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We present a validation of our recently proposed non-conventional method, Constant Acceleration Accounted Perspective (CAAP), for estimating the instantaneous expansion speed of coronal mass ejection (CMEs), even when only single-point in…

太阳与恒星天体物理 · 物理学 2026-04-13 Anjali Agarwal , Wageesh Mishra , Mathew J. Owens , Tanja Amerstorfer

We present Nobeyama 45m telescope C18O, 13CO, and 12CO(1-0) mapping observations towards an interstellar filament in the Taurus molecular cloud. We investigate the gas velocity structure along the filament and in its surrounding parent…

星系天体物理 · 物理学 2018-09-26 Doris Arzoumanian , Yoshito Shimajiri , Shu-ichiro Inutsuka , Tsuyoshi Inoue , Kengo Tachihara

A neutrino outburst between September 2014 and March 2015 was discovered from the blazar TXS 0506+056 by an investigation of $9.5$ years of IceCube data, while the blazar was in a quiescent state during the outburst with a gamma-ray flux…

高能天体物理现象 · 物理学 2022-12-29 Kai Wang , Ruo-Yu Liu , Zhuo Li , Xiang-Yu Wang , Zi-Gao Dai

Coronal mass ejections (CMEs) are large-scale eruptions of plasma from the coronae of stars. Understanding the plasma processes involved in CME initiation has applications to space weather forecasting and laboratory plasma experiments.…

太阳与恒星天体物理 · 物理学 2018-03-21 Alexander W. James , Gherardo Valori , Lucie M. Green , Yang Liu , Mark C. M. Cheung , Yang Guo , Lidia van Driel-Gesztelyi

We have carried out a detailed analysis of the NANTEN 12CO(J=1-0) dataset in two large areas of ~25 square degrees towards SS433 (l~40 degree) and of ~18 square degrees towards l~348.5 degree, respectively. We have discovered two groups of…

We present the Solar Dynamics Observatory observations of two flux ropes respectively tracked out by material from a surge and a failed filament eruption on 2012 July 29 and August 04. For the first event, the interaction between the…

太阳与恒星天体物理 · 物理学 2019-08-19 Ting Li , Jun Zhang

We examine a small prominence eruption that occurred on 2014 May 1 at 01:35 UT and was observed by the Interface Region Imaging Spectrometer (IRIS) and the Atmospheric Imaging Assembly (AIA) on the Solar Dynamics Observatory (SDO). Pre- and…

太阳与恒星天体物理 · 物理学 2015-05-28 Katharine K. Reeves , Patrick I. McCauley , Hui Tian

Solar filaments often exhibit rotation and deflection during eruptions, which would significantly affect the geoeffectiveness of the corresponding coronal mass ejections (CMEs). Therefore, understanding the mechanisms that lead to such…

太阳与恒星天体物理 · 物理学 2023-08-21 Jinhan Guo , Ye Qiu , Yiwei Ni , Yang Guo , Chuan Li , Yuhang Gao , Brigitte Schmieder , Stefaan Poedts , Pengfei Chen

The interaction between Jupiter's magnetosphere and the solar wind is not well-constrained: while internal energetic plasma processes are thought to dominate plasma circulation, the solar wind nonetheless exerts significant control over the…

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

The highly elliptical polar orbit of the Juno mission provides a unique opportunity to simultaneously measure the compression state of Jupiter's magnetosphere and the total power emitted by the planet's ultraviolet aurora, using a single…

In this article we present results of the study on the association between the muon flux variation at ground level, registered by the \textit{\textit{New-Tupi}} muon telescopes ($22^0 53'00''S,\; 43^0 06'13'W$; 3 m above sea level) and a…

空间物理 · 物理学 2017-08-16 C. R. A. Augusto , C. E. Navia , M. N. de Oliveira , A. A. Nepomuceno , V. Kopenkin , T. Sinzi

The nature of various plausible causal links between sympathetic events is still a controversial issue. In this work, we present multi-wavelength observations of sympathetic eruptions, associated flares and coronal mass ejections (CMEs)…

太阳与恒星天体物理 · 物理学 2016-04-13 Navin Chandra Joshi , Brigitte Schmieder , Tetsuya Magara , Yang Guo , Guillaume Aulanier

We revisit the evidence for a "dust cloud" observed by the Cassini spacecraft at Saturn in 2006. The data of four instruments are simultaneously compared to interpret the signatures of a coherent swarm of dust that would have remained near…

地球与行星天体物理 · 物理学 2020-05-04 Emil Khalisi

The biggest halo coronal mass ejection (CME) since the Halloween storm in 2003, which occurred on 2006 December 13, is studied in terms of its solar source and heliospheric consequences. The CME is accompanied by an X3.4 flare, EUV dimmings…

In this study, we present a comprehensive observational and modeling study of a geo-effective event with D_ST index of -80 nT observed on 2011 May 28 when a coronal hole was bordering an active region. We analyze HMI and EUV images and…

太阳与恒星天体物理 · 物理学 2025-10-08 Nishu Karna , Tatiana Niembro

Interplanetary Coronal Mass Ejections (ICMEs) are the primary sources of geomagnetic storms at Earth. Negative out-of-ecliptic component (Bz) of magnetic field in the ICME or its associated sheath region is necessary for it to be…

太阳与恒星天体物理 · 物理学 2025-02-04 Talwinder Singh , Dinesha V. Hegde , Tae K. Kim , Nikolai V. Pogorelov

Voyager spacecraft (V1 and V2) provide unique in situ measurements of perturbations propagating beyond the heliopause through the very local interstellar medium (VLISM), including the shocks and pressure fronts whose origin is debated. In…

In this report we present two complex eruptive solar events and the associated Cosmic Ray effects (Forbush decrease). We use combined recordings from a number of Earthbound Receivers, Space Experiments and data archives (such as the…

It is well accepted that a magnetic flux rope (MFR) is a critical component of many coronal mass ejections (CMEs), yet how it evolves toward eruption remains unclear. Here we investigate the continuous evolution of a pre-existing MFR, which…

太阳与恒星天体物理 · 物理学 2019-01-30 Wensi Wang , Chunming Zhu , Jiong Qiu , Rui Liu , Kai E. Yang , Qiang Hu