2016年10月24日 · The analytic model accounts for the two distinct flavors of crescent-shaped electron distributions observed by spacecraft in a thin boundary layer along the low-density separatrix.

2016年10月24日 · here we provide a gen-eral derivation which accounts for the occurrence of both the perpendicular and parallel crescents. Only high-density (magneto. heath) particles with sufficient energy can cross the diffusion region to the low-density (magne-tosphe.

2006年8月14日 · The dramatic crescent captured by NASA's Cassini spacecraft demonstrates how the ringed planet is much wider at the equator than at the poles. Saturn's low density and fast rotation combine to give it its characteristic oblate shape.

2017年2月18日 · In this paper, we reexamine the origin of the crescent-shaped distributions in the light of our new finding that ions and electrons are drifting in opposite directions when displayed in magnetopause boundary-normal coordinates. Therefore, E × B …

2016年7月19日 · The analytic model accounts for the two distinct flavors of crescent-shaped electron distributions observed by spacecraft in a thin boundary layer along the low-density separatrix during asymmetric reconnection.

2016年5月12日 · Electron distribution functions were found to contain characteristic crescent-shaped features in velocity space as evidence for the demagnetization and acceleration of electrons by an intense electric field near the reconnection X-line.

We use three-dimensional particle-in-cell simulations to compute the velocity distribution function of electrons in different areas of the plasma jet and at different phases of the interaction with the discontinuity.

2020年1月9日 · The finite gyroradius effect of the outflow electrons generates the crescent-shaped agyrotropic electron distributions, which drive the EBWs. The EBWs propagate toward the central EDR.

crescent-shaped electron velocity d istribution functions at the edges of a high-speed plasma jet impacting on a thin, steep and impenetrable tangential discontinuity with no magnetic shear. We use three -dimensional particle -in-cell simulations to

1999年5月15日 · This picture of a crescent-shaped Earth and Moon -- the first of its kind ever taken by a spacecraft -- was recorded Sept. 18, 1977, by NASA's Voyager 1 when it was 7.25 million miles (11.66 million kilometers) from Earth.