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Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.

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At least 289 records · Page 16

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NASA NTRS1966

Effect of radiation attenuation upon the motion of a relativistic particle in a uniform field

Radiation attenuation effects upon relativistic particle motion in uniform magnetic field

PARTICLE MOTION↗

NASA NTRS1966

Compton effect on relativistic electrons in the atmosphere of the sun

Compton effect on relativistic electrons in solar atmosphere

COMPTON EFFECT↗

NASA NTRS1966

Comparison of the Newtonian and general relativistic orbits of a point mass in an inverse square law force field

Measurability of difference between orbits of two spacecrafts operating by Newtonian and relativistic mechanics

NEWTON THEORY↗

NASA NTRS1967

Braking of relativistic particles in low atmospheric layers

BREMSSTRAHLUNG↗

NASA NTRS1967

Possibility of determination of relativistic protons' content in some sources of synchrotron radiation

Method to determine content of relativistic protons and electrons in synchrotron radiation sources

SYNCHROTRON RADIATION↗

NASA NTRS1967

Landau damping in a relativistic plasma

Landau damping in relativistic plasma

LANDAU DAMPING↗

NASA NTRS1967

Relativistic Space-Times Having Corresponding Geodesics Final Report

Pairs of Relativistic Space-Times are classified according to their Segre characteristics. Suitable bases consisting of pseudo-orthonormal tetrads are constructed and the condition that the spaces should have corresponding geodesics is imposed. contain spaces with corresponding geodesics. It is found that the [3, 1] and [(3, 1)] classes contain spaces with corresponding geodesics. Of these metrics, the vacuum ones are shown to be algebraically special, in the sense of the Petrov classification.

Segre characteristic↗

NASA NTRS1966

Relativistic interaction energies between atoms in degenerate states.

Relativistic interaction energies between atoms in degenerate states determined, using Breit-Pauli approximation

QUANTUM MECHANICS↗

NASA NTRS1967

Unstable magnetosonic waves in a relativistic plasma.

Magnetosonic wave effect on anisotropic relativistic plasma component, obtaining cosmic ray plasma instability when wave frequencies are less than electron cyclotron frequency

ANISOTROPY↗

NASA NTRS1967

Interaction of relativistic particles with magnetic fields.

Energy dissipation by relativistic charged particle and magnetic field containing it shown to exceed initial energy

MAGNETIC FIELD↗

NASA NTRS2019

The Event Horizon General Relativistic Magnetohydrodynamic Code Comparison Project

Recent developments in compact object astrophysics, especially the discovery of merging neutron stars by LIGO, the imaging of the black hole in M87 by the Event Horizon Telescope, and high- precision astrometry of the Galactic Center at close to the event horizon scale by the GRAVITY experiment motivate the development of numerical source models that solve the equations of general relativistic magnetohydrodynamics (GRMHD). Here we compare GRMHD solutions for the evolution of a magnetized accretion flow where turbulence is promoted by the magnetorotational instability from a set of nine GRMHD codes: Athena++, BHAC, Cosmos++, ECHO, H-AMR, iharm3D, HARM-Noble, IllinoisGRMHD, and KORAL. Agreement among the codes improves as resolution increases, as measured by a consistently applied, specially developed set of code performance metrics. We conclude that the community of GRMHD codes is mature, capable, and consistent on these test problems.

relativistic processes↗

NASA NTRS1963