Zobrazeno 1 - 10
of 223
pro vyhledávání: '"Fleishman, Gregory D."'
Autor:
Alissandrakis, Costas E., Fleishman, Gregory D., Fedenev, Viktor V., White, Stephen M., Altyntsev, Alexander T.
We report for the first time the detection of thermal free-free emission from post-flare loops at 34GHz in images from the Nobeyama Radioheliograph (NoRH). We studied 8 loops, 7 of which were from regions with extremely strong coronal magnetic field
Externí odkaz:
http://arxiv.org/abs/2406.14638
Autor:
White, Stephen M., Shimojo, Masumi, Iwai, Kazumasa, Bastian, Timothy S., Fleishman, Gregory D., Gary, Dale E., Magdalenic, Jasmina, Vourlidas, Angelos
Publikováno v:
Astrophysical Journal, 2024
This paper investigates the incidence of coherent emission in solar radio bursts, using a revised catalog of 3800 solar radio bursts observed by the Nobeyama Radio Polarimeters from 1988 to 2023. We focus on the 1.0 and 2.0 GHz data, where radio flux
Externí odkaz:
http://arxiv.org/abs/2405.01755
Autor:
Kurt, Victoria G., Veronig, Astrid M., Fleishman, Gregory D., Hinterreiter, Jürgen, Tschernitz, Johannes, Lysenko, Alexandra L.
Publikováno v:
A&A 686, A195 (2024)
The 2003 October 28 (X17.2) eruptive flare was a unique event. The coronal electric field and the {\pi}-decay {\gamma}-ray emission flux had the highest values ever inferred in solar flares. This study reveals physical links between the magnetic reco
Externí odkaz:
http://arxiv.org/abs/2403.08135
Autor:
Lysenko, Alexandra L., White, Stephen M., Zhdanov, Dmitry A., Meshalkina, Nataliia S., Altyntsev, Aleksander T., Motorina, Galina G., Fleishman, Gregory D.
Publikováno v:
The Astrophysical Journal, 2023, Volume 954, Issue 2, id.122, 12 pp
We identify a set of ~100 "cold" solar flares and perform a statistical analysis of them in the microwave range. Cold flares are characterized by a weak thermal response relative to nonthermal emission. This work is a follow up of a previous statisti
Externí odkaz:
http://arxiv.org/abs/2309.03993
Solar flares are driven by release of the free magnetic energy and its conversion to other forms of energy -- kinetic, thermal, and nonthermal. Quantification of partitions between these energy components and their evolution is needed to understand t
Externí odkaz:
http://arxiv.org/abs/2308.00149
Autor:
Chen, Bin, Gary, Dale E., Yu, Sijie, Mondal, Surajit, Fleishman, Gregory D., Li, Xiaocan, Shen, Chengcai, Guo, Fan, White, Stephen M., Bastian, Timothy S., Saint-Hilaire, Pascal, Drake, James F., Dahlin, Joel, Glesener, Lindsay, Ji, Hantao, Veronig, Astrid, Oka, Mitsuo, Reeves, Katharine K., Karpen, Judith
Solar flares and the often associated solar eruptive events serve as an outstanding laboratory to study the magnetic reconnection and the associated energy release and conversion processes under plasma conditions difficult to reproduce in the laborat
Externí odkaz:
http://arxiv.org/abs/2301.12192
Autor:
Chen, Bin, Bastian, Timothy S., Gibson, Sarah, Fan, Yuhong, White, Stephen M., Gary, Dale E., Vourlidas, Angelos, Yu, Sijie, Mondal, Surajit, Fleishman, Gregory D., Saint-Hilaire, Pascal
Coronal mass ejections (CMEs) are the most important drivers of space weather. Central to most CMEs is thought to be the eruption of a bundle of highly twisted magnetic field lines known as magnetic flux ropes. A comprehensive understanding of CMEs a
Externí odkaz:
http://arxiv.org/abs/2301.12188
Autor:
Chen, Bin, Kooi, Jason E., Wexler, David B., Gary, Dale E., Yu, Sijie, Mondal, Surajit, Kobelski, Adam R., Seaton, Daniel B., West, Matthew J., White, Stephen M., Fleishman, Gregory D., Saint-Hilaire, Pascal, Zhang, Peijin, Gilly, Chris R., Mason, James P., Reid, Hamish
The "middle corona," defined by West et al. (2022) as the region between ~1.5-6 solar radii, is a critical transition region that connects the highly structured lower corona to the outer corona where the magnetic field becomes predominantly radial. A
Externí odkaz:
http://arxiv.org/abs/2301.12183
Autor:
Nita, Gelu M., Fleishman, Gregory D., Kuznetsov, Alexey A., Anfinogentov, Sergey A., Stupishin, Alexey G., Kontar, Eduard P., Schonfeld, Samuel J., Klimchuk, James A., Gary, Dale E.
To facilitate the study of solar active regions and flaring loops, we have created a modeling framework, the freely distributed GX Simulator IDL package, that combines 3D magnetic and plasma structures with thermal and non-thermal models of the chrom
Externí odkaz:
http://arxiv.org/abs/2301.00795