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相关论文: An Interpretation of Flare-Induced and Decayless C…

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Propagating disturbances are often observed in active region fan-like coronal loops. They were thought to be due to slow mode MHD waves based on some of the observed properties. But the recent studies involving spectroscopy indicate that…

太阳与恒星天体物理 · 物理学 2015-11-11 S. Mandal , T. Samanta , D. Banerjee , S. Krishna Prasad , L. Teriaca

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 investigate the transverse coronal-loop oscillations induced by the eruption of a prominence-carrying flux rope on 7 December 2012. The flux rope originating from NOAA Active Region (AR) 11621 was observed in EUV wavelengths by the…

太阳与恒星天体物理 · 物理学 2022-03-09 Q. M. Zhang , J. L. Chen , S. T. Li , L. Lu , D. Li

Identifying the underlying mechanisms behind the excitation of transverse oscillations in coronal loops is essential for their role as diagnostic tools in coronal seismology and their potential use as wave heating mechanisms of the solar…

太阳与恒星天体物理 · 物理学 2021-02-17 Konstantinos Karampelas , Tom Van Doorsselaere

Coronal loops act as resonant cavities for low frequency fluctuations that are transmitted from the deeper layers of the solar atmosphere and are amplified in the corona, triggering nonlinear interactions. However trapping is not perfect,…

太阳与恒星天体物理 · 物理学 2015-06-03 Andrea Verdini , Roland Grappin , Marco Velli

The aim of this work is to investigate and characterise non-thermal particle behaviour in a three-dimensional (3D) magnetohydrodynamical (MHD) model of unstable multi-threaded flaring coronal loops. We have used a numerical scheme which…

太阳与恒星天体物理 · 物理学 2018-03-21 J. Threlfall , A. W. Hood , P. K. Browning

We present a series of numerical simulations aimed at understanding the nature and origin of turbulence in coronal loops in the framework of the Parker model for coronal heating. A coronal loop is studied via reduced magnetohydrodynamics…

太阳与恒星天体物理 · 物理学 2015-03-13 A. F. Rappazzo , M. Velli , G. Einaudi

We present the analysis of three kinds of oscillating behavior using multi-wavelength observations of the 10 November 2013 (SOL2013-11-10T05:14) circular-ribbon flare. This event is a typical circular-ribbon flare with an outer spine…

太阳与恒星天体物理 · 物理学 2022-01-12 Zongjun Ning , Ya Wang , Zhenxiang Hong , Dong Li

The subject of this study is oscillations in the lower atmosphere in coronal-hole regions, where the conditions are favorable for propagation between the atmospheric layers. Based on spectroscopic observations in photospheric and…

太阳与恒星天体物理 · 物理学 2021-12-22 Andrei Chelpanov , Nikolai Kobanov , Maksim Chelpanov , Aleksandr Kiselev

We investigate the transverse oscillations of a line-tied multi-stranded coronal loop composed of several parallel cylindrical strands. First, the collective fast normal modes of the loop are found with the T-matrix theory. There is a huge…

太阳与恒星天体物理 · 物理学 2011-02-11 M. Luna , J. Terradas , R. Oliver , J. L. Ballester

Decayless kink oscillations of solar coronal loops are studied in terms of a low-dimensional model based on a randomly driven Rayleigh oscillator with coefficients experiencing random fluctuations. The model considers kink oscillations as…

太阳与恒星天体物理 · 物理学 2022-09-28 Valery M. Nakariakov , Dmitrii Y. Kolotkov , Sihui Zhong

Recent observations with the Atmospheric Imaging Assembly (AIA) instrument on the SDO spacecraft have revealed the existence of decayless coronal kink oscillations. These transverse oscillations are not connected to any external phenomena…

太阳与恒星天体物理 · 物理学 2019-06-06 K. Karampelas , T. Van Doorsselaere , D. J. Pascoe , M. Guo , P. Antolin

In this paper, I will present the recent progress on circular-ribbon flares (CRFs) and their related activities, including coronal jets, filaments, CMEs, radio bursts, coronal dimmings, and coronal loop oscillations. Owing to the prevalence…

太阳与恒星天体物理 · 物理学 2024-01-30 Qingmin Zhang

In recent years, the decay-less regime of standing transverse oscillations in coronal loops has been the topic of many observational and numerical studies, focusing on their physical characteristics, as well as their importance for coronal…

太阳与恒星天体物理 · 物理学 2020-07-29 Konstantinos Karampelas , Tom Van Doorsselaere

We used our newly developed magnetohydrodynamic (MHD) code to perform 2.5D simulations of a fast-mode MHD wave interacting with coronal holes (CH) of varying Alfv\'en speed which result from assuming different CH densities. We find that…

Propagating slow waves in coronal loops exhibit a damping which depends upon the frequency of the waves. In this study we aim to investigate the relationship of the damping length (L$_d$) with the frequency of the propagating wave. We…

太阳与恒星天体物理 · 物理学 2016-03-23 Sudip Mandal , Norbert Magyar , Ding Yuan , Tom Van Doorsselaere , Dipankar Banerjee

Strongly damped Doppler shift oscillations are observed frequently associated with flarelike events in hot coronal loops. In this paper, a review of the observed properties and the theoretical modeling is presented. Statistical measurements…

太阳与恒星天体物理 · 物理学 2014-04-24 Tongjiang Wang

We report decaying quasi-periodic intensity oscillations in the X-ray (6-12 keV) and extreme ultraviolet (EUV) channels (131, 94, 1600, 304 \AA) observed by the Fermi GBM (Gamma-ray Burst Monitor) and SDO/AIA, respectively, during a C-class…

太阳与恒星天体物理 · 物理学 2015-06-24 Pankaj Kumar , Valery M. Nakariakov , Kyung-Suk Cho

In the highly structured solar corona, resonant absorption is an unavoidable mechanism of energy transfer from global transverse MHD waves to local azimuthal Alfv\'en waves. Due to its localised nature, a direct detection of this mechanism…

太阳与恒星天体物理 · 物理学 2016-10-19 Patrick Antolin , Ineke De Moortel , Tom Van Doorsselaere , Takaaki Yokoyama

Slow magnetosonic waves associated with flares were observed in coronal loops by SOHO/SUMER, SDO/AIA in various EUV bandpasses, and other instruments. The excitation and damping of slow magnetosonic waves provides information on the…

太阳与恒星天体物理 · 物理学 2022-02-23 Leon Ofman , Tongjiang Wang