Image of the Schwarzschild black hole pierced by a cosmic string with a thin accretion disk

Abstract

We study the optical appearance of a thin accretion disk around a Schwarzschild black hole pierced by a cosmic string with a semi-analytic method of Luminet [11]. Direct and secondary images with different parameters observed by a distant observer is plotted. The cosmic string parameter s can modify the shape and size of the thin disk image. We calculate and plot the distribution of both redshift and observed flux as seen by distant observers at different inclination angles. Those distributions are dependent on the inclination angel of the observer and cosmic parameter s.

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• Light's Bending Angle due to Black Holes: From the Photon Sphere to Infinity
• Phase-space analysis of a class of k-essence cosmology

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• Observational properties of a Schwarzschild black hole surrounded by a Dehnen-type dark matter halo
• Thin accretion disk around Schwarzschild-like black hole in bumblebee gravity
• Images of the accretion disk in Hybrid metric-Palatini gravity