Results 1 to 10 of about 5,460 (133)
New Solar Metallicity Measurements
Atoms, 2019 In the past years, a systematic downward revision of the metallicity of the Sun has led to the “solar modeling problem„, namely the disagreement between predictions of standard solar models and inferences from helioseismology.
Sunny Vagnozzi
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Seismology of active regions: Current status and perspectives
Frontiers in Astronomy and Space Sciences, 2023 The goal of helioseismology is to provide accurate information about the Sun’s interior from the observations of the wave field at its surface. In the last three decades, both global and local helioseismology studies have made significant advances and ...
Sushanta Tripathy
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Sub-surface plasma flows and the flare productivity of solar active regions
Frontiers in Astronomy and Space Sciences, 2022 The extreme space weather conditions resulting from high energetic events likes solar flares and Coronal Mass Ejections demand for reliable space weather forecasting.
B. Lekshmi +5 more
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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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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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Effects of localized horizontal flow patterns on eigenfrequencies of stellar global modes [PDF]
Serbian Astronomical Journal, 2005 The main goal of this paper is to estimate the significance of effects the flow profile U0(z) induces on computed global oscillation spectra. We solve numerically the eigenvalue problem for the described basic state configuration with reference to solar ...
Čadež V.M., Vanlommel P.
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Frontiers in Astronomy and Space Sciences, 2019 Since the first observations of solar oscillations in 1960, helioseismology has probably been one of the most successful fields of astrophysics.
Gaël Buldgen +4 more
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The Astrophysical Journal, 2023 In this paper, we refine a previously developed acoustic source filter, improving its reliability and extending its capabilities. We demonstrate how to fine-tune the filter to meet observational constraints and focus on specific wave-front speeds.
Shah Mohammad Bahauddin, Mark Peter Rast
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Deciphering Solar Magnetic Activity: On Grand Minima in Solar Activity
Frontiers in Astronomy and Space Sciences, 2015 The Sun provides the energy necessary to sustain our existence. While the Sun provides for us, it is also capable of taking away. The weather and climatic scales of solar evolution and the Sun-Earth connection are not well understood.
Scott William Mcintosh, Robert J Leamon
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Purely Gain-Coupled Distributed-Feedback Bragg Semiconductor Laser Diode Emitting at 770 nm
Applied Sciences, 2021 The transition lines of Mg, K, Fe, Ni, and other atoms lie near 770 nm, therefore, this spectral region is important for helioseismology, solar atmospheric studies, the pumping of atomic clocks, and laser gyroscopes.
Chunkao Ruan +9 more
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