Results 71 to 80 of about 1,740 (142)

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

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

Preface to the special issue on “Old records for new knowledge”

Geoscience Data Journal, Volume 11, Issue 4, Page 357-364, October 2024.
Studying a changing world requires observations going back in time to extend and contextualize our latest scientific knowledge. Old legacy data exist in non‐digital formats. Thus, techniques and methodologies for the preservation, dissemination, interpretation, homogenization, calibration, and use of such legacy data and their associated metadata, as ...
Josep Batlló, Hisashi Hayakawa, Victoria Slonosky, Richard I. Crouthamel   +3 more
wiley   +1 more source

Coronal Waves and Oscillations

Living Reviews in Solar Physics, 2005
Wave and oscillatory activity of the solar corona is confidently observed with modern imaging and spectral instruments in the visible light, EUV, X-ray and radio bands, and interpreted in terms of magnetohydrodynamic (MHD) wave theory.
Nakariakov Valery M., Verwichte Erwin
doaj  

Global Coronal Magnetic Field Estimation Using Bayesian Inference

The Astrophysical Journal
Estimating the magnetic field strength in the solar corona is crucial for understanding different physical processes happening over diverse spatiotemporal scales.
Upasna Baweja, Vaibhav Pant, Iñigo Arregui   +2 more
doaj   +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

Evaluate the Impact of Regional Ionospheric Data Assimilation Model on Precise Point Positioning

Space Weather, Volume 22, Issue 8, August 2024.
Abstract This study presents an innovative approach to improving the accuracy and reducing the error convergence time of static Precise Point Positioning (PPP) in Global Positioning System (GPS) navigation. The research focuses on the impact of the high spatial and temporal resolution of a regional ionospheric data assimilation model on PPP over Taiwan.
Yan‐Shen Chen, Chia‐Hung Chen, Ming Yang, Feng‐Yu Chu   +3 more
wiley   +1 more source

Forward Modelling of Standing Slow Modes in Flaring Coronal Loops

, 2015
Standing slow mode waves in hot flaring loops are exclusively observed in spectrometers and are used to diagnose the magnetic field strength and temperature of the loop structure.
Antolin, P., Banerjee, D., Van Doorsselaere, T., Yuan, D.   +3 more
core   +2 more sources

Inner Radiation Belt Simulations During the Successive Geomagnetic Storm Event of February 2022

Space Weather, Volume 22, Issue 7, July 2024.
Abstract Starting from 29 January 2022, a series of solar eruptions triggered a moderate geomagnetic storm on 3 February 2022, followed subsequently by another. Despite the typically minimal impact of unintense storms on space technology, 38 out of the 49 Starlink satellites underwent orbital decay, re‐entering Earth's atmosphere.
Kirolosse M. Girgis, Tohru Hada, Akimasa Yoshikawa, Shuichi Matsukiyo, Abraham C.‐L. Chian, Ezequiel Echer   +5 more
wiley   +1 more source

Non-axisymmetric oscillations of stratified coronal magnetic loops with elliptical cross-sections

, 2010
We study non-axisymmetric oscillations of a straight magnetic tube with an elliptic cross-section and density varying along the tube. The governing equations for kink and fluting modes in the thin tube approximation are derived.
Andries, Andries, Aschwanden, Banerjee, Dymova, Dymova, Erdélyi, López Fuentes, M. S. Ruderman, Morton, Morton, Nakariakov, Nakariakov, R. J. Morton, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Ruderman, Tomczyk, Verth, Verwichte   +22 more
core   +1 more source