Zobrazeno 1 - 10
of 85
pro vyhledávání: '"Solar active region magnetic fields"'
Autor:
Judit Muraközy
Publikováno v:
Universe, Vol 10, Iss 8, p 318 (2024)
Studies of active region (AR) lifetimes are mostly restricted to short-lived ARs. The aim of this paper is to include recurrent ARs, which should be identified unambiguously. The first step is the algorithmic listing of possible returns; then, the ca
Externí odkaz:
https://doaj.org/article/80db96f1588c42758f97c2317c43da85
Autor:
Merlin Malonzo Mendoza, Chia-Hsien Lin
Publikováno v:
The Astrophysical Journal Letters, Vol 977, Iss 1, p L27 (2024)
Solar pores are transient dark spots in the continuum images of the Sun. Their dynamics are closely associated with solar magnetic fields and plasma motion. Their motions have been found to be correlated with their magnetic pressure differences. This
Externí odkaz:
https://doaj.org/article/1305ad13dac04bcc8ad1249123603585
Autor:
James McKevitt, Robert Jarolim, Sarah Matthews, Deborah Baker, Manuela Temmer, Astrid Veronig, Hamish Reid, Lucie Green
Publikováno v:
The Astrophysical Journal Letters, Vol 961, Iss 2, p L29 (2024)
The cause of excess spectral line broadening (nonthermal velocity) is not definitively known, but given its rise before and during flaring, the causal processes hold clues to understanding the triggers for the onset of reconnection and the release of
Externí odkaz:
https://doaj.org/article/3cdb509c8d764419936e628f8eb28ee4
Autor:
Xuebao Li, Xuefeng Li, Yanfang Zheng, Ting Li, Pengchao Yan, Hongwei Ye, Shunhuang Zhang, Xiaotian Wang, Yongshang Lv, Xusheng Huang
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 276, Iss 1, p 7 (2024)
The existing flare prediction primarily relies on photospheric magnetic field parameters from the entire active region (AR), such as Space-Weather HMI Activity Region Patches (SHARP) parameters. However, these parameters may not capture the details o
Externí odkaz:
https://doaj.org/article/3239e05655f44600ac02c9e87132a254
Autor:
Juan Guo, Huaning Wang, Jingxiu Wang, Xiaoshuai Zhu, Jing Huang, Shanqiang Chen, Bingxian Luo, Siqing Liu, Yuanyong Deng, Jiaben Lin
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 221 (2024)
We report an M9.3 flare and filaments activities from NOAA Active Region 11261 that are strongly modulated by the 3D magnetic skeleton. Magnetic field extrapolation from the vector magnetic field suggests complex magnetic connectivity and the existen
Externí odkaz:
https://doaj.org/article/b5b3a86ea3714f169c8f4646b2367d85
Publikováno v:
The Astrophysical Journal Supplement Series, Vol 275, Iss 1, p 6 (2024)
The accurate prediction of solar flares is crucial due to their risks to astronauts, space equipment, and satellite communication systems. Our research enhances solar flare prediction by employing sophisticated data preprocessing and sampling techniq
Externí odkaz:
https://doaj.org/article/767305266c7a4cc5843b41c26b472e95
Autor:
Shreeyesh Biswal, Marianna B. Korsós, Manolis K. Georgoulis, Alexander Nindos, Spiros Patsourakos, Robertus Erdélyi
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 259 (2024)
The R -value is a measure of the strength of photospheric magnetic polarity inversion lines in active regions (ARs). This work investigates the possibility of a relation between R -value variations and the occurrence of X-class flares in ARs, not in
Externí odkaz:
https://doaj.org/article/ad440d91213748b2b17f5f0924e4af75
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 1, p 58 (2024)
Understanding the mechanisms underlying the heating of the solar atmosphere is a fundamental problem in solar physics. The lower atmosphere of the Sun (i.e., photosphere and chromosphere) is composed of weakly ionized plasma. This results in anisotro
Externí odkaz:
https://doaj.org/article/8fc030bd51d04a1cbc12b89eb84c466a
Autor:
D. C. Braun
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 2, p 160 (2024)
We estimate the contributions to the solar-cycle variation of solar meridional and zonal flows near the surface expected solely from local magnetic regions. Maps of flows near magnetic regions are obtained using helioseismic holography and averaged o
Externí odkaz:
https://doaj.org/article/5008114ecd4c40fab0ab78854a0a21e8
Autor:
Yang Liu, Rudolf Komm, Nicholas H. Brummell, J. Todd Hoeksema, Bhishek Manek, Gherardo Valori
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 1, p 1 (2024)
Using Helioseismic and Magnetic Imager/Solar Dynamics Observatory data, we search for a relationship between kinetic helicity and magnetic helicity in solar active regions (ARs) using a sample of 62 ARs from 2010 May to 2015 May. The sample includes
Externí odkaz:
https://doaj.org/article/cff3a575f295439e9cb652cb85abcf84