Results 41 to 50 of about 1,260 (214)

Purely Gain-Coupled Distributed-Feedback Bragg Semiconductor Laser Diode Emitting at 770 nm

open access: yesApplied 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
doaj   +1 more source

Differential Rotation in Convecting Spherical Shells with Non-Uniform Viscosity and Entropy Diffusivity

open access: yesFluids, 2023
Contemporary three-dimensional physics-based simulations of the solar convection zone disagree with observations. They feature differential rotation substantially different from the true rotation inferred by solar helioseismology and exhibit a conveyor ...
Parag Gupta   +2 more
doaj   +1 more source

An Iterative OLA Method for Inversion of Solar Spectropolarimetric Data. I. Single- and Multiple-variable Inversions of Thermodynamic Quantities

open access: yesThe Astrophysical Journal, 2023
This paper describes an adaptation of the Optimally Localized Averaging (OLA) inversion technique, originally developed for geo- and helioseismological applications, to the interpretation of solar spectroscopic data.
Piyush Agrawal   +2 more
doaj   +1 more source

Saturn's Rings as a Seismograph to Probe Saturn's Internal Structure

open access: yesAGU Advances, Volume 1, Issue 2, June 2020., 2020
As it has already done for Earth, the Sun, and the stars, seismology has the potential to radically change the way the interiors of giant planets are studied. In a sequence of events foreseen by only a few, observations of Saturn's rings by the Cassini spacecraft have rapidly broken ground on giant planet seismology. Gravity directly couples the planet'
Christopher R. Mankovich
wiley   +1 more source

Helioseismology in a bottle: modal acoustic velocimetry

open access: yesNew Journal of Physics, 2014
Measurement of the differential rotation of the Sunʼs interior is one of the great achievements of helioseismology, providing important constraints for stellar physics. The technique relies on observing and analyzing rotationally-induced splittings of p -
Santiago Andrés Triana   +5 more
doaj   +1 more source

Global‐Scale Full‐Waveform Ambient Noise Inversion

open access: yesJournal of Geophysical Research: Solid Earth, Volume 125, Issue 4, April 2020., 2020
Abstract We present the first application of full‐waveform ambient noise inversion to observed correlation functions that jointly constrains 3‐D Earth structure and heterogeneous noise sources. For this, we model and interpret ambient noise correlations as recordings of correlation wavefields, which completely eliminates the limiting assumptions of ...
Korbinian Sager   +4 more
wiley   +1 more source

Helioseismology [PDF]

open access: yes, 1988
Many of the oscillations observed at the solar surface have been identified with resonant normal modes of the entire solar body. Accurate measurements of frequencies' of these modes enable us to study the internal structure and dynamics of the Sun ...
Antia, H. M.
core   +1 more source

Helioseismology and solar neutrinos: an update

open access: yes, 2001
We review recent advances concerning helioseismology, solar models and solar neutrinos. Particularly we address the following points: i) helioseismic tests of recent SSMs; ii) predictions of the Beryllium neutrino flux based on helioseismology; iii ...
VILLANTE, FRANCESCO LORENZO   +2 more
core   +2 more sources

Global seismology of the Sun

open access: yesLiving Reviews in Solar Physics, 2016
The seismic study of the Sun and other stars offers a unique window into the interior of these stars. Thanks to helioseismology, we know the structure of the Sun to admirable precision. In fact, our knowledge is good enough to use the Sun as a laboratory.
Sarbani Basu
doaj   +1 more source

A Spectral Solver for Solar Inertial Waves

open access: yesThe Astrophysical Journal Supplement Series, 2023
Inertial waves, which are predominantly driven by the Coriolis force, likely play an important role in solar dynamics, and, additionally, they provide a window into the solar subsurface.
Jishnu Bhattacharya, Shravan M. Hanasoge
doaj   +1 more source

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