Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related ...

@article{30096,
   author = {Stuchlík, Zdeněk and Charbulák, Daniel and Schee, Jan},
   article_number = {3},
   doi = {http://dx.doi.org/10.1140/epjc/s10052-018-5578-6},
   keywords = {Kerr-de Sitter black holes; light escape cones; black hole shadows},
   language = {eng},
   issn = {1434-6044},
   journal = {European Physical Journal C},
   title = {Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related black hole shadows},
   url = {https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5578-6},
   volume = {78},
   year = {2018}
}

TY  - JOUR
ID  - 30096
AU  - Stuchlík, Zdeněk - Charbulák, Daniel - Schee, Jan
PY  - 2018
TI  - Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related black hole shadows
JF  - European Physical Journal C
VL  - 78
IS  - 3
SP  - "180-1"-"180-32"
EP  - "180-1"-"180-32"
SN  - 14346044
KW  - Kerr-de Sitter black holes
KW  - light escape cones
KW  - black hole shadows
UR  - https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5578-6
L2  - https://link.springer.com/article/10.1140%2Fepjc%2Fs10052-018-5578-6
N2  - We construct the light escape cones of isotropic spot sources of radiation residing in special classes of reference frames in the Kerr-de Sitter (KdS) black hole space-times, namely in the fundamental class of 'non-geodesic' locally non-rotating reference frames (LNRFs), and two classes of 'geodesic' frames, the radial geodesic frames (RGFs), both falling and escaping, and the frames related to the circular geodesic orbits (CGFs). We compare the cones constructed in a given position for the LNRFs, RGFs, and CGFs. We have shown that the photons locally counter-rotating relative to LNRFs with positive impact parameter and negative covariant energy are confined to the ergosphere region. Finally, we demonstrate that the light escaping cones govern the shadows of black holes located in front of a radiating screen, as seen by the observers in the considered frames. For shadows related to distant static observers the LNRFs are relevant.
ER  - 

STUCHLÍK, Zdeněk, Daniel CHARBULÁK a Jan SCHEE. Light escape cones in local reference frames of Kerr-de Sitter black hole spacetimes and related black hole shadows. \textit{European Physical Journal C}. roč.~78, č.~3, s.~''180-1''-''180-32'', 32 s. ISSN~1434-6044. doi:10.1140/epjc/s10052-018-5578-6. 2018.