virial theorem is important for understanding stellar structures. it produces an interesting connection between magnetic and gravitational energies. using the general form of the virial theorem including the magnetic field (toroidal magnetic field), we may explain the solar dynamo model in relation to variations of the magnetic and gravitational energies. we emphasize the role of the gravitatio...

The light from a source at distance d will arrive detectors separated by 100 AU times that differ as much 120 (d/100 Mpc)^{-1} nanoseconds because of the curvature wavefront. At gigahertz frequencies, arrival time difference can be determined to better than nanosecond with interferometry. If space-time positions are known few centimeters, comparable accuracy which very long baseline interferome...

We challenge a widely accepted assumption of observational cosmology: that successful reconstruction of observed galaxy density fields from measured galaxy velocity fields (or vice versa), using the methods of gravitational instability theory, implies that the observed large-scale structures and large-scale flows were produced by the action of gravity. This assumption is false, in that there ex...

ABSTRACT The advent of data sets stars in the Milky Way with 6D phase-space information makes it possible to construct empirically distribution function (DF). Here, we show that accelerations can be uniquely determined from DF using collisionless Boltzmann equation, providing Hessian determinant respect velocities is non-vanishing. We illustrate this procedure and requirement some analytic exam...

Introduction It is well known that shaking can drive size sorting and segregation in granular media ( [1] and references therein). We consider the hypothesis that seismic shaking on asteroids could promote the size sorting of its constituent particles [2]. Such sorting is evident in the images sent by the Hayabusa mission of the surface of the asteroid Itokawa [3]. The simplest example of this ...

Virial theorem is important for understanding stellar structures. It produces an interesting connection between magnetic and gravitational energies. Using the general form of the virial theorem including the magnetic field (toroidal magnetic field), we may explain the solar dynamo model in relation to variations of the magnetic and gravitational energies. We emphasize the role of the gravitatio...

In this paper we explore the possibility of suitably combining the nodes Ω of the existing geodetic LAGEOS, LAGEOS II and Ajisai SLR satellites and of the radar altimeter Jason–1 satellite in order to increase the accuracy in testing the general relativistic gravitomagnetic Lense–Thirring secular effect in the gravitational field of the Earth. The proposal of introducing Ajisai and Jason–1 in s...