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We investigate the decayless regime of coronal kink oscillations recently discovered in the Solar Dynamics Observatory (SDO)/AIA data. In contrast to decaying kink oscillations that are excited by impulsive dynamical processes, this type of…

太阳与恒星天体物理 · 物理学 2015-11-18 S. A. Anfinogentov , V. M. Nakariakov , G. Nisticò

We present the first SDO AIA observations of a global coronal EUV disturbance (so-called "EIT wave") revealed in unprecedented detail. The disturbance observed on 2010 April 8 exhibits two components: one diffuse pulse superimposed on which…

太阳与恒星天体物理 · 物理学 2014-04-04 Wei Liu , Nariaki V. Nitta , Carolus J. Schrijver , Alan M. Title , Theodore D. Tarbell

Quasi-periodic disturbances have been observed in the outer solar atmosphere for many years now. Although first interpreted as upflows (Schrijver et al. (1999)), they have been widely regarded as slow magnetoacoustic waves, due to observed…

太阳与恒星天体物理 · 物理学 2015-06-05 G. Kiddie , I. De Moortel , G. Del Zanna , S. W. McIntosh , I. Whittaker

We report the simultaneous presence of chromospheric umbral flashes and associated umbral waves, and propagating coronal disturbances, in a sunspot and related active region. We have analyzed time-distance maps obtained using the…

太阳与恒星天体物理 · 物理学 2017-12-13 Aishawnnya Sharma , G. R. Gupta , Durgesh Tripathi , V. Kashyap , Amit Pathak

Waves have long been thought to contribute to the heating of the solar corona and the generation of the solar wind. Recent observations have demonstrated evidence of quasi-periodic longitudinal disturbances and ubiquitous transverse wave…

太阳与恒星天体物理 · 物理学 2015-06-16 J. Threlfall , I. De Moortel , S. W. McIntosh , C. Bethge

A comparison between a Coronal Hole (CH) and the adjacent Quiet-Sun (QS) has been performed using spectroscopic diagnostics of Hinode/ the EUV Imaging Spectrometer (EIS). Coronal funnels play an important role in the formation and…

太阳与恒星天体物理 · 物理学 2015-11-04 P. Kayshap , D. Banerjee , A. K. Srivastava

Alfv\'enic waves are thought to play an important role in coronal heating and acceleration of solar wind. Here we investigated the statistical properties of Alfv\'enic waves along spicules (jets that protrude into the corona) in a polar…

太阳与恒星天体物理 · 物理学 2015-05-28 Takenori J. Okamoto , Bart De Pontieu

Coronal holes (CHs) are regions of open magnetic flux which are the source of high speed solar wind (HSSW) streams. To date, it is not clear which aspects of CHs are of most influence on the properties of the solar wind as it expands…

太阳与恒星天体物理 · 物理学 2018-12-12 Tadhg M. Garton , Sophie A. Murray , Peter T. Gallagher

Waves are important for the heating of the solar corona and the acceleration of the solar wind. We have examined a long spectral time series of a southern coronal hole observed on the 25th February 1997, with the SUMER spectrometer on-board…

太阳与恒星天体物理 · 物理学 2015-05-13 G. R. Gupta , E. O'Shea , D. Banerjee , M. Popescu , J. G. Doyle

The fast coronal mass ejection (CME) from 23 July 2012 raised attention due to its extremely short transit time from Sun to 1 AU of less than 21 h. In-situ data from STEREO-A revealed the arrival of a fast forward shock with a speed of more…

太阳与恒星天体物理 · 物理学 2015-06-23 Manuela Temmer , Nariaki Nitta

We present EIS/Hinode & SUMER/SoHO joint observations allowing the first spectroscopic detection of accelerating disturbances as recorded with coronal lines in inter-plume and plume regions of a polar coronal hole. From time-distance…

太阳与恒星天体物理 · 物理学 2010-06-28 G. R. Gupta , D. Banerjee , L. Teriaca , S. Imada , S. Solanki

Multi-spacecraft observations are used to study the in-situ effects of a large CME erupting from the farside of the Sun on 3 November 2011, with particular emphasis on the associated solar energetic particle (SEP) event. At that time both…

太阳与恒星天体物理 · 物理学 2013-12-12 A. J. Prise , L. K. Harra , S. A. Matthews , D. M. Long , A. D. Aylward

The discovery of ubiquitous low-frequency (3-5mHz) Alfvenic waves in the solar chromosphere (with Hinode/SOT), and corona (with CoMP and the Solar Dynamics Observatory, SDO) has provided some insight into the non-thermal energy content of…

太阳与恒星天体物理 · 物理学 2015-06-12 Scott W. McIntosh , Bart De Pontieu

We investigate coronal heating and acceleration of the high- and low-speed solar wind in the open field region by dissipation of fast and slow magnetohydrodynamical (MHD) waves through MHD shocks. Linearly polarized \Alfven (fast MHD) waves…

天体物理学 · 物理学 2009-11-10 Takeru K. Suzuki

The differential rotation plays a crucial role in the dynamics of the Sun. We study the solar rotation and its correlation with solar activity by applying a modified machine learning algorithm to identify and track coronal bright points…

太阳与恒星天体物理 · 物理学 2024-07-30 Zahra Shokri , Nasibe Alipour , Hossein Safari

This paper reviews our growing understanding of the physics behind coronal heating (in open-field regions) and the acceleration of the solar wind. Many new insights have come from the last solar cycle's worth of observations and theoretical…

太阳与恒星天体物理 · 物理学 2010-02-02 Steven R. Cranmer , John L. Kohl , Mari Paz Miralles , Adriaan A. van Ballegooijen

The \textit{Sun Watcher using Active Pixel system detector and Image Processing}(SWAP) on board the \textit{PRoject for OnBoard Autonomy\todash 2} (PROBA\todash 2) spacecraft provides images of the solar corona in EUV channel centered at…

太阳与恒星天体物理 · 物理学 2012-06-11 K. Chandrashekhar , S. Krishna Prasad , D. Banerjee , B. Ravindra , Daniel B. Seaton

Analysis of a longitudinal wave event observed by the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) is presented. A time sequence of 131 A images reveals that a C-class flare occurred at one footpoint of a…

太阳与恒星天体物理 · 物理学 2015-09-23 Tongjiang Wang , Leon Ofman , Xudong Sun , Elena Provornikova , Joseph M. Davila

We have obtained H$\alpha$ high spatial and time resolution observations of the upper solar chromosphere and supplemented these with multi-wavelength observations from the Solar Dynamic Observatory (SDO) and the {\it Hinode}…

太阳与恒星天体物理 · 物理学 2015-05-27 Damian J. Christian , David B. Jess , Patrick Antolin , Mihalis Mathioudakis

This paper presents a detailed study of the type II solar radio burst that occurred on 06 March 2014 using combined data analysis. It is a classical radio event consisting of type III radio burst and a following type II radio burst in the…

太阳与恒星天体物理 · 物理学 2024-04-02 V. Vasanth