Results 31 to 40 of about 1,264 (214)

Image compression in local helioseismology [PDF]

open access: yes, 2014
Context. Several upcoming helioseismology space missions are very limited in telemetry and will have to perform extensive data compression. This requires the development of new methods of data compression. Aims.
Gizon, Laurent   +10 more
core   +1 more source

Helioseismology and screening of nuclear reactions in the Sun [PDF]

open access: yes, 2001
Helioseismology and screening of nuclear reactions in the ...
VILLANTE, Francesco Lorenzo   +2 more
core   +3 more sources

Helioseismology and Beryllium neutrinos [PDF]

open access: yesPhysics Letters B, 1999
We derive a lower limit on the Beryllium neutrino flux on earth, $Φ(Be)_{min} = 1\cdot 10^9 cm^{-2} s^{-1}$, in the absence of oscillations, by using helioseismic data, the B-neutrino flux measured by Superkamiokande and the hydrogen abundance at the solar center predicted by Standard Solar Model (SSM) calculations.
Ricci B   +2 more
openaire   +4 more sources

Local Helioseismology Analyses with Hinode/SOT Datasets [PDF]

open access: yes, 2018
The solar internal structure and dynamics have been probed by examining the oscillations of the Sun, or by “listening to the Sun”; helioseismology provides us with unique tools for these analyses.
Nagashima, K., Kaori Nagashima
core   +1 more source

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

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

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

Helioseismology, solar models and solar neutrinos [PDF]

open access: yes, 1999
We review recent advances concerning helioseismology, solar models and solar neutrinos. Particularly we shall address the following points: i) helioseismic tests of recent SSMs; ii)the accuracy of the helioseismic determination of the sound speed near ...
Fiorentini G.   +3 more
core   +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

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

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