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Coronal mass ejections (CMEs) are a major driver of space weather as they propagate through the heliosphere. Many CMEs have associated prominence material entangled in their magnetic structure which contains cooler plasma. This cooler CME…

太阳与恒星天体物理 · 物理学 2026-02-11 Chloe Pistelli , Momchil E Molnar , Giuliana de Toma , Joseph Plowman

Solar energetic particles acceleration by a shock wave accompanying a coronal mass ejection (CME) is studied. The description of the accelerated particle spectrum evolution is based on the numerical calculation of the diffusive transport…

高能天体物理现象 · 物理学 2017-02-09 A. S. Petukhova , I. S. Petukhov , S. I. Petukhov , L. T. Ksenofontov

Explosive energy release in the solar atmosphere is driven magnetically, but mechanisms triggering the onset of the eruption remain in debate. In the case of flares and CMEs, ideal or non-ideal instabilities usually occur in the corona, but…

太阳与恒星天体物理 · 物理学 2024-09-10 Jiong Qiu

Coronal Mass Ejections (CMEs) are challenging objects to detect using automated techniques, due to their high velocity and diffuse, irregular morphology. A necessary step to automating the detection process is to first remove the…

天体物理学 · 物理学 2008-04-15 C. Alex Young , Peter T. Gallagher

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 how coronal mass ejections (CMEs) propagate through, and interact with, the inner heliosphere between the Sun and Earth, a key question in CME research and space weather forecasting. CME Sun-to-Earth kinematics are…

太阳与恒星天体物理 · 物理学 2015-06-15 Ying D. Liu , Janet G. Luhmann , Noé Lugaz , Christian Möstl , Jackie A. Davies , Stuart D. Bale , Robert P. Lin

Fast coronal mass ejections (CMEs) generate standing or bow shocks as they propagate through the corona and solar wind. Although CME shocks have previously been detected indirectly via their emission at radio frequencies, direct imaging has…

太阳与恒星天体物理 · 物理学 2015-05-28 Shane A. Maloney , Peter T. Gallagher

Solar prominences are cool, dense stable structures routinely observed in the corona. Prominences are often ejected from the Sun via coronal mass ejections (CMEs). However, they are rarely detected in a cool, low-ionized state within CMEs…

The evolution of the magnetic field and plasma quantities inside a coronal mass ejection (CME) with distance are known from statistical studies using data from 1 au monitors, planetary missions, Helios, and Ulysses. This does not cover the…

太阳与恒星天体物理 · 物理学 2019-11-06 Nada Al-Haddad , Noe Lugaz , Stefaan Poedts , Charles J. Farrugia and , Teresa Nieves-Chinchilla

Modeling of transient events in the solar atmosphere requires the confluence of 3 critical elements: (1) model sophistication, (2) data availability, and (3) data assimilation. This white paper describes required advances that will enable…

天体物理仪器与方法 · 物理学 2023-01-02 M. Rempel , Y. Fan , M. Dikpati , A. Malanushenko , M. D. Kazachenko , M. C. M. Cheung , G. Chintzoglou , X. Sun , G. H. Fisher , T. Y. Chen

Common-envelope events (CEEs), during which two stars temporarily orbit within a shared envelope, are believed to be vital for the formation of a wide range of close binaries. For decades, the only evidence that CEEs actually occur has been…

高能天体物理现象 · 物理学 2015-03-13 N. Ivanova , S. Justham , J. L. Avendano Nandez , J. C. Lombardi

We discuss features of coronal mass ejections (CMEs) that are specific to heliospheric observations at large elongation angles. Our analysis is focused on a series of two eruptions that occurred on 2007 January 24-25, which were tracked by…

空间物理 · 物理学 2009-05-18 N. Lugaz , A. Vourlidas , I. I. Roussev , C. Jacobs , W. B. Manchester , O. Cohen

We present a novel three-dimensional (3D) model of coronal mass ejections (CMEs) that unifies all key evolutionary aspects of CMEs and encapsulates their 3D magnetic field configuration. This fully analytic model is capable of reproducing…

空间物理 · 物理学 2017-03-07 Alexey Isavnin

In this study we refine a CME model presented in an earlier study on the global energetics of solar flares and associated CMEs, and apply it to all (860) GOES M- and X-class flare events observed during the first 7 years (2010-2016) of the…

太阳与恒星天体物理 · 物理学 2017-09-26 Markus J. Aschwanden

A Coronal Mass Ejection (CME) is an inhomogeneous structure consisting of different features which evolve differently with the propagation of the CME. Simultaneous heliospheric tracking of different observed features of a CME can improve…

太阳与恒星天体物理 · 物理学 2015-05-20 Wageesh Mishra , Nandita Srivastava

Coronal mass ejections (CMEs) are intense solar explosive eruptions. CMEs are highly important players in solar-terrestrial relationships, and they have important consequences for major geomagnetic storms and energetic particle events. It…

空间物理 · 物理学 2019-02-20 Hengqiang Feng , Yan Zhao , Guoqing Zhao , Qiang Liu , Dejin Wu

Context. Observations reveal that shocks can be driven by fast coronal mass ejections (CMEs) and play essential roles in particle accelerations. A critical ratio, $\delta$, derived from a shock standoff distance normalized by the radius of…

太阳与恒星天体物理 · 物理学 2022-04-20 Beili Ying , Li Feng , Bernd Inhester , Marilena Mierla , Weiqun Gan , Lei Lu , Shuting Li

We present a detailed study of an earth-directed coronal mass ejection (Full halo CME) event happened on 2011 February 15 making use of white light observations by three coronagraphs and radio observations by Wind/WAVES. We applied three…

太阳与恒星天体物理 · 物理学 2017-02-08 Lei Lu , Bernd Inhester , Li Feng , Siming Liu , Xinhua Zhao

Coronal mass ejections (CMEs) are explosive events that occur basically daily on the Sun. It is thought that these events play a crucial role in the angular momentum and mass loss of late-type stars, and also shape the environment in which…

太阳与恒星天体物理 · 物理学 2017-09-20 Heidi Korhonen , Krisztian Vida , Martin Leitzinger , Petra Odert , Orsolya Eszter Kovacs

While flare-associated CMEs generally show a strong association between flare X-ray flux and CME kinematics, their volumetric evolution and its link to both kinematics and flare activity remains less explored. In this study, we investigate…

太阳与恒星天体物理 · 物理学 2026-05-05 Ashutosh Pattnaik , Nat Gopalswamy , Ranadeep Sarkar , Hong Xie , Sachiko Akiyama , Grzegorz Michalek