Results 51 to 60 of about 3,957 (226)

Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1

The Astrophysical Journal
We report the first detection of a magnetic discontinuity in the upper solar chromosphere associated with a coronal loop brightening. Our findings are based on novel observations obtained by the Chromospheric LAyer SpectroPolarimeter (CLASP2.1 ...
Donguk Song, Ryohko Ishikawa, David E. McKenzie, Javier Trujillo Bueno, Frédéric Auchère, Ryouhei Kano, Amy Winebarger, Takenori J. Okamoto, Laurel A. Rachmeler, Ken Kobayashi, Genevieve D. Vigil, Adam R. Kobelski, Christian Bethge, Eun-Kyung Lim, Luca Belluzzi, Ernest Alsina Ballester, Tanausú del Pino Alemán, Jiří Štěpán   +17 more
doaj   +1 more source

Intrastriatal Grafting of Chromospheres: Survival and Functional Effects in the 6-OHDA Rat Model of Parkinson's Disease. [PDF]

PLoS ONE, 2016
Cell replacement therapy in Parkinson's disease (PD) aims at re-establishing dopamine neurotransmission in the striatum by grafting dopamine-releasing cells. Chromaffin cell (CC) grafts produce some transitory improvements of functional motor deficits in
Alejandra Boronat-García, Marcela Palomero-Rivero, Magdalena Guerra-Crespo, Diana Millán-Aldaco, René Drucker-Colín   +4 more
doaj   +1 more source

Structure and dynamics of the solar chromosphere [PDF]

, 2002
The thesis "Structure and dynamics of the solar chromosphere" of J.M. Krijger is a study on the behavior of the solar chromosphere, the thin layer just above the solar surface (photosphere) visible in purple red light during a total solar eclipse.
Krijger, Johannes Mattheus
core  

Survival efficacy of chromosphere cell grafts.

, 2016
Survival efficacy of chromosphere cell grafts.
René Drucker-Colín (2950836), Marcela Palomero-Rivero (348126), Magdalena Guerra-Crespo (2950833), Alejandra Boronat-García (2950839), Diana Millán-Aldaco (348127)   +4 more
core   +1 more source

Parker Solar Probe Observations of Proton Core‐Beam Distributions in Heliospheric Current Sheet Region: Quasilinear Instability Analysis Combined With Collisional Relaxation

Journal of Geophysical Research: Space Physics, Volume 131, Issue 4, April 2026.
Abstract Parker Solar Probe has been proven as instrumental for the observation of young solar wind. During the encounters E‐07 and E‐08, PSP recorded the core plus beaming protons crossing the heliospheric current Sheet region. When the observed PSP data is plotted in the temperature ratio versus parallel beta space, it is found that the occurrence ...
M. Rashid, P. H. Yoon, J. Huang, C. Salem, M. Sarfraz, S. Alnussirat, R. A. López, J. Seough, H. Xie, D. Larson, R. Livi   +10 more
wiley   +1 more source

Chromospheric Cannonballs on the Sun

The Astrophysical Journal Letters, 2019
Abstract In the highly dynamic chromosphere, there exist many kinds of small-scale activities, such as spicules, surges, and Ellerman bombs. Here, we report the discovery of a new phenomenon in the chromosphere observed with the New Vacuum Solar Telescope at the Fuxian Solar Observatory.
Shuhong Yang, Jun Zhang, Xiaohong Li, Zhong Liu, Yongyuan Xiang   +4 more
openaire   +2 more sources

Reconstruction of Two‐Dimensional Magnetohydrodynamic and Hall Magnetohydrodynamic Equilibria in Space Using Physics‐Informed Neural Networks

Journal of Geophysical Research: Machine Learning and Computation, Volume 3, Issue 2, April 2026.
Abstract We present a novel data analysis technique based on physics‐informed neural networks (PINNs) to reconstruct two‐dimensional (2D) magnetohydrodynamic (MHD) and Hall MHD equilibria in a space plasma from in situ spacecraft measurements. Our method incorporates the steady‐state MHD or Hall MHD equations—a set of partial differential equations ...
Hiroshi Hasegawa, Eunjin Choi, Kyoung‐Joo Hwang, Kyunghwan Dokgo   +3 more
wiley   +1 more source

Chromospheric Heating from Local Magnetic Growth and Ambipolar Diffusion under Nonequilibrium Conditions

The Astrophysical Journal Letters, 2023
The heating of the chromosphere in internetwork regions remains one of the foremost open questions in solar physics. In the present study, we tackle this old problem by using a very-high-spatial-resolution simulation of quiet-Sun conditions performed ...
Juan Martínez-Sykora, Jaime de la Cruz Rodríguez, Milan Gošić, Alberto Sainz Dalda, Viggo H. Hansteen, Bart De Pontieu   +5 more
doaj   +1 more source

Pulsating chromosphere of classical Cepheids

, 2020
International audienceContext. It has recently been shown that the infrared (IR) emission of Cepheids, constant over the pulsation cycle, might be due to a pulsating shell of ionized gas with a radius of about 15% of that of the star radius, which could ...
Mérand, Antoine, Javanmardi, B., Gallenne, Alexandre, A. Chiavassa, Nardetto, N., Borgniet, S., Mérand, A., V. Hocdé, Lagadec, E., Hocdé, Vincent, Lagadec, Éric, Kervella, P., Hocdé, V., Chiavassa, Andrea, Evans, N., Nardetto, Nicolas, A. Mérand, Kervella, Pierre, P. Kervella, A. Gallenne, Breuval, L., E. Lagadec, D. Gillet, L. Breuval, N. Evans, Gillet, D., N. Nardetto, Ph. Mathias, Chiavassa, A., Mathias, Ph., B. Javanmardi, S. Borgniet, Gallenne, A.   +32 more
core   +1 more source

Reconstructing Historical Solar Indices for Predicting Past Space Weather Events

Space Weather, Volume 24, Issue 4, April 2026.
Abstract Modeling and forecasting the near‐Earth space environment, specifically the thermosphere, is particularly important because it affects the motion of low‐Earth orbit objects through atmospheric drag. Solar indices such as F10.7, S10.7, M10.7, and Y10.7 are commonly used as inputs to ionospheric and thermospheric density models.
Poshan Belbase, Denny M. Oliveira, Theodosios Chatzistergos, Gangkai Poh, Eftyhia Zesta   +4 more
wiley   +1 more source