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High-energy stellar irradiation can photoevaporate planetary atmospheres, which can be observed in spectroscopic transits of hydrogen lines. For the exoplanet HD189733b, multiple observations in the Ly-$\alpha$ line have shown that…

Earth and Planetary Astrophysics · Physics 2021-11-24 Gopal Hazra , Aline A. Vidotto , Stephen Carolan , Carolina Villarreal D'Angelo , Ward Manchester

Solar magnetic flux rope (MFR) plays a central role in the physics of coronal mass ejections (CMEs). It mainly includes a cold filament at typical chromospheric temperatures (10000 K) and a hot channel at high coronal temperatures (10 MK).…

Solar and Stellar Astrophysics · Physics 2024-04-16 Leping Li , Hongqiang Song , Hardi Peter , Lakshmi Pradeep Chitta , Xin Cheng , Zhentong Li , Guiping Zhou

We study a coronal mass ejection (CME) associated with an X-class flare, whose initiation is clearly observed in low corona with high-cadence, high-resolution EUV images, providing us a rare opportunity to witness the early evolution of an…

Solar and Stellar Astrophysics · Physics 2014-11-26 Rui Liu , Yuming Wang , Chenglong Shen

Solar coronal mass ejections (CMEs) have a strong association with solar flares that is not fully understood. This characteristic of our Sun's magnetic activity may also occur on other stars, but the lack of successfully detected stellar…

Solar and Stellar Astrophysics · Physics 2022-08-31 Maurice L. Wilson , John C. Raymond

It is now generally accepted that the impulsive acceleration of a coronal mass ejection (CME) in the inner corona is closely correlated in time with the main energy release of the associated solar flare. In this paper, we examine in detail…

Solar and Stellar Astrophysics · Physics 2015-05-18 X. Cheng , J. Zhang , M. D. Ding , W. Poomvises

Coronal Mass Ejections (CMEs) may have major importance for planetary and stellar evolution. Stellar CME parameters, such as mass and velocity, have yet not been determined statistically. So far only a handful of stellar CMEs has been…

Solar and Stellar Astrophysics · Physics 2020-02-26 M. Leitzinger , P. Odert , R. Greimel , K. Vida , L. Kriskovics , E. W. Guenther , H. Korhonen , F. Koller , A. Hanslmeier , Zs. Kővári , H. Lammer

We present an analysis of {\it in situ} and remote-sensing measurements of a coronal mass ejection (CME) that erupted on 2021 February 20 and impacted both the Solar TErrestrial RElations Observatory (STEREO)-A and the {\it Wind}…

Coronal mass ejection (CME) often produces a soft X-ray (SXR) flare associated with the low-coronal reconnection and a type-II radio burst associated with an interplanetary (IP) CME-shock. SXR flares and type-II bursts outshine the…

Solar and Stellar Astrophysics · Physics 2024-10-02 Atul Mohan , Nat Gopalswamy , Hemapriya Raju , Sachiko Akiyama

We analyze a coronal mass ejection (CME) which resulted from an intense flare in active region AR486 on November 4, 2003. The CME propagation and speed are studied with interplanetary scintillation images, near-Earth space mission data, and…

Solar and Stellar Astrophysics · Physics 2015-05-13 M. Lahkar , P. K. Manoharan , K. Mahalakshmi , K. Prabhu , G. Agalya , S. Shaheda Begum , P. Revathi

We study the coronal dimming caused by the fast halo CME (deprojected speed v =1250 km s $^{-1})$ associated with the C3.7 two-ribbon flare on 2012 September 27, using Hinode/EIS spectroscopy and SDO/AIA Differential Emission Measure (DEM)…

Solar and Stellar Astrophysics · Physics 2019-07-17 Astrid M. Veronig , Peter Gömöry , Karin Dissauer , Manuela Temmer , Kamalam Vanninathan

We report observations of thermal emission from the frontal structure of a coronal mass ejection (CME) using data obtained with the Gauribidanur RAdioheliograPH (GRAPH) simultaneously at 80 MHz and 53 MHz on 2016 May 1. The CME was due to…

Solar and Stellar Astrophysics · Physics 2021-05-05 R. Ramesh , A. Kumari , C. Kathiravan , D. Ketaki , T. J. Wang

Stellar coronal mass ejections (CMEs) from host stars are an important factor that affects the habitability of exoplanets. Although their solar counterparts have been well observed for decades, it is still very difficult to find solid…

Solar and Stellar Astrophysics · Physics 2024-02-20 Zihao Yang , Hui Tian , Yingjie Zhu , Yu Xu , Linyi Chen , Zheng Sun

Flares on the Sun are often associated with ejected plasma: these events are known as coronal mass ejections (CMEs). These events, although are studied in detail on the Sun, have only a few dozen known examples on other stars, mainly…

Solar and Stellar Astrophysics · Physics 2024-12-25 K. Vida , B. Seli , T. Szklenár , L. Kriskovics , A. Görgei , Zs. Kővári

We present the application of novel diagnostics to the spectroscopic observation of a Coronal Mass Ejection (CME) on disk by the Extreme Ultraviolet Imaging Spectrometer (EIS) on the Hinode spacecraft. We apply a recently developed line…

Solar and Stellar Astrophysics · Physics 2010-08-31 S. W. McIntosh , B. De Pontieu , R. J. Leamon

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…

Solar and Stellar Astrophysics · Physics 2016-06-01 Abhishek Johri , P. K. Manoharan

Interest in stealth coronal mass ejections (CMEs) is increasing due to their relatively high occurrence rate and space weather impact. However, typical CME signatures such as extreme-ultraviolet dimmings and post-eruptive arcades are hard…

Energetic flares and associated coronal mass ejections (CMEs) from young magnetically active solar-like stars can play a critical role in setting conditions for atmospheric escape as well aspenetration of accelerated particles into their…

Solar and Stellar Astrophysics · Physics 2020-01-08 Christina Kay , Vladimir S. Airapetian , Theresa Lüftinger , Oleg Kochukhov

Solar eruptive events, including solar flares and coronal mass ejections (CMEs), are typically characterised by energetically significant X-ray emissions from flare-accelerated electrons and hot thermal plasmas. Occulted events, where the…

Solar and Stellar Astrophysics · Physics 2024-11-13 Laura A. Hayes , Säm Krucker , Hannah Collier , Daniel Ryan

The coronal blowout jet, extreme ultraviolet (EUV) wave and coronal mass ejection (CME) are common phenomena in the solar atmosphere. In this paper, we report the occurrence of an M-shaped CME event associated with a blowout jet and an EUV…