Zobrazeno 1 - 10
of 64
pro vyhledávání: '"Solar flare spectra"'
Autor:
Xuanqing Liu, Jing Liu, Junjie Chen, Liying Qian, Phillip C. Chamberlin, Yao Chen, Xiangliang Kong, Shuhan Li
Publikováno v:
The Astrophysical Journal Letters, Vol 974, Iss 1, p L19 (2024)
Previous investigations of ionospheric electrodynamical responses to solar flares primarily focused on the main phases (MPs) of solar flares. Typical solar irradiance models for driving global ionosphere models do not include the extreme ultraviolet
Externí odkaz:
https://doaj.org/article/b894ad4f79754a7a913aff7bca92e835
Autor:
Ying Li, Zhichen Jing, De-Chao Song, Qiao Li, Jun Tian, Xiaofeng Liu, Ya Wang, M. D. Ding, Andrea Francesco Battaglia, Li Feng, Hui Li, Weiqun Gan
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L3 (2024)
The white-light continuum emissions in solar flares (i.e., white-light flares) are usually observed on the solar disk but, in a few cases, off the limb. Here we present on-disk as well as off-limb continuum emissions at 3600 Å (in the Balmer continu
Externí odkaz:
https://doaj.org/article/8895993e86f043ce9b6ea80fae4ce5dd
Autor:
Jing Liu, Liying Qian, Wenbin Wang, Kevin Pham, Xiangliang Kong, Yao Chen, Wenlong Liu, Libo Liu, Xuanqing Liu
Publikováno v:
The Astrophysical Journal Letters, Vol 963, Iss 1, p L8 (2024)
Solar extreme-ultraviolet (EUV) irradiance is the dominant energy source for ionizing and heating the Earth’s upper atmosphere. It is common to assume that the spectra of different EUV lines have the same trend to fill the solar EUV irradiance gap
Externí odkaz:
https://doaj.org/article/099a5df4aceb441b94934aa7edd1d94d
Autor:
Sarah A. Jaeggli, Adrian N. Daw
Publikováno v:
The Astrophysical Journal, Vol 976, Iss 1, p 18 (2024)
A rich spectrum of molecular hydrogen (H _2 ) emission lines is seen in sensitive observations from the far-ultraviolet (FUV) channels of the Interface Region Imaging Spectrograph (IRIS) during flare activity in solar active region NOAA Active Region
Externí odkaz:
https://doaj.org/article/1c3756d952e24fcfa2ae1df4e95b8af2
Autor:
Xuanqing Liu, Liying Qian, Phillip C. Chamberlin, Yao Chen, Xiangliang Kong, Qing-He Zhang, Shuhan Li, Jing Liu
Publikováno v:
The Astrophysical Journal, Vol 974, Iss 2, p 157 (2024)
Effects of the extreme-ultraviolet (EUV) late phase of solar flares on the ionosphere were rarely studied. Here we simulated such effects on the ionospheric electron density using an ionosphere−thermosphere coupled model driven by the realistic sol
Externí odkaz:
https://doaj.org/article/68f294b9be80491ab5fd2c8a2aeadb77
Publikováno v:
The Astrophysical Journal, Vol 971, Iss 2, p 188 (2024)
Variations in X-ray and extreme ultraviolet (EUV) irradiance during solar flares lead to a noticeable increase in the electron concentration in the illuminated part of the Earth’s ionosphere. Due to the large amount of experimental data accumulated
Externí odkaz:
https://doaj.org/article/2b9c7091c97f4b17bbdc418cdeb0889c
Publikováno v:
The Astrophysical Journal, Vol 973, Iss 2, p 96 (2024)
The excess broadening of high-temperature spectral lines, long observed near the tops of flare arcades, is widely considered to result from magnetohydrodynamic turbulence. According to different theories, plasma turbulence is also believed to be a ca
Externí odkaz:
https://doaj.org/article/acc76e26537c4162b3ae87b3b657fbda
Publikováno v:
The Astrophysical Journal, Vol 972, Iss 1, p 48 (2024)
Hard X-ray (HXR) observations are crucial for understanding the initiation and evolution of solar eruptive events, as they provide a key signature of flare-accelerated electrons and heated plasma. The potential of high-cadence HXR imaging for deciphe
Externí odkaz:
https://doaj.org/article/0754b2a63ae04892ba064acfbdcde2c7
Publikováno v:
The Astrophysical Journal, Vol 970, Iss 1, p 21 (2024)
Solar flare ribbon fronts appear ahead of the bright structures that normally characterize solar flares, and can persist for an extended period of time in spatially localized patches before transitioning to “regular” bright ribbons. They likely r
Externí odkaz:
https://doaj.org/article/3d20ef021cc74aa493e77dc39710c1ce
Publikováno v:
The Astrophysical Journal, Vol 966, Iss 2, p 198 (2024)
In this study, we present the analysis of six solar flare events that occurred in 2022, using new data from the third-generation Miniature X-Ray Solar Spectrometer, also known as the Dual-zone Aperture X-ray Solar Spectrometer (DAXSS). The primary fo
Externí odkaz:
https://doaj.org/article/54b68d2733774ad7ba577f9360171273