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Using joint observations from Hinode/EIS and the Atmospheric Imaging Array (AIA) on the Solar Dynamics Observatory we explore the asymmetry of coronal EUV line profiles. We find that asymmetries exist in all of the spectral lines studied,…

太阳与恒星天体物理 · 物理学 2012-01-26 Marybeth Sechler , Scott W. McIntosh , Hui Tian , Bart De Pontieu

Seismology of coronal loops using observations of damped transverse oscillations in combination with results from theoretical models is a tool to indirectly infer physical parameters in the solar atmospheric plasma. Existing seismology…

太阳与恒星天体物理 · 物理学 2015-06-18 Roberto Soler , Marcel Goossens , Jaume Terradas , Ramon Oliver

Decayless kink oscillations are frequently observed in solar coronal loops and are considered potential contributors to coronal heating. Despite the ubiquity of this wave phenomenon, its driving mechanism remains unclear. Studies to derive…

太阳与恒星天体物理 · 物理学 2026-03-04 Sudip Mandal , Cosima Breu , Hardi Peter

Recently, the availability of new high-spatial and -temporal resolution observations of the solar photosphere has allowed the study of the oscillations in small magnetic elements. Small magnetic elements have been found to host a rich…

太阳与恒星天体物理 · 物理学 2015-06-17 M. Stangalini , F. Berrilli , G. Consolini

Understanding the global rotational profile of the solar atmosphere and its variation is fundamental to uncovering a comprehensive understanding of the dynamics of the solar magnetic field and the extent of coupling between different layers…

We investigate intensity variations and energy deposition in five coronal loops in active region cores. These were selected for their strong variability in the AIA/SDO 94 {\AA} intensity channel. We isolate the hot Fe XVIII and Fe XXI…

太阳与恒星天体物理 · 物理学 2015-06-19 A. C. Cadavid , J. K. Lawrence , D. J. Christian , D. B. Jess , G. Nigro

We search for indications of waves in the 25-2000 MHz radio spectrum of the 1 August 2010 event (SOL2010-08-01T08:57:00L075C013), where fast propagating waves in the solar corona with the periods of 181, 69, and 40 seconds were detected in…

太阳与恒星天体物理 · 物理学 2016-12-14 M. Karlicky , J. Rybak

We analyse the temporal evolution of the inclination component of the magnetic field vector for the penumbral area of 25 isolated sunspots. Compared to previous works, the use of data from the HMI instrument aboard the SDO observatory…

太阳与恒星天体物理 · 物理学 2020-03-11 A. B. Griñón-Marín , A. Pastor Yabar , H. Socas-Navarro , R. Centeno

This paper separately evaluates the effects of inclination and asymmetry of solar coronal loops on the resonant absorption of kink magnetohydrodynamic (MHD) oscillations. We modelled a typical coronal loop by a straight and axisymmetric…

太阳与恒星天体物理 · 物理学 2021-04-06 Sirwan Amiri , Kayoomars Karami , Zanyar Ebrahimi

We use high spatial and temporal resolution observations, simultaneously obtained with the New Vacuum Solar Telescope and Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory, to investigate the high-frequency…

太阳与恒星天体物理 · 物理学 2018-03-28 Feng Wang , Hui Deng , Bo Li , Song Feng , Xianyong Bai , Linhua Deng , Yunfei Yang , Zhike Xue , Rui Wang

We present detailed analysis of an extreme ultraviolet (EUV) wave and its interaction with active region (AR) loops observed by the Solar Dynamics Observatory/Atmospheric Imaging Assembly and the Hinode EUV Imaging Spectrometer (EIS). This…

太阳与恒星天体物理 · 物理学 2015-06-16 Liheng Yang , Jun Zhang , Wei Liu , Ting Li , Yuandeng Shen

Using MHD seismology by observed kink waves, the magnetic field profile of a coronal streamer has been investigated. STEREO-B/EUVI temporal image data on 7 March 2012 shows an evolution of two consecutive EUV waves that interact with the…

太阳与恒星天体物理 · 物理学 2016-08-17 A. K. Srivastava , Talwinder Singh , Leon Ofman , B. N. Dwivedi

We present a statistical study of 62 coronal dimming events associated with Earth-directed CMEs during the quasi-quadrature period of STEREO and SDO. This unique setting allows us to study both phenomena in great detail and compare…

太阳与恒星天体物理 · 物理学 2019-04-10 Karin Dissauer , Astrid M. Veronig , Manuela Temmer , Tatiana Podladchikova

It is typically assumed that emission in the passbands of the Atmospheric Imaging Assembly (AIA) onboard the Solar Dynamics Observatory (SDO) is dominated by single or several strong lines from ions that under equilibrium conditions are…

太阳与恒星天体物理 · 物理学 2017-10-23 Juan Martinez-Sykora , Bart De Pontieu , Paola Testa , Viggo Hansteen

A web-based, interactive system for the remote processing of imaging data sets (i.e., EUV, X-ray and microwave) and the automated interactive detection of wave and oscillatory phenomena in the solar atmosphere is presented.The system…

太阳与恒星天体物理 · 物理学 2015-05-19 R. A. Sych , V. M. Nakariakov , S. Anfinogentov , L. Ofman

We consider the problem of automatically (and robustly) isolating and extracting information about waves and oscillations observed in EUV image sequences of the solar corona with a view to near real-time application to data from the…

天体物理学 · 物理学 2009-11-13 Scott W. McIntosh , Bart De Pontieu , Steven Tomczyk

Using multi-wavelength observations of SoHO/MDI, SOT-Hinode/blue-continuum (4504 \AA), G-band (4305 \AA), Ca II H (3968 \AA) and TRACE 171 \AA, we present the observational signature of highly twisted magnetic loop in AR 10960 during the…

太阳与恒星天体物理 · 物理学 2015-05-18 A. K. Srivastava , T. V. Zaqarashvili , Pankaj Kumar , M. L. Khodachenko

In this work we review the efforts that have been done to study the excitation of the standing fast kink body mode in coronal loops. We mainly focus on the time-dependent problem, which is appropriate to describe flare or CME induced kink…

太阳与恒星天体物理 · 物理学 2010-02-23 J. Terradas

Context. It is possible to detect and track coronal bright points (CBPs) in SDO/AIA images. Combination of high resolution and high cadence provides a wealth of data that can be used to determine velocity flows on the solar surface with…

太阳与恒星天体物理 · 物理学 2016-02-17 Davor Sudar , Steven H. Saar , Ivica Skokić , Ivana Poljančić Beljan , Roman Brajša

Observations from the Solar Dynamics Observatory (SDO) have the potential for allowing the helioseismic study of the formation of hundreds of active regions, which would enable us to perform statistical analyses. Our goal is to collate a…

太阳与恒星天体物理 · 物理学 2016-09-08 H. Schunker , D. C. Braun , A. C. Birch , R. B. Burston , L. Gizon