Results 11 to 20 of about 1,537 (202)
Data Compression for Helioseismology [PDF]
, 2022 Efficient data compression will play an important role for several upcoming and planned space missions involving helioseismology, such as Solar Orbiter. Solar Orbiter, to be launched in October 2018, will be the next space mission involving helioseismology. The main characteristic of Solar Orbiter lies in its orbit. The spacecraft will have an inclined
Löptien, Björn +4 more
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Helioseismology and solar abundances [PDF]
Physics Reports, 2008 To appear in Physics Reports.
Basu, Sarbani, Antia, H. M.
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Recent Developments in Local Helioseismology [PDF]
Solar Physics, 2008 Local helioseismology is providing new views of subphotospheric flows from supergranulation to global-scale meridional circulation and for studying structures and dynamics in the quiet Sun and active regions. In this short review we focus on recent developments, and in particular on a number of current issues, including the sensitivity of different ...
Thompson, M.J., Zharkov, S.
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Helioseismology with PICARD [PDF]
Journal of Physics: Conference Series, 2013 PICARD is a CNES micro-satellite launched in June 2010 (Thuillier at al. 2006). Its main goal is to measure the solar shape, total and spectral irradiance during the ascending phase of the activity cycle. The SODISM telescope onboard PICARD also allows us to conduct a program for helioseismology in intensity at 535.7 nm (Corbard et al. 2008).
Corbard, Thierry +12 more
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The future of helioseismology [PDF]
Proceedings of the International Astronomical Union, 2009 AbstractHelioseismology has provided us with the unique knowledge of the interior structure and dynamics of the Sun, and the variations with the solar cycle. However, the basic mechanisms of solar magnetic activity, formation of sunspots and active regions are still unknown.
Alexander G. Kosovichev
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Journal of Geophysical Research: Space Physics, Volume 128, Issue 12, December 2023., 2023 Abstract We propose a fully automated system to detect, aggregate, and classify sunspot groups according to the McIntosh scheme using ground‐based white light (WL) observations from the USET facility located at the Royal Observatory of Belgium. The sunspot detection uses a Convolutional Neural Network (CNN), trained from segmentation maps obtained with
Niels Sayez +4 more
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Frontiers in Astronomy and Space Sciences, 2023 We have on hand some 25 years of nearly uninterrupted high-quality and high-cadence global helioseismic data. The Global Oscillations Network Group (GONG) project has been producing science quality data since 1995, the Michelson Doppler Imager (MDI ...
Sylvain G. Korzennik
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Thermodynamic and transport properties of plasmas: Low‐density benchmarks
Contributions to Plasma Physics, Volume 63, Issue 9-10, October-November 2023., 2023 Abstract Physical properties of plasmas, such as equations of state (EoS) and transport coefficients, are expressed in terms of correlation functions, which can be calculated using various approaches (analytical theory and numerical simulations). The method of Green's functions provides benchmark values for these properties in the low‐density limit ...
G. Röpke
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Helioseismology in the Future [PDF]
International Astronomical Union Colloquium, 1983 AbstractWe review the observables of helioseismology that can contribute to our knowledge of the physical conditions in the solar interior. We discuss the limitations which presently prevent helioseismology from reaching its ultimate goal. We finally present a list of projects which either are already underway or that are planned for the near future ...
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SANS: Publicly Available Daily Multi‐Scale Seismic Ambient Noise Source Maps
Journal of Geophysical Research: Solid Earth, Volume 128, Issue 1, January 2023., 2023 Abstract Seismic ambient noise sources have received increased attention recently, creating new possibilities to study the Earth's subsurface and the atmosphere‐ocean‐solid Earth coupling. In efforts to locate such noise sources using nonlinear finite‐frequency inversions, methodological developments such as pre‐computed wavefields and spatially ...
Jonas K. H. Igel +2 more
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