Zobrazeno 1 - 10
of 12
pro vyhledávání: '"Ashok B. Joshi"'
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 4, Pp 1-10 (2024)
Abstract We investigate the gravitational field of a charged, non-vacuum, non-rotating, spherically symmetric body of mass M assuming a static solution to the Einstein–Maxwell field equations. We show the characteristics of perihelion precession of
Externí odkaz:
https://doaj.org/article/f980a2f45094418697bea3a5b179c82e
Autor:
Parth Bambhaniya, Ashok B. Joshi, Dipanjan Dey, Pankaj S. Joshi, Arindam Mazumdar, Tomohiro Harada, Ken-ichi Nakao
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 84, Iss 2, Pp 1-7 (2024)
Abstract The general theory of relativity predicts the relativistic effect in the orbital motions of S-stars which are orbiting around our Milky-way Galactic Center. The post-Newtonian or higher-order approximated Schwarzschild black hole models have
Externí odkaz:
https://doaj.org/article/44a0e8dae8d3493eb038cf9b21427b15
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 82, Iss 9, Pp 1-10 (2022)
Abstract In this paper, we investigate the light trajectories and shadow properties in the rotating version of null naked singularity (NNS) spacetime which is derived using the Newman–Janis algorithm without complexification method. We discuss some
Externí odkaz:
https://doaj.org/article/eae2664fe3f245e79edf1a1e429e8262
Autor:
Parth Bambhaniya, Divyesh N. Solanki, Dipanjan Dey, Ashok B. Joshi, Pankaj S. Joshi, Vishva Patel
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-11 (2021)
Abstract Astrometric observations of S-stars provide a unique opportunity to probe the nature of Sagittarius-A* (Sgr-A*). In view of this, it has become important to understand the nature and behavior of timelike bound trajectories of particles aroun
Externí odkaz:
https://doaj.org/article/a7287664d0d04bfb89e2e66d81ddd26e
Publikováno v:
Physical Review D. 106
In the present paper, we study the thermal properties of the geometrically thin accretion disks surrounding the null naked singularity (NNS) and the first type of Joshi-Malafarina-Narayan (JMN1) spacetimes and compare the results with the accretion d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::dae871faddb58304e3680b13c2409a6e
https://doi.org/10.1103/physrevd.106.044036
https://doi.org/10.1103/physrevd.106.044036
Autor:
Aadarsh Mehta, Parth Bambhaniya, Ashok B. Joshi, Divyesh N. Solanki, Dipanjan Dey, Pankaj S. Joshi
It is now known that the shadow is not only the property of a black hole, it can also be cast by other compact objects like naked singularities. However, there exist some novel features of the shadow of the naked singularities which are elaborately d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f4e137ca5c830cd5b7b7602a8db4af8e
http://arxiv.org/abs/2101.03865
http://arxiv.org/abs/2101.03865
In this paper, we investigate the properties of the Lense-Thirring precession frequency and periastron precession of the relativistic bound orbits in slowly rotating naked singularity spacetimes. We show that the precession frequencies of a stationar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::851e06aec856a1dde3c7e2415e2ae6fb
Autor:
Dipanjan Dey, Pankaj S. Joshi, Parth Bambhaniya, Ashok B. Joshi, Divyesh N. Solanki, Vishwa Patel
Publikováno v:
European Physical Journal C: Particles and Fields, Vol 81, Iss 3, Pp 1-11 (2021)
European Physical Journal
European Physical Journal
Astrometric observations of S-stars provide a unique opportunity to probe the nature of Sagittarius-A* (Sgr-A*). In view of this, it has become important to understand the nature and behavior of timelike bound trajectories of particles around a massi
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::ca75aaf3cc81d57c4fd41e1020962e2d
http://arxiv.org/abs/2007.12086
http://arxiv.org/abs/2007.12086
It is generally believed that the shadows of either a black hole or naked singularity arise due to photon spheres developing in these spacetimes. Here we propose a new spherically symmetric naked singularity spacetime solution of Einstein equations w
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::78acdd069d7ab2d0349125f5cfccdf28
Publikováno v:
Physical Review D. 100
In this paper, we derive the solutions of orbit equations for a class of naked singularity spacetimes, and compare these with timelike orbits, that is, particle trajectories in the Schwarzschild black hole spacetime. The Schwarzschild and naked singu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::9e7882c7ecd1ae46badb7d79b485219e
https://doi.org/10.1103/physrevd.100.124020
https://doi.org/10.1103/physrevd.100.124020