Results 11 to 20 of about 1,264 (214)
Journal of Astrophysics and Astronomy, 2005 The sun being the nearest star, seismic observations with high spatial resolution are possible, thus providing accurate measurement of frequencies of about half million modes of solar oscillations covering a wide range of degree.
Antia, H. M.
core +5 more sources
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 +5 more
openaire +5 more sources
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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Space WeatherA demonstrated failure mode for operational solar flare forecasting is the inability to forecast flares that occur near, or just beyond, the solar limb.
K. D. Leka +5 more
doaj +2 more sources
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
openaire +6 more sources
The Phanerozoic climate. [PDF]
Ann N Y Acad Sci, 2023 We review the long‐term climate variations during the last 540 million years (Phanerozoic Eon). We first summarize the geological and geochemical datasets available for reconstruction of long‐term climate variations. We then explore the main drivers of climate that appear to explain a large fraction of these climatic oscillations. The first is the long‐
Shaviv NJ, Svensmark H, Veizer J.
europepmc +2 more sources
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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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
wiley +1 more source
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
wiley +1 more source
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
wiley +1 more source