Results 21 to 30 of about 1,535,639 (228)

Synchrotron Firehose Instability

The Astrophysical Journal, 2023
We demonstrate using linear theory and particle-in-cell (PIC) simulations that a synchrotron-cooling collisionless plasma acquires pressure anisotropy and, if the plasma beta is sufficiently high, becomes unstable to the firehose instability, in a ...
Vladimir Zhdankin, Matthew W. Kunz, Dmitri A. Uzdensky   +2 more
doaj   +1 more source

Modelling the total solar eclipse in 2024 with COCONUT

Astronomy & Astrophysics
Context. Coronal modelling is crucial for a better understanding of solar physics and heliophysics. Accurate plasma conditions at the outer boundary of a solar corona lead to more precise space weather predictions.
Baratashvili T., Wang H. P., Sorokina D., Lani A., Poedts S.   +4 more
doaj   +1 more source

High-Frequency Dynamics of Active Region Moss as Observed by IRIS

Frontiers in Astronomy and Space Sciences, 2019
The high temporal, spatial and spectral resolution of Interface Region Imaging Spectrograph (IRIS) has provided new insights into the understanding of different small-scale processes occurring at the chromospheric and transition region (TR) heights.
Nancy Narang, Vaibhav Pant, Dipankar Banerjee, Tom Van Doorsselaere   +3 more
doaj   +1 more source

Thermal instability in coronal loops: Linking eigenvalue spectra to time-dependent evolution

Astronomy & Astrophysics
Context. Cool, dense condensations such as coronal rain and prominences suggest that coronal plasma can undergo runaway radiative cooling. Connecting this behaviour to linear thermal modes requires a fuller understanding of the deeper connection between ...
Kelly Adrian, Keppens Rony, De Jonghe Jordi   +2 more
doaj   +1 more source

Design considerations for the use of laser-plasma accelerators for advanced space radiation studies [PDF]

, 2012
We present design considerations for the use of laser-plasma accelerators for mimicking space radiation and testing space-grade electronics. This novel application takes advantage of the inherent ability of laser-plasma accelerators to produce particle ...
Pretzler G, Rosenzweig JB, Koenigstein, T., Hidding, B., Karger, O., Pretzler, G., Konigstein T, Rosenzweig, J. B., Hidding B, Karger O   +9 more
core   +2 more sources

Impact of heat flux and suprathermal electrons on steady-state solar wind modelling with Icarus

Astronomy & Astrophysics
Context. Suprathermal electrons significantly contribute to the heat flux in the solar wind (SW), making their treatment essential for improved SW modelling.
Vinogradov A., Lazar M., Poedts S., Fichtner H., Baratashvili T., Dakeyo J.-B., Scherer K., Wijsen N.   +7 more
doaj   +1 more source

The Bochum Survey of the Southern Galactic Disk: IV. Multi‐Band Photometry

Astronomische Nachrichten, EarlyView.
ABSTRACT The Southern Galactic Disk Survey (GDS) monitored a mosaic of 268 fields along a 6°‐wide stripe in the southern galactic disk from September 2010 to September 2019. These fields were observed between 21 and 407 times sim r′$$ {r}^{\prime } $$ultaneously in (8mag≲r′≲18mag$$ 8\kern0.6em \mathrm{mag}\lesssim {r}^{\prime}\lesssim 18\kern0.6em ...
Julia Blex, Dominik J. Bomans, Kerstin Weis, Markus Demleitner, Moritz Hackstein, Anna Franckowiak, Michael Ramolla, Christian Westhues, Christofer Fein, Rolf Chini   +9 more
wiley   +1 more source

Astronomy & Astrophysics (CAUCASUS)-VOLUME 2

, 2020
The second volume of the international scientific journal Astronomy & Astrophysics (Caucasus) contains the scientific works delivered as scientific reports by their authors at International Scientific Conference Modern Problems of Astrophysics – II ...
(CAUCASUS), Astronomy & Astrophysics
core   +1 more source

Amplitudes and Energy Fluxes of Simulated Decayless Kink Oscillations

Frontiers in Astronomy and Space Sciences, 2019
Recent observations with the Atmospheric Imaging Assembly (AIA) instrument on the SDO spacecraft have revealed the existence of decayless coronal kink oscillations.
Konstantinos Karampelas, Tom Van Doorsselaere, David J. Pascoe, Mingzhe Guo, Mingzhe Guo, Patrick Antolin   +5 more
doaj   +1 more source

Temperature‐Dependent Kinetics of Plasma‐Based CO2 Conversion: Interplay of Electron‐Driven and Thermal‐Driven Chemistry

ChemSusChem, Volume 18, Issue 6, March 15, 2025.
The transformation of CO2 into chemical building blocks is essential for a net‐zero energy future. Plasma‐chemical processing offers promising potential to achieve this. Here, we explore a temperature‐dependent plasma‐chemical reaction mechanism, revealing a shift from electron‐driven to thermal‐driven CO2 conversion regimes.
Aswath Mohanan, Ramses Snoeckx, Min Suk Cha   +2 more
wiley   +1 more source