Results 61 to 70 of about 1,743 (137)

MHD waves in sunspots

, 2015
The review addresses the spatial frequency morphology of sources of sunspot oscillations and waves, including their localization, size, oscillation periods, height localization with the mechanism of cut-off frequency that forms the observed emission ...
Abramov-Maximov, Bakunina, Balthasar, Balthasar, Balthasar, Beckers, Bel, Bellot Rubio, Bloomfield, Bogdan, Borrero, Botha, Braun, Brković, Brynildsen, Bárta, Cally, Cally, Centeno, Centeno, Chandra, Chen, Christopoulou, Christopoulou, Christopoulou, De Moortel, De Moortel, De Moortel, De Pontieu, De Pontieu, de Wijn, Dudík, Felipe, Finsterle, Fleck, Fludra, Fontenla, Gelfreikh, Gelfreikh, Harrison, Heggland, Heggland, Jain, Jefferies, Jess, Jess, Kalkofen, Karlicky, Khomenko, Khomenko, Khomenko, Kim, Kobanov, Kobanov, Kobanov, Kobanov, Kobanov, Kobanov, Kobanov, Kolobov, Kuridze, Lin, Lites, Lites, Lites, Liu, Maltby, Marsh, McIntosh, Merkulenko, Moradi, Nagashima, Nakariakov, Nakariakov, Nicholas, Nindos, Norman, Norton, Odstrcil, Parchevsky, Rae, Rendtel, Reznikova, Reznikova, Reznikova, Roberts, Rosenthal, Schunker, Settele, Shibasaki, Sigwarth, Sobotka, Srivastava, Srivastava, Srivastava, Staude, Suematsu, Sutmann, Sych, Sych, Sych, Sych, Sych, Sych, Taroyan, Thomas, Tziotziou, Tziotziou, Ulmschneider, Wang, Yuan, Yuan, Yuan, Zaitsev, Zandanov, Zandanov, Zandanov, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zhugzhda, Zuccarello   +124 more
core   +1 more source

Standing sausage modes in coronal loops with plasma flow [PDF]

, 2014
Magnetohydrodynamic waves are important for diagnosing the physical parameters of coronal plasmas. Field-aligned flows appear frequently in coronal loops.We examine the effects of transverse density and plasma flow structuring on standing sausage modes ...
Chen, Shao-Xia, Li, Bo, Xia, Li-Dong, Yu, Hui   +3 more
core   +1 more source

Successively Equatorward Propagating Ionospheric Acoustic Waves and Possible Mechanisms Following the Mw 7.5 Earthquake in Noto, Japan, on 1 January 2024

Space Weather, Volume 23, Issue 4, April 2025.
Abstract On 1 January 2024, the Mw 7.5 Noto Peninsula earthquake in Japan generated ionospheric disturbances detected via dense GNSS networks. Significant coseismic acoustic waves emerged ∼8 min post‐event, exhibiting 0.3 TECU amplitudes, 2–8 min periods, and ∼1 km/s propagation speeds.
Bing Zhang, Tong Liu, Xueshang Feng, Guochang Xu   +3 more
wiley   +1 more source

Global Coronal Waves

, 2016
After the {\em Solar and Heliospheric Observatory} ({\em SOHO}) was launched in 1996, the aboard Extreme Ultraviolet Imaging Telescope (EIT) observed a global coronal wave phenomenon, which was initially named "EIT wave" after the telescope.
Asai, Aschwanden, Attrill, Attrill, Balasubramaniam, Ballai, Biesecker, Carmichael, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Chen, Cheng, Cheng, Cliver, Cliver, Cohen, Dai, Delaboudinière, Delannée, Delannée, Delannée, Downs, Eto, Fang, Forbes, Francile, Gallagher, Gilbert, Gopalswamy, Gopalswamy, Grechnev, Harra, Hudson, Klassen, Krucker, Kumar, Kwon, Lara, Li, Liu, Liu, Liu, Long, Long, Low, Ma, Meyer, Moreton, Moses, Muhr, Nakariakov, Nakariakov, Nitta, Nitta, Ofman, Patsourakos, Patsourakos, Patsourakos, Patsourakos, Podladchikova, Pohjolainen, Ramsey, Schrijver, Selwa, Shen, Shen, Sterling, Svestka, Thompson, Thompson, Thompson, Thompson, Torsti, Tripathi, Uchida, Uchida, UeNo, Vernazza, Veronig, Vourlidas, Vršnak, Wang, Wang, Wang, Wang, Warmuth, Warmuth, Warmuth, Webb, West, White, White, Wild, Wills-Davey, Wills-Davey, Wills-Davey, Wills-Davey, Wu, Xue, Yang, Yang, Yuan, Zhang, Zhao, Zheng, Zheng, Zhukov, Zhukov, Zirin   +117 more
core   +1 more source

Characteristics of magnetoacoustic sausage modes [PDF]

, 2009
Aims: We perform an advanced study of the fast magnetoacoustic sausage oscillations of coronal loops in the context of MHD coronal seismology to establish the dependence of the sausage mode period and cut-off wavenumber on the plasma-$\beta$ of the loop ...
Brady, Christopher S., Inglis, Andrew R., Nakariakov, V. M. (Valery M.), Van Doorsselaere, Tom   +3 more
core   +2 more sources

Nowcasting Solar Energetic Particle Events for Mars Missions

Space Weather, Volume 23, Issue 4, April 2025.
Abstract In addition to the omnipresent Galactic Cosmic Rays, sudden Solar Energetic Particle (SEP) events present considerable health hazards for manned space missions. These events not only contribute to an increased long‐term cancer risk, but can, in extreme cases, cause acute radiation syndromes.
Jan Leo Löwe, Salman Khaksarighiri, Robert F. Wimmer‐Schweingruber, Donald M. Hassler, Bent Ehresmann, Jingnan Guo, Günther Reitz, Thomas Berger, Daniel Matthiä, Cary Zeitlin, Sven Löffler   +10 more
wiley   +1 more source

Coronal Seismology and the Propagation of Acoustic Waves Along Coronal Loops

, 2004
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 dissipation of ...
De Moortel, I., Klimchuk, J. A., Tanner, S. E. M.   +2 more
core   +2 more sources

NEUVAC: Nonlinear Extreme Ultraviolet Irradiance Model for Aeronomic Calculations

Space Weather, Volume 22, Issue 12, December 2024.
Abstract The need for reliable estimates of solar extreme ultraviolet (EUV) for operational space weather nowcasting and forecasting has motivated the development of new model of solar irradiance variability in 59 wavelength bins between 1 and 1,750 Å.
Daniel A. Brandt, Aaron J. Ridley
wiley   +1 more source

Spatial Damping of Propagating Kink Waves Due to Resonant Absorption: Effect of Background Flow

, 2011
Observations show the ubiquitous presence of propagating magnetohydrodynamic (MHD) kink waves in the solar atmosphere. Waves and flows are often observed simultaneously.
Goossens, Marcel, Soler, Roberto, Terradas, Jaume   +2 more
core   +1 more source

Multi-modal MHD oscillations in the solar corona, and their use in coronal seismology [PDF]

The solar atmosphere is a dynamic, inhomogeneous environment which acts as a natural plasma laboratory for a keen community of observers and researchers at the forefront of modern physics. Colossal plasma non-uniformities on the Sun are seen to host a wide variety of magnetoacoustic oscillatory motions, which may be used as probes into the local plasma
openaire   +1 more source