[PDF] Top 20 Stationary Black Holes and Light Rings

... ringdown and shadow of the astrophysically significant Kerr black hole (BH) are both intimately connected to a special set of bound null orbits known as light rings ...A stationary, ... See full document

... the stationary scalar clouds on Kerr, ...horizon and strong oscilla- tions near the Cauchy horizon, should be generic for any test field obeying the synchronization condition (on the event horizon) ... See full document

... for light at high ...Relativity and with matter obeying all energy con- ditions, called Kerr BHs with scalar hair [32–34] , have been stud- ...mass and angular ... See full document

... These hairy BH solutions have a relation with the physical phe- nomenon of superradiance [ 67 ], from which they can form dy- namically from the Kerr solution [ 45 – 47 ] – see also [ 54 , 57 ] for a discussion on the ... See full document

... (RN) black hole, we show the existence of normalisable zero modes, dubbed non- Abelian magnetic stationary ...charged and asymptotically flat black holes with non-Abelian ...hairy ... See full document

... ratio and it includes overcharged ...(RN and hot ...fat rings, thin rings] playing the role of [RN, cold scalarised, hot scalarised] ... See full document

... of stationary clouds of a given test field, as a zero-mode of the superradiant instability, indicates the existence of new families of “hairy” BH solutions, at fully nonlinear level, such as the Kerr BHs with ... See full document

... Kerr black holes (BHs). These are stationary, asymptotically flat BH spacetimes that are solutions of general relativity minimally coupled to a massive, complex scalar field: Kerr BHs with scalar ... See full document

... stable light rings allows for the existence of pockets in the effective potential leading to quasibound orbits, which are strongly correlated to the chaotic ...potential and the corresponding point ... See full document

... shadows and lensing of six solutions, marked in ...lensing and shadows appear to display a rotation effect, similar to that in ...is stationary and not dynamical, in contrast to the ... See full document

... for stationary solutions, and hence we need a numerical approach that can solve a set of coupled elliptic PDEs, rather than hyperbolic-like PDEs, as in a time evolution ...elliptic and parabolic ... See full document

... a stationary and axisymetric spacetime, imposing that at the conformal boundary the metric is AdS and the maxwell field behaves as a localized ...a black hole is formed in the ...the ... See full document

... (KN) black holes (BHs) family [1,2] plays a central role in our understanding of BH ...of stationary, asymptotically flat, regular (on and outside the horizon) BHs with synchronized hair [4–10] ... See full document

... s and vH . Also, notice that both the sphericity s and v H are not constant along the Smarr line and slighly larger values of both these quantities are allowed for embeddable BHs when α/M 2 is ... See full document

... even light. These objects would be baptized as Black Holes ...possible and this region is known as ...the black hole, the other can escape to outside of the ergoregion and arise ... See full document

... blue and upper light blue shaded regions) in an M versus ΩH diagram, both in units of the scalar field mass ...bottom light blue shaded region corresponds to vacuum Kerr BHs which is limited by a ... See full document

... flat and regular on and outside the event ...a stationary scalar cloud in the linear theory [20,21,12,22–24] , and reduce to boson stars [25] , horizonless gravitating solitons, when the ... See full document

... Among other possible cases of radiation amplification, the phenomena worked out throughout this work is an example of rotational superradiance. As the name suggests, it occurs in the presence of “rotating” objects, as is ... See full document

... Kerr black holes with scalar hair ...BHs and boson stars (BSs), so we start by investigating the lensing of light due to ...Einstein rings and multiple images of the whole ... See full document

... a stationary configuration soon after ...back and forth across the spatially finite ...shell and back, t  80M and 60M, respectively, for models IN1 and ...pulse, and so ... See full document