Results 101 to 110 of about 78,626 (296)

Relativistic Astrophysical Plasmas

Kakuyūgō kenkyū, 1989
Selected theoretical topics in high energy astrophysics are discussed. Firstly an account is given of accretion disks around a massive black hole and radiation processes in hot thermal plasmas. Then recent studies on the effects of electron-positron pairs in relativistic thermal plasmas are summarized.
openaire   +2 more sources

Accurate and Robust Sensing of the Ionosphere With Uncoded Long Pulse ISR Measurements: 2. Differential Drift Inversions Using Lag Profile Phase Data

Radio Science, Volume 61, Issue 1, January 2026.
Abstract A method of estimating heavy (O+) and light (H+ and He+) ion drift velocities in the topside F‐region ionosphere using Arecibo uncoded long pulse data is presented. We show that multi‐ion drift velocity estimation using long pulse ACF phase data requires accurate knowledge of ionospheric state parameters, such as temperatures and compositions,
Binghui Wang, Erhan Kudeki, Yulun Wu
wiley   +1 more source

A Self-consistent Model of Shock-heated Plasma in Nonequilibrium States for Direct Parameter Constraints from X-Ray Observations

The Astrophysical Journal
X-ray observations of shock-heated plasmas, such as those found in supernova remnants (SNRs), often exhibit features of temperature and ionization nonequilibrium. For accurate interpretation of these observations, proper calculations of the equilibration
Yuken Ohshiro, Shunsuke Suzuki, Yoshizumi Okada, Hiromasa Suzuki, Hiroya Yamaguchi   +4 more
doaj   +1 more source

Deep Learning‐Based Prediction of High‐Speed Solar Wind Streams: Spatio‐Temporal Dependencies in Coronal Hole Dynamics

Earth and Space Science, Volume 13, Issue 1, January 2026.
Abstract High‐speed solar wind streams (HSS), originating from coronal holes (CH), are key drivers of space weather disturbances and heliospheric dynamics. However, forecasting HSS remains challenging due to the evolving morphology of CH. In this study, we present a deep learning‐based framework that models the spatiotemporal relationship between CH ...
J. J. Abraham‐Alowonle, Amr Hamada, Moataz Abdelwahab, Kanya Kusano, Ayman Mahrous   +4 more
wiley   +1 more source

Frozen-field Modeling of Coronal Condensations with MPI-AMRVAC. I. Demonstration in Two-dimensional Models

The Astrophysical Journal
Large-scale coronal plasma evolutions can be adequately described by magnetohydrodynamics (MHD) equations. However, full multidimensional MHD simulations require substantial computational resources.
Yuhao Zhou, Xiaohong Li, Rony Keppens
doaj   +1 more source

Coronal Loop Seismology Using Standing Kink Oscillations With a Lookup Table

Frontiers in Astronomy and Space Sciences, 2019
The transverse structure of coronal loops plays a key role in the physics but the small transverse scales can be difficult to observe directly. For wider loops the density profile may be estimated by forward modeling of the transverse intensity profile ...
David J. Pascoe, Alan W. Hood, Tom Van Doorsselaere   +2 more
doaj   +1 more source

“Boiling the vacuum”: in silico plasmas under extreme conditions in the laboratory and in astrophysics [PDF]

, 2017
L. O. Silva
openalex   +1 more source

The Age and Composition of the Voyager Seamounts: Evidence for a Long‐Lived Marquesas Mantle Source

Geochemistry, Geophysics, Geosystems, Volume 27, Issue 1, January 2026.
Abstract We present new observations on the dynamics and locations of deep mantle reservoirs derived from the ages and compositions of Voyager Seamount Chain lava flows. The previously unexplored Voyager Seamount Chain trends NW–SE between the Mid‐Pacific Mountains and the Northwestern Hawaiian Ridge.
Andrea Balbas, Hannah Paradis, Kevin Konrad, Valerie A. Finlayson, Michael Bizimis, Stephanie Anderson, Christopher Kelley, Nicole A. Raineault, Beth N. Orcutt   +8 more
wiley   +1 more source

Synchrotron Radiation Maps from Relativistic MHD Jet Simulations

Galaxies, 2017
Relativistic jets from active galactic nuclei (AGN) often display a non-uniform structure and are, under certain conditions, susceptible to a number of instabilities.
Dimitrios Millas, Oliver Porth, Rony Keppens   +2 more
doaj   +1 more source

Research Opportunities in Plasma Astrophysics [PDF]

, 2022
S. D. Bale, A. Bhattacharjee, F. Cattaneo, Jemes Drake, Hantao Ji, Marty Lee, Hui Li, Edison Liang, Marc W. Pound, S. C. Prager, Eliot Quataert, B. A. Remington, R. Rosner, D. D. Ryutov, Edward Thomas, Ellen G. Zweibel   +15 more
openalex   +1 more source