Results 111 to 120 of about 15,079 (225)

Ellerman bombs and UV bursts: transient events in chromospheric current sheets

, 2019
Ellerman bombs (EBs) and UV bursts are both brightenings related to flux emergence regions and specifically to magnetic flux of opposite polarity that meet in the photosphere.
Archontis, V., Bjørgen, J. P., Carlsson, M., Hansteen, V., Ortiz, A., Pereira, T. M. D.   +5 more
core   +1 more source

Non-WKB Models of the FIP Effect: The Role of Slow Mode Waves

, 2011
A model for element abundance fractionation between the solar chromosphere and corona is further developed. The ponderomotive force due to Alfven waves propagating through, or reflecting from the chromosphere in solar conditions generally accelerates ...
Allan, Avrett, Banaszkiewicz, Brooks, Bryans, Campos, Carlsson, Cranmer, Cranmer, Cranmer, Feldman, Feldman, Feldman, Ferland, Giammanco, Giammanco, J. Martin Laming, Kasper, Khomenko, Ko, Laming, Laming, Laming, Laming, Landau, Litwin, Patsourakos, Phillips, Schwadron, Sylwester, Sylwester, Widing, Wood   +32 more
core   +1 more source

A single frequency approach to nonequilibrium modeling of the chromosphere

Astronomy & Astrophysics
Context. The solar chromosphere is a region where radiation plays a critical role in energy transfer and interacts strongly with the plasma. In this layer, strong spectral lines, such as the Lyman lines, contribute significantly to radiative energy ...
Ruan W., Przybylski D., Cameron R., Solanki S. K.   +3 more
doaj   +1 more source

Structure of sunspot light bridges in the chromosphere and transition region

, 2017
Light bridges (LBs) are elongated structures with enhanced intensity embedded in sunspot umbra and pores. We studied the properties of a sample of 60 LBs observed with the Interface Region Imaging Spectrograph (IRIS). Using IRIS near- and far-ultraviolet
Rezaei, Reza
core   +1 more source

Effect of Magnetic Diffusion in the Chromosphere on the Solar Wind

The Astrophysical Journal
We investigate nonideal magnetohydrodynamical (MHD) effects in the chromosphere on the solar wind by performing MHD simulations for Alfvén-wave-driven winds, explicitly including ohmic and ambipolar diffusion.
Masato Matsuoka, Takeru K. Suzuki, Takato Tokuno, Kensuke Kakiuchi   +3 more
doaj   +1 more source

Wave propagation and shock formation in different magnetic structures

, 2008
Velocity oscillations "measured" simultaneously at the photosphere and the chromosphere -from time series of spectropolarimetric data in the 10830 A region- of different solar magnetic features allow us to study the properties of wave propagation as a ...
Avrett, Ballesteros, Bard, Brynildsen, Bünte, Centeno, Centeno, Centeno, Centeno, Collados, Collados, Collados, De Pontieu, De Pontieu, Fleck, J. Trujillo Bueno, Jefferies, Khomenko, Khomenko, Kneer, Lites, M. Collados, Martínez Pillet, Mihalas, R. Centeno, Ruiz Cobo, Schmidt, Schmidt, Socas-Navarro, Socas-Navarro, Souffrin, Thomas, Trujillo Bueno, Zhugzhda   +33 more
core   +1 more source

Numerical Experiment on the Influence of Granulation-induced Waves on Solar Chromosphere Heating and Plasma Outflows in a Magnetic Arcade

The Astrophysical Journal
This paper offers a fresh perspective on solar chromosphere heating and plasma outflows, focusing on the contribution of waves generated by solar granulation.
M. Kumar, K. Murawski, B. Kuźma, E. K. J. Kilpua, S. Poedts, R. Erdélyi   +5 more
doaj   +1 more source

High frequency and high wavenumber solar oscillations

, 1999
We determine the frequencies of solar oscillations covering a wide range of degree (100< l
Ando H., Antia H. M., Antia H. M., H. M. Antia, Kneer F., Murawski K., Richard O., Sarbani Basu   +7 more
core   +1 more source

Magnetic Fields beneath Active Region Coronal Loops

The Astrophysical Journal
We examine the hypothesis that multipolar magnetic fields advected by photospheric granules can contribute to heating the active chromosphere and corona.
Philip G. Judge, L. Kleint, C. Kuckein
doaj   +1 more source

87th Annual Meeting of the Meteoritical Society 2025: Abstracts

Meteoritics &Planetary Science, Volume 60, Issue S1, Page 30-350, August 2025.
wiley   +1 more source