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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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Rigid motions in Einstein spaces.

General relativistic dyadic formalism applied to metrics of rigid bodies moving in Einstein space of uniform space-time curvature

SPACE-TIME METRIC↗

An Exact Solution of Einstein-Maxwell Gravity Coupled to a Scalar Field

The general solution to low-energy string theory representing static spherically symmetric solution of the Einstein-Maxwell gravity with a massless scalar field has been found. Some of the partial cases appear to coincide with known solutions to black holes, naked singularities, and gravity and electromagnetic fields.

Einstein-Maxwell gravity scalar field↗

Interstellar Scattering and the Einstein Ring PKS 1830-211

High frequency (22 GHz) data have been used two resolve two compact components of the strong gravitational lens PKS 1830-211. The two bright components are at opposite sides of a one arcsecond diameter Einstein ring.

gravitational lens Einstein ring interstellar scat↗

Soliton resonance in bose-einstein condensate

A new phenomenon in nonlinear dispersive systems, including a Bose-Einstein Condensate (BEC), has been described. It is based upon a resonance between an externally induced soliton and 'eigen-solitons' of the homogeneous cubic Schrodinger equation. There have been shown that a moving source of positive /negative potential induces bright /dark solitons in an attractive / repulsive Bose condensate.

Bose-Einstein Condensate BEC nonlinear dispersive ↗