Publication date: Dec 2015
Abstract:
We study the shadow of the rotating black hole with quintessential
energy i) in vacuum and ii) in the presence of plasma with radial
power-law density. For vacuum case the quintessential field parameter of
the rotating black hole sufficiently changes the shape of the shadow.
With the increasing the quintessential field parameter the radius of the
shadow also increases. With the increase of the radius of the shadow of
the rotating black hole the quintessential field parameter causes
decrease of the distortion of the shadow shape: In the presence of the
quintessential field parameter the shadow of fast rotating black hole
starting to become more close to circle. The shape and size of shadow of
quintessential rotating black hole surrounded by plasma depends on i)
plasma parameters, ii) black hole spin and iii) quintessential field
parameter. With the increase of the plasma refraction index the apparent
radius of the shadow increases. However, for the big values of the
quintessential field parameter the change of the black hole shadow’s
shape due to the presence of plasma is not sufficient. In other words:
the effect of the quintessential field parameter becomes more dominant
with compare to the effect of plasma.
Authors:
Abdujabbarov, Ahmadjon; Toshmatov, Bobir; Stuchlík, Zdeněk; Ahmedov, Bobomurat;