176 citations · 256 across the 18 of their papers we have counts for
18 papers
Generic Peculiar Motions in FLRW Spacetimes
Bahram Mashhoon
In the standard Friedmann-Lemaître-Robertson-Walker (FLRW) spacetime, we consider a local cosmic test mass that is boosted in some direction relative to the standard comoving obser…
Modification of Aberration due to the Helicity-Rotation Coupling
Bahram Mashhoon
We review the physical basis for the assumption of locality in relativistic physics and its connection with the aberration of starlight. As a consequence of the hypothesis of local…
Schwarzschild Spacetime and the Local Limit of Nonlocal Gravity
Yahya Mohammadi, Javad Tabatabaei, Shant Baghram +1
We investigate static spherically symmetric solutions within the framework of the local limit of nonlocal gravity. This theory departs from Einstein's general relativity (GR) throu…
Cosmic Jets in General Relativity
Bahram Mashhoon
In certain general relativistic time-dependent gravitational fields, free test particles can asymptotically line up relative to fiducial static observers and produce a cosmic jet w…
Gödel's Universe and the Local Limit of Nonlocal Gravity
Z. Mardaninezhad, B. Mashhoon
We consider the Gödel universe within the context of the local limit of nonlocal gravity. This theory differs from Einstein's general relativity (GR) through the existence of a sca…
Inertia
Bahram Mashhoon
Inertia of a particle is due to its mass as well as intrinsic spin. The latter is revealed via the coupling of intrinsic spin with rotation. The spin-rotation coupling and the conc…
Elliptically Polarized Plane Gravitational Waves
Masoud Molaei, Shant Baghram, Bahram Mashhoon
Exact plane gravitational radiation fields are presented within the framework of general relativity and their properties are described. The physics of nonlinear elliptically polari…
Local Peculiar Motions in McVittie and LTB Spacetimes
Masoud Molaei, Shant Baghram, Bahram Mashhoon
We consider two inhomogeneous cosmological models, namely, the flat McVittie spacetime and a simple specific LTB spacetime. Relative to the world line of a reference comoving obser…
Spin-of-Light Gyroscope and the Spin-Rotation Coupling
Bahram Mashhoon, Yuri N. Obukhov
We discuss the coupling of photon spin with rotation in connection with a recent proposal of Fedderke et al. [arXiv:2406.16178 [physics.optics]] regarding a precision gyroscope bas…
McVittie-Plummer Spacetime: Plummer Sphere Immersed in the FLRW Universe
Javad Tabatabaei, Shant Baghram, Bahram Mashhoon
The McVittie-Plummer spacetime is a spherically symmetric inhomogeneous cosmological model that represents a spherical star system embedded in a standard FLRW cosmological model. W…
Rotational Doppler Effect and Spin-Rotation Coupling
Bahram Mashhoon
The Rotational Doppler Effect (RDE) involves both the orbital angular momentum of electromagnetic radiation as well as its helicity. The RDE phenomena associated with photon helici…
Review of the Gravitomagnetic Clock Effect
Lorenzo Iorio, Bahram Mashhoon
The general relativistic gravitomagnetic clock effect, in its simplest form, consists of the non-vanishing difference in the orbital periods of two counter-orbiting objects moving…
Mach's Principle and the Origin of Inertia
B. Mashhoon
The current status of Mach's principle is discussed within the context of general relativity. The inertial properties of a particle are determined by its mass and spin, since these…
Nonlocal Transformations for Accelerated Observers
Bahram Mashhoon
According to the locality postulate of special relativity, the measurements of physical fields by accelerated observers at a given event in Minkowski spacetime are related to each…
Gravitoelectromagnetism: A Brief Review
Bahram Mashhoon
The main theoretical aspects of gravitoelectromagnetism ("GEM") are presented. Two basic approaches to this subject are described and the role of the gravitational Larmor theorem i…
Gravitoelectromagnetism
Bahram Mashhoon
Gravitoelectromagnetism is briefly reviewed and some recent developments in this topic are discussed. The stress-energy content of the gravitoelectromagnetic field is described fro…
Chaos in the Kepler System
C. Chicone, B. Mashhoon, D. G. Retzloff
The long-term dynamical evolution of a Keplerian binary orbit due to the emission and absorption of gravitational radiation is investigated. This work extends our previous results…
Gravitational Ionization: Periodic Orbits of Binary Systems Perturbed by Gravitational Radiation
C. Chicone, B. Mashhoon, D. Retzloff
The long term perturbation of a Newtonian binary system by an incident gravitational wave is discussed in connection with the issue of gravitational ionization. The periodic orbits…