Zobrazeno 1 - 10
of 117
pro vyhledávání: '"Zongjun Ning"'
Publikováno v:
The Astrophysical Journal Letters, Vol 975, Iss 2, p L37 (2024)
Based on the observations by the Parker Solar Probe (PSP) during its encounter phases of approaching the Sun, I. C. Jebaraj et al. found that fundamental–harmonic (F-H) pairs constitute a majority of interplanetary (IP) type III radio bursts. In th
Externí odkaz:
https://doaj.org/article/7957c03a8ebe44f88a34e04bb01a5312
Publikováno v:
Universe, Vol 10, Iss 5, p 201 (2024)
We study the loop oscillations after a solar flare on 19 January 2023, in the active region N11E40 3196, which is well observed by the SDO/AIA. After tracing the loop position and fitting, we find that the loop oscillations have a period between 3 an
Externí odkaz:
https://doaj.org/article/15b5ea951ffd41f4afbcd0c6100873a1
Publikováno v:
The Astrophysical Journal, Vol 977, Iss 2, p 260 (2024)
Electron cyclotron maser (ECM) emission is an important coherent emission mechanism for the direct amplification of electromagnetic waves by nonthermal electrons in a magnetized plasma. This paper will report on our recent study on ECM emission by fa
Externí odkaz:
https://doaj.org/article/815affb3b36f46c2b84774bf2de5f389
Publikováno v:
The Astrophysical Journal, Vol 975, Iss 2, p 280 (2024)
In this paper, we investigate the thread displacement and intensity oscillations in a quiescent prominence observed by New Vacuum Solar Telescope at the H α line center on 2019 October 31. Each individual thread is traced by the local maximum intens
Externí odkaz:
https://doaj.org/article/ee79b5dadfdf48e699b4a014beb69d6d
Autor:
Zhao Wu, Alexey Kuznetsov, Sergey Anfinogentov, Victor Melnikov, Robert Sych, Bing Wang, Ruisheng Zheng, Xiangliang Kong, Baolin Tan, Zongjun Ning, Yao Chen
Publikováno v:
The Astrophysical Journal, Vol 968, Iss 1, p 5 (2024)
The origin of multiple peaks in light curves of various wavelengths remains illusive during flares. Here we discuss the flare of SOL2023-05-09T03:54M6.5 with six flux peaks as recorded by a tandem of new microwave and hard X-ray (HXR) instruments. Ac
Externí odkaz:
https://doaj.org/article/bea92f2be01c43a98639d8f3e3103e2a
Autor:
Dong Li, Fanpeng Shi, Haisheng Zhao, Shaolin Xiong, Liming Song, Wenxi Peng, Xinqiao Li, Wei Chen, Zongjun Ning
Publikováno v:
Frontiers in Astronomy and Space Sciences, Vol 9 (2022)
Quasi-periodic pulsations (QPPs), which carry time features and plasma characteristics of flare emissions, are frequently observed in light curves of solar/stellar flares. In this study, we investigated non-stationary QPPs associated with recurrent j
Externí odkaz:
https://doaj.org/article/0907624ad63546f098ad3134265accbe
Publikováno v:
Universe, Vol 9, Iss 5, p 215 (2023)
We have studied the quasi-periodic pulsations (QPPs) of the M2.3 flare that occurred in the active region NOAA 12172 on 23 September 2014. Through the fast Fourier transform (FFT) method, we decompose the flare light curves into fast- and slowly-vary
Externí odkaz:
https://doaj.org/article/bad347f136d045029f2c4cd8b2f2e1d9
Publikováno v:
The Astrophysical Journal, Vol 958, Iss 1, p 39 (2023)
We investigated oscillations in an M8.7 solar flare (SOL2014-10-22), including quasi-periodic pulsations (QPPs) in light curves and Doppler shift oscillations in the flare loops. Using Bayesian-based Markov Chain Monte Carlo, Fast Fourier Transform,
Externí odkaz:
https://doaj.org/article/a38028610c9941ae92897943eacfe9ac
Autor:
Dong Li, Chuan Li, Ye Qiu, Shihao Rao, Alexander Warmuth, Frederic Schuller, Haisheng Zhao, Fanpeng Shi, Jun Xu, Zongjun Ning
Publikováno v:
The Astrophysical Journal, Vol 954, Iss 1, p 7 (2023)
We investigate observational signatures of explosive chromospheric evaporation during a white-light flare (WLF) that occurred on 2022 August 27. Using the moment analysis, bisector techniques, and the Gaussian fitting method, redshifted velocities of
Externí odkaz:
https://doaj.org/article/4aad80f3b95a42f3b34ebbe9d80179b2
Publikováno v:
Universe, Vol 8, Iss 2, p 104 (2022)
We study the Quasi-Periodic Pulsations (QPPs) of an M4.4 class solar flare, which occurred in active region NOAA 11165 on 8 March 2011. With the Fast Fourier Transform (FFT) method, we decompose the flare light curve into fast- and slowly-varying com
Externí odkaz:
https://doaj.org/article/cfbee5ca8e5f41c69ea84a192c83415c