More elaborate views of a geometrically thin and optically thick accretion disk around a Kerr black hole were obtained by Fanton et al. Colors indicate combined gravitational and Doppler shifts (from Viergutz 1993). Primary and secondary images of a simple accretion disk model around a Kerr black hole, seen by a faraway observer. The result is a colored generalization of the picture by Cunningham and Bardeen (1973) shown in 40 Years of Black Hole Imaging (1).
He treated slightly thick disks and produced colored contours, including the disk’s secondary image which wraps under the black hole (figure 2). The first simulations of the shape of accretion disks around Kerr black holes were performed by Viergutz (1993). Trip to a black hole by Robert Nemiroff, 1993.
#The black hole short film analysis movie#
He displayed computer-generated illustrations highlighting the distortion effects on a background stellar field but no accretion disk, and made a short movie now available on the internet (Nemiroff 2018), two snapshots of which are shown in figure 1. Nemiroff (1993) described the visual distortion effects to an observer traveling around and descending to the surface of a neutron star and a black hole, discussing multiple imaging, red- and blue-shifting, the photon sphere and multiple Einstein rings. Stuckey (1993) studied photon trajectories which circle a static black hole one or two times and terminate at their emission points (« boomerang photons »), producing a sequence of ring-shaped mirror images.
Then, unaware of Marck’s results, several researchers of the 1990’s were involved in the program of calculating black hole gravitational lensing effects in various situations.
#The black hole short film analysis professional#
Unfortunately Marck’s simulations of black hole accretion disks remained mostly ignored from the professional community, due to the fact that they were not published in peer-reviewed journals and, after their author prematurely died in May 2000, nobody could find the trace of his computer program… Sequel of the previous post 40 Years of Black Hole Imaging (2) : Colors and Movies 1989-1993 Generalizations to Kerr Black Holes