Results 41 to 50 of about 1,966 (233)

Observations of the Chromospheric Evershed Flow of Sunspot Penumbra with the Application of the Self-organizing Map Technique

The Astrophysical Journal, 2023
The sunspot penumbra is usually observed in the photosphere and it is of particular interest for its magnetoconvection, which seems to transport the heat from the top of the convection zone into the solar atmosphere.
P. Romano, F. Schilliró, M. Falco
doaj   +1 more source

ORFEES – a radio spectrograph for the study of solar radio bursts and space weather applications

Journal of Space Weather and Space Climate, 2021
Radio bursts are sensitive tracers of non-thermal electron populations in the solar corona. They are produced by electron beams and shock waves propagating through the corona and the heliosphere, and by trapped electron populations in coronal mass ...
Hamini Abdallah, Auxepaules Gabriel, Birée Lionel, Kenfack Guy, Kerdraon Alain, Klein Karl-Ludwig, Lespagnol Patrice, Masson Sophie, Coutouly Lucile, Fabrice Christian, Romagnan Renaud   +10 more
doaj   +1 more source

Models of the Solar Photosphere [PDF]

Symposium - International Astronomical Union, 1990
This review summarizes the main properties of the available theoretical models of the solar photosphere and the semiempirical models based primarily on observed spectra in different wavelength regions. LTE and non-LTE semiempirical models are compared with LTE and non-LTE theoretical (radiative equilibrium) models calculated with and without convective
openaire   +1 more source

The First Light From the Joint Total Solar Irradiance Measurement Experiment Onboard the FY‐3E Meteorological Satellite

Earth and Space Science, Volume 12, Issue 10, October 2025.
Abstract The Joint Total Solar Irradiance Monitor (JTSIM) onboard the Fengyun‐3E meteorological satellite has been launched successfully on 4th of July 2021. It aims at measuring the Total Solar Irradiance (TSI) from the Low Earth Orbit. The instruments on the Fengyun‐3E/JTSIM include the Digital Absolute Radiometer (DARA) from the Physikalisch ...
Ping Zhu, Xin Ye, Jean‐Philippe Montillet, Wolfgang Finsterle, Dongjun Yang, Duo Wu, Jin Qi, Wei Fang, Huizeng Liu, Xiuqing Hu, Peng Zhang   +10 more
wiley   +1 more source

Transient rotation of photospheric vector magnetic fields associated with a solar flare

Nature Communications, 2018
The violent solar eruptions known as flares are caused by magnetic reconnection. Here, the authors identify a sudden 12°–20° counter clockwise rotation of vector magnetic fields in photosphere, associated with the emissions of moving flare ribbons.
Yan Xu, Wenda Cao, Kwangsu Ahn, Ju Jing, Chang Liu, Jongchul Chae, Nengyi Huang, Na Deng, Dale E. Gary, Haimin Wang   +9 more
doaj   +1 more source

A Statistical Analysis of Magnetic Field Changes in the Photosphere during Solar Flares Using High-cadence Vector Magnetograms and Their Association with Flare Ribbons [PDF]

, 2023
Rahul Yadav, Maria D. Kazachenko
openalex   +1 more source

Elastic Properties of Returned Samples From Asteroid (162173) Ryugu

Journal of Geophysical Research: Planets, Volume 130, Issue 10, October 2025.
Abstract The successful sample return from asteroid (162173) Ryugu by Hayabusa2 has contributed to our understanding of the solar system evolution. Over the course of the initial sample analysis, various measurements were conducted, such as mineralogical observation, chemical analysis, and mechanical property measurement.
Keisuke Onodera, Yuta Ino, Satoshi Tanaka, Taichi Kawamura, Takuya Ishizaki, Rei Kanemaru, Ryota Fukai, Takeshi Tsuji, Tomoki Nakamura, Daisuke Nakashima, Masayuki Uesugi, Shogo Tachibana, Seiji Sugita, Hisayoshi Yurimoto, Takaaki Noguchi, Ryuji Okazaki, Hikaru Yabuta, Hiroshi Naraoka, Kanako Sakamoto, Toru Yada, Masahiro Nishimura, Aiko Nakato, Akiko Miyazaki, Kasumi Yogata, Masanao Abe, Tatsuaki Okada, Tomohiro Usui, Makoto Yoshikawa, Takanao Saiki, Fuyuto Terui, Satoru Nakazawa, Sei‐ichiro Watanabe, Yuichi Tsuda   +32 more
wiley   +1 more source

Deconstructing Photospheric Spectral Lines in Solar and Stellar Flares

The Astrophysical Journal
During solar flares, spectral lines formed in the photosphere have been shown to exhibit changes to their profiles despite the challenges of energy transfer to these depths.
Aaron J. Monson, Mihalis Mathioudakis, Adam F. Kowalski   +2 more
doaj   +1 more source

Using Solar Wind Data Assimilation Results to Drive Dynamic Solar Wind Models

Space Weather, Volume 23, Issue 9, September 2025.
Abstract A coupled modeling framework is often used to forecast the near‐Earth solar wind conditions. This consists of a coronal model for close to the Sun and a heliospheric model for propagating the solar wind out to Earth. The coronal model is initialized using photospheric magnetic field observations and beyond this, there are no further ...
Harriet Turner, Mathew Owens, Luke Barnard, Matthew Lang, Edmund Henley, François‐Xavier Bocquet, Siegfried Gonzi, C. Nick Arge, Rhiannon Biddiscombe, Tinatin Baratashvili   +9 more
wiley   +1 more source

The Striated Solar Photosphere Observed at Resolution

The Astrophysical Journal Letters
Striated granular edges observed in the solar photosphere represent one of the smallest-scale phenomena on the Sun. They arise from the interaction of strongly coupled hydrodynamic, magnetic, and radiative properties of the plasma.
David Kuridze, Friedrich Wöger, Han Uitenbroek, Matthias Rempel, Alexandra Tritschler, Thomas Rimmele, Catherine Fischer, Oskar Steiner   +7 more
doaj   +1 more source