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White-light flares (WLFs) are energetic activity in stellar atmosphere. However, the observed solar WLF is relatively rare compared to stellar WLFs or solar flares observed at other wavelengths, limiting our further understanding…

Solar and Stellar Astrophysics · Physics 2024-08-13 Yingjie Cai , Yijun Hou , Ting Li , Jifeng Liu

Using observations by the Solar Dynamics Observatory from June 2010 to December 2017, we have performed the first statistical investigation of circular-ribbon flares (CFs) and examined the white-light emission in these CFs. We find 90 CFs…

Solar and Stellar Astrophysics · Physics 2018-11-28 Yongliang Song , Hui Tian

White-light flares (WLFs) are usually tend to be those very large flares. Nevertheless, several small and compact WLFs have been reported and thought to be produced by low-height magnetic reconnection. However, whether low-height magnetic…

Solar and Stellar Astrophysics · Physics 2026-04-24 Yongliang Song

White-light flares (WLFs), first observed in 1859, refer to a type of solar flares showing an obvious enhancement of the visible continuum emission. This type of enhancement often occurs in most energetic flares, and is usually interpreted…

Solar and Stellar Astrophysics · Physics 2020-04-22 Yongliang Song , Hui Tian , Xiaoshuai Zhu , Yajie Chen , Mei Zhang , Jingwen Zhang

Solar white-light flares (WLFs) are solar flares exhibiting enhanced emission in the optical continuum. They are critical for understanding energy release and transport mechanisms in solar flares and for conducting comparative studies with…

Solar and Stellar Astrophysics · Physics 2026-01-21 Yingjie Cai , Yijun Hou , Hengkai Ding , Ting Li , Jifeng Liu

There are two goals in this study. One is to investigate how frequently white-light flares (WLFs) occur in a flare-productive active region (NOAA active region 11515). The other is to investigate the relationship between WLFs and magnetic…

Solar and Stellar Astrophysics · Physics 2018-06-06 Y. L. Song , H. Tian , M. Zhang , M. D. Ding

White light flares (WLFs) are observational rarities, making them understudied events. However, optical emission is a significant contribution to flare energy budgets and the emission mechanisms responsible could have important implications…

Solar and Stellar Astrophysics · Physics 2015-06-18 Graham Stewart Kerr , Lyndsay Fletcher

Continuum emission, also called white-light emission (WLE), and permanent changes of the magnetic field ($\Delta{B}_{{\rm{LOS}}}$) are often observed during solar flares. But their relation and their precise mechanisms are still unknown. We…

Solar and Stellar Astrophysics · Physics 2020-12-02 J. S. Castellanos Durán , L. Kleint

White-light (WL) flares have been observed and studied more than a century since the first discovery. However, some fundamental physics behind the brilliant emission remains highly controversial. One of the important facts in addressing the…

Solar and Stellar Astrophysics · Physics 2016-11-09 Nengyi Huang , Yan Xu , Haimin Wang

Context: White-light continuum observations of solar flares often have coronal counterparts, including the classical ``white-light prominence'' (WLP) phenomenon. Aims: Coronal emissions by flares, seen in white-light continuum, have only…

Solar and Stellar Astrophysics · Physics 2023-03-29 Dennis Fremstad , Juan Camilo Guevara Gómez , Hugh Hudson , Juan Carlos Martínez Oliveros

To understand the conditions that produce white-light (WL) enhancements in solar flares, a statistical analysis of visible continuum data as observed by Hinode/Solar Optical Telescope (SOT) was performed. In this study, approximately 100…

Solar and Stellar Astrophysics · Physics 2017-12-20 Kyoko Watanabe , Jun Kitagawa , Satoshi Masuda

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 {\AA} (in the…

Solar and Stellar Astrophysics · Physics 2024-02-13 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

Solar flares radiates energy at all wavelengths, but the spectral distribution of this energy is still poorly known. White-light continuum emission is sometimes observed and the flares are then termed "white-light flares" (WLF). In this…

Solar and Stellar Astrophysics · Physics 2015-03-19 M. Kretzschmar

Solar white-light flares (WLFs) have been observed since 1859, but their occurrence rate is not yet fully understood. The physical properties of WLFs in super active regions (SARs) are also well worth investigating. With full-disk images at…

Solar and Stellar Astrophysics · Physics 2025-09-16 Zhichen Jing , Ying Li , Jingwei Li , Qiao Li

Super active region NOAA 13664 produced 12 X-class flares (including the largest one, an occulted X8.7 flare, in solar cycle 25 so far) during 2024 May 8-15 and 11 of them are identified as white-light flares. Here we present various…

Solar and Stellar Astrophysics · Physics 2024-08-13 Ying Li , Xiaofeng Liu , Zhichen Jing , Wei Chen , Qiao Li , Yang Su , De-Chao Song , M. D. Ding , Li Feng , Hui Li , Weiqun Gan

Since the discovery of stellar superflares by Kepler satellite, these extremely energetic events have been studied in analogy to solar flares. Their white-light (WL) continuum emission has been interpreted as being produced by heated…

Solar and Stellar Astrophysics · Physics 2018-06-13 Petr Heinzel , Kazunari Shibata

We present observations of an M5.7 white-light flare (WLF) associated with a small filament eruption in NOAA active region 11476 on 2012 May 10. During this flare, a circular flare ribbon appeared in the east and a remote brightening…

Solar and Stellar Astrophysics · Physics 2018-02-28 Y. L. Song , Y. Guo , H. Tian , X. S. Zhu , M. Zhang , Y. J. Zhu

The hydrogen \lya\ line and the white-light (WL) continuum are two key diagnostics of energy transport in the lower atmosphere during solar flares, yet their relationship remains poorly understood. Here we present a statistical analysis of…

Solar and Stellar Astrophysics · Physics 2026-03-25 De-Chao Song , Ying Li , Qiao Li , Xiaofeng Liu

White-light flares are the flares with emissions visible in the optical continuum. They are thought to be rare and pose the most stringent requirements in energy transport and heating in the lower atmosphere. Here we present a nearly…

Solar and Stellar Astrophysics · Physics 2017-12-21 Q. Hao , K. Yang , X. Cheng , Y. Guo , C. Fang , M. D. Ding , P. F. Chen , Z. Li

Observations of the Sun's off-limb white-light (WL) flares offer rare opportunities to study the energy release and transport mechanisms in flare loops. One of the best such events was SOL2017-09-10, an X8.2 flare that occurred near the…

Solar and Stellar Astrophysics · Physics 2021-11-17 Junwei Zhao , Wei Liu , Jean-Claude Vial
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