Engineering topics

Vishveshwara, C. V.

Publications and source records attributed to Vishveshwara, C. V..

6 records

NASA NTRS1973

Vector and tensor radiation from Schwarzschild relativistic circular geodesics.

A technique developed by Regge and Wheeler (1957) is applied in the Schwarzschild background geometry to treat the radiation emitted by a test particle moving at a speed close to the local speed of light in the vicinity of a black hole. An analytic expression is obtained for the gravitational and electromagnetic radiation spectrum of a particle traveling in a highly relativistic orbit around a Schwarzschild blac hole.

Breuer, R. A.↗

NASA NTRS1973

Polarization of synchrotron radiation from relativistic Schwarzschild circular geodesics.

The pattern of geodesic synchrotron radiation emitted by a charge in an orbit close to the circular photon orbit at 3M around a nonrotating black hole of mass M is studied. The analysis is carried out using Stokes parameters, which completely characterize the state of the wave. The linear polarization, as observed at infinity, is total in the orbital plane and not smaller than 90% at the half-width of the beam. At the poles, pure circular polarization would be observed. In the region between the orbit plane and the poles the polarization shows features not present in ordinary synchrotron radiation. In our model, parameters more sensitive to deviations from the orbital plane are the Stokes parameter s (sub 2) and the tilt angle of the polarization ellipse.

Breuer, R. A.↗

NASA NTRS1972

Polarization of gravitational synchrotron radiation.

Development of a method of analysis of gravitational polarization in terms of Stokes parameters similar to those used for the electromagnetic case. Analytical expressions for these parameters are obtained for the gravitational synchrotron radiation corresponding to the Schwarzschild black-hole model. It is shown that interference between odd- and even-parity terms makes a significant contribution to the angular dependence of the polarization.

Breuer, R. A.↗

NASA NTRS1970

Differential equations for perturbations on the Schwarzschild metric

Differential equations for odd and even parity Regge-Wheeler perturbations on Schwarzschild metric

Edelstein, L. A.↗

NASA NTRS1970

Stability of the Schwarzschild metric

Schwarzschild exterior metric stability against perturbations from asymptotic behavior of Einstein field equations solution in Kruskal coordinates

Vishveshwara, C. V.↗

NASA NTRS1968

Generalization of the ''Schwarzschild surface'' to arbitrary static and stationary metrics.

Generalized Schwarzschild surface defined for static metrics, discussing distinctions between static and stationary cases

Vishveshwara, C. V.↗