Electromagnetism in Curved Space-Time: Coupling Doppler Shifts and Gravitational Redshifts
نویسندگان
چکیده
We present the basic prerequisites of electromagnetism in flat spacetime and provide description terms Faraday tensor. generalise electromagnetic theory to a general relativistic setting, introducing Einstein field equations describe propagation radiation curved space-time. investigate gravitational redshift derive formulae for combined effect Doppler shift spacetime.
منابع مشابه
Geometric Interpretation of Electromagnetism in a Gravitational Theory with Space–Time Torsion
A complete geometric unification of gravity and electromagnetism is proposed by considering two aspects of torsion: its relation to spin established in Einstein–Cartan theory and the possible interpretation of the torsion trace as the electromagnetic potential. Starting with a Lagrangian built of Dirac spinors, orthonormal tetrads, and a complex rather than a real linear connection we define an...
متن کاملString Theory in Curved Space-time
Intrinsic and extrinsic geometric properties of string world sheets in curved space-time background are explored. In our formulation, the only dynamical degrees of freedom of the string are its immersion coordinates. Classical equation of motion and the space-time energy-momentum tensor of the string are obtained. The equations of motion for the extrinsic curvature action are second order for t...
متن کاملGravitational Redshifts in Simulated Galaxy Clusters
We predict the amplitude of the gravitational redshift of galaxies in galaxy clusters using an N-body simulation of ΛCDM universe. We examine if it might be possible to detect the gravitational effect on the total redshift observed for galaxies. For clusters of mass M ∼ 10hM⊙, the difference in gravitational redshift between the brightest galaxy and the rest of the cluster members is ∼ 10 km s....
متن کاملSpace-doppler Parameter Estimation for Space-time-doppler Reception in Time-varying Multipath Ds-cdma Systems
In this paper we propose a joint space-Doppler parameter estimation algorithm for fast-fading multipath DS-CDMA communication systems. The Doppler shifts induced by the relative motion between the transmitter and the receiver, together with the associated direction-of-arrival (DOA), are jointly estimated by a semi-blind subspace-type method. The Doppler effect is successfully eliminated by a sp...
متن کاملJoint maximum likelihood estimation of time delays and Doppler shifts
This paper deals with the problem of estimating the amplitudes, time delays and Doppler shifts of a set of known signals received by an array of antennas in temporally white but spatially colored noise. Applying the Maximum Likelihood approach, the estimation reduces to an optimization problem where the nonlinear parameters such frequency shifts and delays are jointly estimated by means of a mi...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: IEEE Antennas and Propagation Magazine
سال: 2021
ISSN: ['1045-9243', '1558-4143']
DOI: https://doi.org/10.1109/map.2021.3099714