Results 81 to 90 of about 285 (167)

Tonalli: A Simplified 3D Multispecies Magnetohydrodynamic Model Using a Non-LTE Approximation for the Solar Chromosphere

The Astrophysical Journal
In this work, we present the development of the Tonalli code: a simplified multispecies (H I , H II , H ^− , and e ) magnetohydrodynamic (MHD) model in non–local thermodynamic equilibrium (NLTE) focused on solar chromospheric conditions.
Elizandro Huipe-Domratcheva, Victor De la Luz, Luis A. Zapata, J. J. González-Avilés, Arian Ojeda-González   +4 more
doaj   +1 more source

The Effect of Plasma-β on the Heating Mechanisms during Magnetic Reconnection in Partially Ionized Low Solar Atmosphere

The Astrophysical Journal
We performed numerical simulations of magnetic reconnection with different strengths of magnetic fields from the solar photosphere to the upper chromosphere.
Abdullah Zafar, Lei Ni, Kaifeng Kang, Guanchong Cheng, Jing Ye, Jun Lin, Ahmad Ali, Nadia Imtiaz   +7 more
doaj   +1 more source

Statistical Patterns in the Time Evolution of Interface Region Imaging Spectrograph Bright Points

The Astrophysical Journal
Interface Region Imaging Spectrograph bright points (IBPs) are ubiquitous, small-scale energetic events with a multithermal nature, typically observed in the chromosphere or transition region and closely linked to photospheric structure and coronal ...
Llŷr Dafydd Humphries, Huw Morgan, David Kuridze   +2 more
doaj   +1 more source

Characterization of white-light enhancements under umbral conditions in one-dimensional simulations of solar flares

Astronomy & Astrophysics
Context. Solar flares with signatures in the optical continuum (white light, WL) pose a challenge not only to the standard flare model, but also to solar flare simulations. In particular, simulations are so far not able to convincingly reproduce observed
Ornig S., Carlsson M.
doaj   +1 more source

High-resolution Imaging Spectroscopy of a Tiny Sigmoidal Minifilament Eruption

The Astrophysical Journal
Minifilament eruptions producing small jets and microflares have mostly been studied based on coronal observations at extreme-ultraviolet and X-ray wavelengths. This study presents chromospheric plasma diagnostics of a quiet-Sun minifilament of size ∼ 2″
Jiasheng Wang, Jeongwoo Lee, Jongchul Chae, Wenda Cao, Haimin Wang   +4 more
doaj   +1 more source

Large-amplitude transverse MHD waves prevailing in the Hα chromosphere of a solar quiet region revealed by MiHI integrated field spectral observations

Astronomy & Astrophysics
The investigation of plasma motions in the solar chromosphere is crucial for understanding the transport of mechanical energy from the interior of the Sun to the outer atmosphere and into interplanetary space. We report the finding of large-amplitude oscillatory transverse motions prevailing in the non-spicular Hα chromosphere of a small quiet region ...
Jongchul Chae, Michiel van Noort, Maria S. Madjarska, Kyeore Lee, Juhyung Kang, Kyuhyoun Cho   +5 more
openaire   +3 more sources

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

Machine Learning–based Separation of the He I 10830 Å Chromospheric Signal: Quantitative Analysis of Chromosphere–Corona Intensity in the Quiet Sun

The Astrophysical Journal Supplement Series
The He I 10830 Å line, a crucial optically thin chromospheric line, is frequently used to study coronal heating and vertical coupling across the chromosphere–corona interface.
Huaiming Li, Fangyu Xu, Yi Bi, Zhenyu Jin   +3 more
doaj   +1 more source

The role and contribution of magnetic fields, characterized via their magnetic flux, to the statistical structuring of the solar atmosphere. [PDF]

Sci Rep, 2022
Li KJ, Xu JC, Feng W.
europepmc   +1 more source

High-resolution Observation of Minifilament Eruptions near a Coronal Hole Boundary and Their Response in the Solar Corona

The Astrophysical Journal
We investigated minifilament (MF) eruptions (MFEs) near coronal hole (CH) boundaries to explore their role in coronal dynamics and their potential contributions to the solar wind.
Nengyi Huang, Haimin Wang
doaj   +1 more source