Zobrazeno 1 - 10
of 82
pro vyhledávání: '"Judith T. Karpen"'
Publikováno v:
Nature Communications, Vol 15, Iss 1, Pp 1-11 (2024)
Abstract Mutual conversion of various kinds of magnetohydrodynamic (MHD) waves can have profound impacts on wave propagation, energy transfer, and heating of the solar chromosphere and corona. Mode conversion occurs when an MHD wave travels through a
Externí odkaz:
https://doaj.org/article/623cf8642a0f4aca81953620517e7be0
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 1, p 27 (2024)
The magnetic topology of erupting regions on the Sun is a key factor in the energy buildup and release, and the subsequent evolution of flares and coronal mass ejections (CMEs). The presence/absence of null points and separatrices dictates whether an
Externí odkaz:
https://doaj.org/article/703921f512da4e37a0b70c021d13330c
Autor:
Vadim M. Uritsky, Judith T. Karpen, Nour E. Raouafi, Pankaj Kumar, C. Richard DeVore, Craig E. Deforest
Publikováno v:
The Astrophysical Journal Letters, Vol 955, Iss 2, p L38 (2023)
We present results of a quantitative analysis of structured plasma outflows above a polar coronal hole observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) spacecraft. In a 6 hr interval of continuous high-
Externí odkaz:
https://doaj.org/article/2b3c8a4af4e24a61b8543781828f1ab2
Autor:
Pankaj Kumar, Judith T. Karpen, Vadim M. Uritsky, Craig E. Deforest, Nour E. Raouafi, C. Richard DeVore, Spiro K. Antiochos
Publikováno v:
The Astrophysical Journal Letters, Vol 951, Iss 1, p L15 (2023)
Microstreams are fluctuations in the solar wind speed and density associated with polarity-reversing folds in the magnetic field (also denoted switchbacks). Despite their long heritage, the origin of these microstreams/switchbacks remains poorly unde
Externí odkaz:
https://doaj.org/article/979cd62363c54f079e7e01c9a8d87da3
Autor:
Pankaj Kumar, Judith T. Karpen, Spiro K. Antiochos, C. Richard DeVore, Peter F. Wyper, Kyung-Suk Cho
Publikováno v:
The Astrophysical Journal, Vol 943, Iss 2, p 156 (2023)
We report a detailed analysis of a failed eruption and flare in active region 12018 on 2014 April 3 using multiwavelength observations from the Solar Dynamics Observatory/Atmospheric Imaging Assembly, IRIS, STEREO, and Hinode/Solar Optical Telescope.
Externí odkaz:
https://doaj.org/article/64112eeb916043da9425acbb402e86d8
Autor:
Nour E. Raouafi, Guillermo Stenborg, Dan B. Seaton, Haimin Wang, Jason Wang, Craig E. DeForest, Stuart D. Bale, James F. Drake, Vadim M. Uritsky, Judith T. Karpen, Carl R. DeVore, Alphonse C. Sterling, Timothy S. Horbury, Louise K. Harra, Sofiane Bourouaine, Justin C. Kasper, Pankaj Kumar, Tai D. Phan, Marco Velli
We present an overview of EUV solar observations showing evidence for ubiquitous small-scale jetting activity (i.e., a.k.a. jetlets) driven by magnetic reconnection that might be the primary driver of the solar wind at its source. The jetlets, like t
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::4fbd224afcfa8245436ff789a7073dad
https://doi.org/10.5194/egusphere-egu23-17376
https://doi.org/10.5194/egusphere-egu23-17376
Autor:
Pankaj Kumar, Judith T. Karpen, Spiro K. Antiochos, C. Richard DeVore, Peter F. Wyper, Kyung-Suk Cho
Publikováno v:
The Astrophysical Journal, 2023, Vol.943(2), pp.156 [Peer Reviewed Journal]
We report a detailed analysis of a failed eruption and flare in active region 12018 on 2014 April 3 using multiwavelength observations from SDO/AIA, IRIS, STEREO, and Hinode/SOT. At least four jets were observed to emanate from the cusp of this small
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::213484a3cefb144664c273004ccc11cc
http://arxiv.org/abs/2212.11159
http://arxiv.org/abs/2212.11159
We report a decaying kink oscillation of a flux rope during a confined eruptive flare, observed off the solar limb by SDO/AIA, that lacked a detectable white-light coronal mass ejection. The erupting flux rope underwent kinking, rotation, and apparen
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2f27f2ab3d0a5dcd660c60afb4199063
http://arxiv.org/abs/2205.03480
http://arxiv.org/abs/2205.03480
Autor:
Pankaj Kumar, Judith T. Karpen, Vadim M. Uritsky, Craig E. Deforest, Nour E. Raouafi, C. Richard DeVore
Coronal plumes are long, ray-like, open structures, which have been considered as possible sources for the solar wind. Their origin in the largely unipolar coronal holes has long been a mystery. Earlier spectroscopic and imaging observations revealed
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::eed87ebaf08ab5c103e02b0c1752913b
Autor:
Benjamin J. Lynch, Pankaj Kumar, Peter F. Wyper, Spiro K. Antiochos, Judith T. Karpen, C. Richard DeVore
Publikováno v:
The astrophysical journal, 2021, Vol.907(1) [Peer Reviewed Journal]
The magnetic breakout model, in which reconnection in the corona leads to destabilization of a filament channel, explains numerous features of eruptive solar events, from small-scale jets to global-scale coronal mass ejections (CMEs). The underlying
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::d1684c407e2d8e81c0878e83b75847d2
https://doi.org/10.3847/1538-4357/abca8b
https://doi.org/10.3847/1538-4357/abca8b