timelike radial geodesic, would actually see.
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PAPERS| February 01 2010
Distortion of the stellar sky by a Schwarzschild black hole
Thomas Müller, Daniel Weiskopf; Distortion of the stellar sky by a Schwarzschild black hole. Am. J. Phys. 1 February 2010; 78 (2): 204–214. https://doi.org/10.1119/1.3258282
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