Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Rajibul Shaikh"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 8, Pp 1-11 (2022)
Abstract The $$\gamma $$ γ -metric is a static, axially-symmetric singular solution of the vacuum Einstein’s equations without an event horizon. This is a two-parameter family of solutions, generic values of one of which (called $$\gamma $$ γ ) m
Externí odkaz:
https://doaj.org/article/50cbacead927424e9bd9dc913faf0ccb
Publikováno v:
Physics Letters B, Vol 829, Iss , Pp 137109- (2022)
Null geodesics are invariant under a conformal transformation, and thus it might seem natural to assume that the observables corresponding to the shadow of a space-time are also conformally invariant. Here, we argue instead, that since the Arnowitt-D
Externí odkaz:
https://doaj.org/article/7741f9616c6743d5a5220a9dc4470995
Publikováno v:
Nuclear Physics B, Vol 972, Iss , Pp 115548- (2021)
In this paper, we aim to investigate various physical properties and characteristics of radiation emerging from the surface of accretion disks, in a rotating traversable axially symmetric wormhole spacetime of the Teo class. We have studied the margi
Externí odkaz:
https://doaj.org/article/a23b351b642844deb1016e4b8c4b8a00
Publikováno v:
Physics Letters B, Vol 795, Iss , Pp 29-36 (2019)
Tidal effects on self-gravitating Newtonian stars rotating around a Kerr black hole in stable spherical orbits away from the equatorial plane are exemplified by a non-vanishing Carter's constant, and are substantially different from those on the equa
Externí odkaz:
https://doaj.org/article/736ff4d469284543974a8cf246eed941
Publikováno v:
Physics Letters B, Vol 789, Iss , Pp 270-275 (2019)
Horizonless compact objects with light rings (or photon spheres) are becoming increasingly popular in recent years for several reasons. In this paper, we show that a horizonless object such as a wormhole of Morris–Thorne type can have two photon sp
Externí odkaz:
https://doaj.org/article/3155c26f11f24c0ca9dbbb2601f86dd7
Autor:
Rajibul Shaikh
Publikováno v:
The Fifteenth Marcel Grossmann Meeting.
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::1b1c31ddbbc437278880b716250ace15
https://doi.org/10.1142/9789811258251_0078
https://doi.org/10.1142/9789811258251_0078
Autor:
Rajibul Shaikh
The Event Horizon Telescope (EHT) has recently observed the image and shadow of the supermassive compact object Sagittarius A$^*$ (Sgr A$^*$). According to the EHT collaboration, the observed image is consistent with the expected appearance of a Kerr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::848ee6f74aa512f13a6e8620280a3d00
Publikováno v:
Nuclear Physics B, Vol 972, Iss, Pp 115548-(2021)
Nuclear Physics
Nuclear Physics
In this paper, we aim to investigate various physical properties and characteristics of radiation emerging from the surface of accretion disks, in a rotating traversable axially symmetric wormhole spacetime of the Teo class. We have studied the margi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::11720cfecbc9fb5948e1ec95dfa5b5cc
http://arxiv.org/abs/2110.09820
http://arxiv.org/abs/2110.09820
The recent observation of the shadow of the supermassive compact object M87$^*$ by the Event Horizon Telescope (EHT) collaboration has opened up a new window to probe the strong gravity regime. In this paper, we study shadows cast by two viable alter
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79f26973f86fe81e3892dcc08cee5037
The prospect of identifying wormholes by investigating the shadows of wormholes constitute a foremost source of insight into the evolution of compact objects and it is one of the essential problems in contemporary astrophysics. The nature of the comp
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9974eb4e129989b8314548e23c2e6f53