The Lyman-alpha Solar Telescope (LST) for the ASO-S mission — I. Scientific objectives and overview

Li, Hui; Chen, Bin; Li, Feng; Liu, Ying; Yu, Haitao; Li, Jingwei; Lu, Lei; Xue, Jian; Bao, Ying; Zhao, Jie; Yang, Yutong; Gan, Weiqun; Fang, Cheng; Song, Kefei; Wang, Hong; Guo, Quanfeng; He, Liwen; Zhu, Bo; Zhu, C. G.; Deng, Lei; Bao, H. Q.; Cao, C.; Yang, Zhongguang

doi:10.1088/1674-4527/19/11/158

Cited by 60 publications

(21 citation statements)

References 65 publications

(66 reference statements)

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“…In addition, multiperspective observations are quite necessary to fully understand the flaring Lyα emission. The Chinese Advanced Space-based Solar Observatory (ASO-S; Gan et al 2019) carries an Lyα Solar Telescope (Li et al 2019) that can provide the full-Sun Lyα images and also an HXR Imager (Zhang et al 2019) observing the Sun in the energy range of ∼30-200 keV. ASO-S will be launched into a Sun-synchronous orbit in late 2022.…”

Section: Insights Into the Future Lyα Workmentioning

confidence: 99%

The Lyα Emission in a C1.4 Solar Flare Observed by the Extreme Ultraviolet Imager aboard Solar Orbiter

De-chao

et al. 2022

ApJ

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The hydrogen Lyα (H i Lyα) emission during solar flares has rarely been studied in spatially resolved images, and its physical origin has not been fully understood. In this paper, we present novel Lyα images for a C1.4 solar flare (SOL2021-08-20T22:00) from the Extreme Ultraviolet Imager aboard Solar Orbiter, together with multi-wave-band and multiperspective observations from the Solar Terrestrial Relations Observatory Ahead and the Solar Dynamics Observatory spacecraft. It is found that the Lyα emission has a good temporal correlation with the thermal emissions at 1–8 Å and 5–7 keV, indicating that the flaring Lyα is mainly produced by a thermal process in this small event. However, nonthermal electrons play a minor role in generating Lyα at flare ribbons during the rise phase of the flare, as revealed by the hard X-ray imaging and spectral fitting. Besides originating from flare ribbons, the Lyα emission can come from flare loops, likely caused by plasma heating and also cooling that happen in different flare phases. It is also found that the Lyα emission shows fairly similar features to the He ii λ304 emission in light curve and spatiotemporal variation, along with small differences. These observational results improve our understanding of the Lyα emission in solar flares and also provide some insights for investigating the Lyα emission in stellar flares.

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Section: Insights Into the Future Lyα Workmentioning

confidence: 99%

The Lyα Emission in a C1.4 Solar Flare Observed by the Extreme Ultraviolet Imager aboard Solar Orbiter

De-chao

et al. 2022

ApJ

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“…These radio telescopes can provide extremely high temporal and spectral resolutions in a very broad frequency range. Moreover, new EUV imagers such as the Extreme Ultraviolet Imager (EUI) (Rochus et al 2020) aboard the Solar Orbiter have been successfully launched into space, and the Lyα solar telescope (LST) (Feng et al 2019;Li et al 2019) aboard the Advanced Space-based Solar Observatory (ASOS) will be launched in the near future (Gan et al 2019(Gan et al , 2022. Compared to their precursors, these instruments have much improved temporal and spatial resolutions and thus can have better synergy with the radio observations.…”

Section: Discussionmentioning

confidence: 99%

Spatially Resolved Moving Radio Burst Associated with an EUV Wave

Lu¹,

Feng²,

Gan³

2022

ApJL

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Coronal mass ejections (CMEs) are large clouds of magnetized plasma ejected from the Sun and are often associated with the acceleration of electrons that can result in radio emission via various mechanisms. However, the underlying mechanism relating the CMEs and particle acceleration still remains a subject of heated debate. Here, we report multi-instrument radio and extreme ultraviolet (EUV) imaging of a solar eruption event on 2011 September 24. We determine the emission mechanism of a moving radio burst, identify its three-dimensional location with respect to a rapidly expanding EUV wave, and find evidence for CME shocks that produce quasiperiodic acceleration of electron beams.

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“…Improved results are expected by using stereoscopic observations from three viewpoints (SDO, STA, and STB). In the future, the revised cone model will hopefully be applied to the CMEs observed by the Lyman-α Solar Telescope (LST; Li et al 2019) on board the Advanced Space-based Solar Observatory (ASO-S; Gan et al 2019) and the Metis (Antonucci et al 2020) on board the Solar Orbiter (Müller et al 2020).…”

Section: Discussion and Summarymentioning

confidence: 99%

A revised cone model and its application to non-radial prominence eruptions

Zhang

2021

Preprint

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Context. The traditional cone models achieve great success in studying the geometrical and kinematic properties of halo coronal mass ejections (CMEs). Aims. In this paper, a revised cone model is proposed to investigate the properties of CMEs as a result of non-radial prominence eruptions. Methods. The cone apex is located at the source region of an eruption instead of the Sun center. The cone axis deviates from the local vertical by an inclination angle of θ 1 and an angle of φ 1 . The length and angular width of the cone are r and ω, respectively. Results. The model is successfully applied to two CMEs originating from the western limb on 2011 August 11 and 2012 December 7. By comparing the projections of the cones with the CME fronts simultaneously observed by the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory (SDO) and the Extreme-Ultraviolet Imager (EUVI) on board the ahead Solar TErrestrial RElations Observatory (STEREO), the properties of the CMEs are derived, including the distance, angular width, inclination angle, deviation from the plane of the sky, and true speed in space. Conclusions. This revised cone model provides a new and complementary approach in exploring the whole evolutions of CMEs.

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The Lyman-alpha Solar Telescope (LST) for the ASO-S mission — I. Scientific objectives and overview

Cited by 60 publications

References 65 publications

The Lyα Emission in a C1.4 Solar Flare Observed by the Extreme Ultraviolet Imager aboard Solar Orbiter

The Lyα Emission in a C1.4 Solar Flare Observed by the Extreme Ultraviolet Imager aboard Solar Orbiter

Spatially Resolved Moving Radio Burst Associated with an EUV Wave

A revised cone model and its application to non-radial prominence eruptions

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