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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 northern coronal hole observed on the 20th October 1996, with the SUMER spectrometer onboard…

太阳与恒星天体物理 · 物理学 2009-02-17 G. R. Gupta , E. O'Shea , D. Banerjee , M. Popescu , J. G. Doyle

We focus on detecting and studying quasi-periodic propagating features that have been interpreted both in terms of slow magneto-acoustic waves and of high speed upflows. We analyze long duration spectroscopic observations of the on-disk…

太阳与恒星天体物理 · 物理学 2012-09-27 G. R. Gupta , L. Teriaca , E. Marsch , S. K. Solanki , D. Banerjee

Employing Solar Dynamics Observatory/Atmospheric Imaging Assembly (AIA) multi-wavelength images, we have presented coronal condensations caused by magnetic reconnection between a system of open and closed solar coronal loops. In this…

太阳与恒星天体物理 · 物理学 2019-01-16 Leping Li , Jun Zhang , Peter Hardi , Lakshmi Pradeep Chitta , Jiangtao Su , Hongqiang Song , Chun Xia , Yijun Hou

We observed quiescent coronal loops using multi-wavelength observations from the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) on 2016 April 13. The flows at the footpoints of such loop systems are studied…

太阳与恒星天体物理 · 物理学 2019-10-02 Yamini K. Rao , Abhishek K. Srivastava , Pradeep Kayshap , Bhola N. Dwivedi

"EIT waves" are a globally propagating wavelike phenomenon. They were often interpreted as a fast-mode magnetoacoustic wave in the corona, despite various discrepancies between the fast-mode wave model and observations. To reconcile these…

太阳与恒星天体物理 · 物理学 2011-04-18 P. F. Chen , Y. Wu

There is evidence that coronal heating is highly intermittent, and flares are the high energy extreme. The properties of the heat pulses are difficult to constrain. Here hydrodynamic loop modeling shows that several large amplitude…

太阳与恒星天体物理 · 物理学 2016-08-03 F. Reale

High-frequency wave phenomena present a great deal of interest as one of the possible candidates to contribute to the energy input required to heat the corona as a part of the AC heating theory. However, the resolution of imaging…

太阳与恒星天体物理 · 物理学 2023-04-05 Elena Petrova , Norbert Magyar , Tom Van Doorsselaere , David Berghmans

We present observations of a B7.9-class flare that occurred on the 24th January, 2015, using the Atmopsheric Imaging Assembly (AIA) of the Solar Dynamics Observatory (SDO), the EUV Imaging Spectrometer (EIS) and the X-Ray Telescope of…

太阳与恒星天体物理 · 物理学 2017-03-29 Giuseppe Nisticò , Vanessa Polito , Valery M. Nakariakov , Giulio del Zanna

In this paper, we report our multiwavelength observations of the large-amplitude longitudinal oscillations of a filament on 2015 May 3. Located next to active region 12335, the sigmoidal filament was observed by the ground-based H$\alpha$…

太阳与恒星天体物理 · 物理学 2017-06-21 Q. M. Zhang , T. Li , R. S. Zheng , Y. N. Su , H. S. Ji

Standing long-period (with the periods longer than several minutes) oscillations in large hot (with the temperature higher than 3 MK) coronal loops have been observed as the quasi-periodic modulation of the EUV and microwave intensity…

太阳与恒星天体物理 · 物理学 2016-06-15 Sanjay Kumar , V. M. Nakariakov , Y. -J. Moon

Recurrent and propagating intensity perturbations are frequently observed in extreme ultraviolet (EUV) channels along coronal fan loops above sunspots, and these perturbations are suggested to be slow magnetoacoustic waves. Numerous studies…

太阳与恒星天体物理 · 物理学 2025-02-26 Junwei Zhao , Tongjiang Wang , Ruizhu Chen

High resolution movies in 193 A from the Atmospheric Imaging Assembly (AIA) on the Solar Dynamic Observatory SDO show apparent rotation in the leg of a prominence observed during a coordinated campaign. Such structures are commonly referred…

太阳与恒星天体物理 · 物理学 2017-01-11 B. Schmieder , P. Mein , N. Mein , P. J. Levens , N. Labrosse , L. Ofman

We detect and analyse transverse oscillations in a coronal loop, lying at the south east limb of the Sun as seen from the \textit{{Atmospheric Imaging Assembly}} (AIA) onboard \textit{{Solar Dynamics Observatory}} (SDO). The jet is believed…

太阳与恒星天体物理 · 物理学 2016-12-07 S. Sarkar , V. Pant , A. K. Srivastava , D. Banerjee

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

Coronal loop oscillations are common phenomena in the solar corona, which are often classified as decaying and decayless oscillations. Using the high-resolution observation measured by the Extreme Ultraviolet Imager (EUI) onboard the Solar…

太阳与恒星天体物理 · 物理学 2023-02-15 Dong Li , David M. Long

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 use a combination of analytical theory, numerical simulation, and data analysis to study the propagation of acoustic waves along coronal loops. We show that the intensity perturbation of a wave depends on a number of factors, including…

天体物理学 · 物理学 2009-11-10 J. A. Klimchuk , S. E. M. Tanner , I. De Moortel

Context. In previous work, we studied a prominence which appeared like a tornado in a movie made from 193 {\AA} filtergrams obtained with the Atmospheric Imaging Assembly (AIA) imager aboard the Solar Dynamics Observatory (SDO). The…

太阳与恒星天体物理 · 物理学 2019-03-27 M. Zapiór , B. Schmieder , P. Mein , N. Mein , N. Labrosse , M. Luna

We present results of a quantitative analysis of structured plasma outflows above a polar coronal hole observed by the Atmospheric Imaging Assembly onboard the Solar Dynamics Observatory spacecraft. In a 6-hour interval of continuous…

太阳与恒星天体物理 · 物理学 2023-09-13 Vadim M. Uritsky , Judith T. Karpen , Nour E. Raouafi , Pankaj Kumar , C. Richard DeVore , Craig E. Deforest

Understanding the relationship between the magnetic field and coronal heating is one of the central problems of solar physics. However, studies of the magnetic properties of impulsively heated loops have been rare. We present results from a…

太阳与恒星天体物理 · 物理学 2019-06-12 Ignacio Ugarte-Urra , Nicholas A. Crump , Harry P. Warren , Thomas Wiegelmann