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The GOES M2-class solar flare, SOL2010-06-12T00:57, was modest in many respects yet exhibited remarkable acceleration of energetic particles. The flare produced an ~50 s impulsive burst of hard X- and \gamma-ray emission up to at least 400…

高能天体物理现象 · 物理学 2017-02-22 Fermi GBM Collaboration , Fermi LAT Collaboration , B. R. Dennis , R. A. Schwartz , A. K. Tolbert

Employing the high spatio-temporal Interface Region Imaging Spectrograph 1330 {\AA} observations, we investigated the jet-like features that occurred during the X8.2 class flare in NOAA active region (AR) 12673 on 2017 September 10. These…

太阳与恒星天体物理 · 物理学 2018-12-11 Xiaohong Li , Jun Zhang , Shuhong Yang , Yijun Hou

We present high-resolution and multi-line observations of a C2-class solar flare, occurred in NOAA AR 12740 on May 6, 2019. The rise, peak and decay phases of the flare were recorded continuously and quasi-simultaneously in the Ca II K line…

太阳与恒星天体物理 · 物理学 2021-05-26 Rahul Yadav , C. J. D. Baso , J. de la Cruz Rodr'iguez , F. Calvo , R. Morosin

The GOES X1.5 class flare that occurred on August 30,2002 at 1327:30 UT is one of the few events detected so far at submillimeter wavelengths. We present a detailed analysis of this flare combining radio observations from 1.5 to 212 GHz (an…

太阳与恒星天体物理 · 物理学 2015-05-13 C. G. Gimenez de Castro , G. Trottet , A. Silva-Valio , S. Krucker , J. E. R. Costa , P. Kaufmann , E. Correia , H. Levato

The solar active region NOAA 11158 produced a series of flares during its passage through the solar disk. The first major flare (of class X2.2) of the current solar cycle occurred in this active region on 2011 February 15 around 01:50 UT.…

太阳与恒星天体物理 · 物理学 2015-06-17 A. Raja Bayanna , Brajesh Kumar , P. Venkatakrishnan , Shibu K Mathew , B. Ravindra , Savita Mathur , R. A. Garcia

The first near-side X-class flare of the Solar Cycle 24 occurred in February 2011 and produced a very strong seismic response in the photosphere. One sunquake was reported by Kosovichev (2011) followed by the discovery of a second sunquake…

太阳与恒星天体物理 · 物理学 2015-06-11 S. Zharkov , L. M. Green , S. A. Matthews , V. V. Zharkova

The Ultraviolet Coronagraph Spectrometer (UVCS) aboard the {\it SOHO} satellite has observed very fast Coronal Mass Ejections (CMEs) associated with X-class flares. These events show spectral signatures different than those seen in most…

天体物理学 · 物理学 2009-11-10 J. C. Raymond , A. Ciaravella , D. Dobrzycka , L. Strachan , Y. -K. Ko , M. Uzzo , N. -E. Raouafi

We present the results of a detailed analysis of multi-wavelength observations of a very impulsive solar flare 1B/M6.7, which occurred on 10 March, 2001 in NOAA AR 9368 (N27 W42). The observations show that the flare is very impulsive with…

天体物理学 · 物理学 2009-11-10 Wahab Uddin , Rajmal Jain , Keiji Yoshimura , Ramesh Chandra , T. Sakao , T. Kosugi , Anita Joshi , M. R. Despande

In this letter, we present a spectacular eruptive flare (X8.2) associated with a coronal mass ejection (CME) on 2017 September 10 at the west limb of the Sun. A flux rope eruption is followed by the inflow, the formation of a current sheet…

太阳与恒星天体物理 · 物理学 2018-02-14 X. L. Yan , L. H. Yang , Z. K. Xue , Z. X. Mei , D. F. Kong , J. C. Wang , Q. L. Li

In this paper, We report the interplanetary effects of a fast coronal mass ejection (CME) associated with the intense X2.7 flare that occurred on 05 May 2015. The near-Sun signatures of the CME at low-coronal heights $<$2 {R$_{\odot}$} are…

太阳与恒星天体物理 · 物理学 2016-06-01 Abhishek Johri , P. K. Manoharan

We investigate the X-ray and UV emission detected by RHESSI and TRACE in the context of a solar flare on the 16th November 2002 with the goal of better understanding the evolution of the flare. We analysed the characteristics of the X-ray…

太阳与恒星天体物理 · 物理学 2015-06-11 Hamish A. S. Reid , Nicole Vilmer , Guillaume Aulanier , Etienne Pariat

We report on active region EUV dynamic events observed simultaneously at high-cadence with SUMER/SoHO and TRACE. Although the features appear in the TRACE Fe ix/x 171A images as jets seen in projection on the solar disk, the SUMER spectral…

天体物理学 · 物理学 2009-11-13 M. S. Madjarska , J. G. Doyle , D. Innes , W. Curdt

We present the quasi-periodic slipping motion of flux rope structures prior to the onset of an eruptive X-class flare on 2015 March 11, obtained by the \emph{Interface Region Imaging Spectrograph} (\emph{IRIS}) and the \emph{Solar Dynamics…

太阳与恒星天体物理 · 物理学 2016-10-26 Ting Li , Kai Yang , Yijun Hou , Jun Zhang

A high-speed halo-type coronal mass ejection (CME), associated with a GOES M4.6 soft X-ray flare in NOAA AR 0180 at S12W29 and an EIT wave and dimming, occurred on 9 November 2002. A complex radio event was observed during the same period.…

天体物理学 · 物理学 2008-01-21 N. J. Lehtinen , S. Pohjolainen , K. Huttunen-Heikinmaa , E. Valtonen , R. Vainio , A. E. Hillaris

Large-scale solar eruptions have been extensively explored over many years. However, the properties of small-scale events with associated shocks have been rarely investigated. We present the analyses of a small-scale short-duration event…

太阳与恒星天体物理 · 物理学 2018-04-04 Beili Ying , Li Feng , Lei Lu , Jie Zhang , Jasmina Magdalenic , Yingna Su , Yang Su , Weiqun Gan

We explored simultaneous observations of chromospheric evaporation and condensation during the impulsive phase of a C6.7 flare on 9 May 2019. The solar flare was simultaneously observed by multiple instruments, i.e., the New Vacuum Solar…

太阳与恒星天体物理 · 物理学 2022-02-16 Dong Li , Zhenxiang Hong , Zongjun Ning

This paper investigates the temporal evolution of temperature, emission measure, energy loss and velocity in a C-class solar flare from both an observational and theoretical perspective. The properties of the flare were derived by following…

天体物理学 · 物理学 2009-11-13 Claire L. Raftery , Peter T. Gallagher , Ryan O. Milligan , James A. Klimchuk

In this paper, we present multiwavelength observations of helical kink instability as a trigger of a CME which occurred in AR NOAA 11163 on 24 February 2011. The CME was associated with a M3.5 limb flare. High resolution observations from…

太阳与恒星天体物理 · 物理学 2015-06-03 Pankaj Kumar , K. -S. Cho , S. -C. Bong , Sung-Hong Park , Y. H. Kim

This paper presents a multiwavelength study of the M8.0 flare and its associated fast halo CME that originated from a bipolar active region NOAA 10759 on 2005 May 13. The source active region has a conspicuous sigmoid structure at TRACE 171…

天体物理学 · 物理学 2009-11-13 Chang Liu , Jeongwoo Lee , Vasyl Yurchyshyn , Na Deng , Kyung-Suk Cho , Marian Karlicky , Haimin Wang

We report striking Doppler velocity gradients observed during the well-observed September 10th 2017 solar flare, and argue that they are consistent with the presence of an above-the-looptop termination shock beneath the flare current sheet.…

太阳与恒星天体物理 · 物理学 2024-02-08 Ryan J. French , Sijie Yu , Bin Chen , Chengcai Shen , Sarah A. Matthews