Results 101 to 110 of about 6,222 (212)

Observations and Simulations of Formation of Broad Plasma Depletions Through Merging Process [PDF]

Broad plasma depletions in the equatorial ionosphere near dawn are region in which the plasma density is reduced by 1-3 orders of magnitude over thousands of kilometers in longitude.
Ballenthin, J. O., Beaujardiere, O. De La, Huang, Chao-Song, Hunton, D.E., Pfaff, Robert F., Retterer, J. M., Roddy, P. A.   +6 more
core   +1 more source

Pulsar-driven Jets in Supernovae, Gamma-Ray Bursts, and the Universe

, 2012
The bipolarity of Supernova 1987A can be understood through its very early light curve observed from the CTIO 0.4-m telescope and IUE FES, and following speckle observations of the `Mystery Spot' by two groups.
Middleditch, John
core   +2 more sources

Enhancing Low‐Latitude Ionospheric Irregularity Prediction With Generalized Linear Models

Space Weather, Volume 24, Issue 3, March 2026.
Abstract The ionosphere poses challenges for accurate forecasting due to its complexity and variability. Irregularities in the lower ionosphere are influenced by local time, season, geographic location, solar activity and space weather, complicating precise predictions.
Alysson Brhian, Marco A. Ridenti, Francisco Azpilicueta, Mauricio Gende, Marisa Roberto   +4 more
wiley   +1 more source

A review on the numerical simulation of equatorial plasma bubbles toward scintillation evaluation and forecasting

Progress in Earth and Planetary Science, 2017
Equatorial plasma bubbles (EPBs) have been a longstanding and increasingly important subject because they cause severe scintillations in radio waves from Global Navigation Satellite System satellites.
Tatsuhiro Yokoyama
doaj   +1 more source

A research in support of NASA's space science [PDF]

Thirty-nine papers on cosmic ray anisotropies, law energy auroral particles, helium and hydrogen airglow, ionospheric irregularities, thermospheric winds, interhemisphere ion transport, ion cyclotron heating, ion temperature morphology, ion chemistry ...
Hanson, W. B.
core   +1 more source

Studies in upper and lower atmosphere coupling [PDF]

The theoretical and data-analytic work on upper and lower atmosphere coupling performed under a NASA Headquarters contract during the period April 1978 to March 1979 are summarized.
Chiu, Y. T., Rice, C. J., Sharp, L. R.
core   +1 more source

An X-ray View of Radio Sources

, 2004
We review recent examples where the synergy between radio and X-ray observations has led to substantial progress in understanding astronomical systems.
Schwartz, Daniel A.
core   +2 more sources

Spiral flows in cool-core galaxy clusters

, 2012
We argue that bulk spiral flows are ubiquitous in the cool cores (CCs) of clusters and groups of galaxies. Such flows are gauged by spiral features in the thermal and chemical properties of the intracluster medium, by the multi-phase properties of CCs ...
Ascasibar, Blanton, Blondin, Bulbul, Buote, Bîrzan, Churazov, Clarke, Diehl, Donahue, Forman, Fujita, Guo, Johnson, Keshet, Keshet, Keshet, Lim, Markevitch, Markevitch, Mazzotta, Mazzotta, McDonald, Molendi, O'Dea, Quataert, Rafferty, Randall, Rybicki, Soker, Tanaka, Tittley, Uri Keshet, Vikhlinin, Zakamska, ZuHone, ZuHone   +36 more
core   +1 more source

The Impact of Vertical Plasma Motion on the Evolution of Predawn Equatorial Plasma Bubbles on the Dayside

Geophysical Research Letters
This study investigates the impact of vertical ionospheric drift during daytime on the evolution of predawn equatorial plasma bubbles by conducting model simulations using “Sami3 is Another Model of the Ionosphere.” The upward drift of the ionosphere ...
Hyosub Kil, Joseph D. Huba, Larry J. Paxton   +2 more
doaj   +1 more source

Review of the generation mechanisms of post-midnight irregularities in the equatorial and low-latitude ionosphere

Progress in Earth and Planetary Science, 2018
This paper provides a brief review of ionospheric irregularities that occur in magnetically equatorial and low-latitude regions post-midnight during low solar activity periods. Ionospheric irregularities can occur in equatorial plasma bubbles.
Yuichi Otsuka
doaj   +1 more source