Results 21 to 30 of about 1,260 (214)
Gravitational helioseismology? [PDF]
Physical Review D, 1996 The magnitudes of the external gravitational perturbations associated with the normal modes of the Sun are evaluated to determine whether these solar oscillations could be observed with the proposed Laser Interferometer Space Antenna (LISA), a network of satellites designed to detect gravitational radiation.
Cutler, Curt, Lindblom, Lee
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Radial gradient of the solar rotation rate in the near-surface shear layer of the Sun
Frontiers in Astronomy and Space Sciences, 2022 We study the radial gradient of the solar rotation rate in the near-surface shear layer (NSSL) from about .950 R⊙ to the solar surface and its variation during Solar Cycles 23 and 24 with ring-diagram analysis applied to Global Oscillation Network Group (
Rudolf Komm
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Equatorially trapped Rossby waves in radiative stars
Astronomische Nachrichten, Volume 344, Issue 10, December 2023., 2023 Abstract Observations by recent space missions reported the detection of Rossby waves (r‐modes) in light curves of many stars (mostly A, B, and F spectral types) with outer radiative envelope. This article aims to study the theoretical dynamics of Rossby‐type waves in such stars. Hydrodynamic equations in a rotating frame were split into horizontal and
Mariam Albekioni +4 more
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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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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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Space Weather, Volume 20, Issue 3, March 2022., 2022 Abstract In the past decade, significant efforts have been made in developing physics‐based solar wind and coronal mass ejection (CME) models, which have been or are being transferred to national centers (e.g., SWPC, Community Coordinated Modeling Center) to enable space weather predictive capability.
Meng Jin +2 more
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The future of Genesis science. [PDF]
Meteorit Planet Sci, 2019 Abstract Solar abundances are important to planetary science since the prevalent model assumes that the composition of the solar photosphere is that of the solar nebula from which planetary materials formed. Thus, solar abundances are a baseline for planetary science.
Burnett DS, Jurewicz AJG, Woolum DS.
europepmc +2 more sources
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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