Results 41 to 50 of about 6,507 (247)

The Current State-Of-The-Art In Active Region Seismology [PDF]

, 2012
Helioseismology is the study of the variations in the internal structure and properties of the dynamics of the Sun from measurements of its surface oscillations.
Moradi, Hamed
core   +1 more source

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

AGU 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

HELAS Local Helioseismology Activities [PDF]

Communications in Asteroseismology, 2009
The main goals of the HELAS local helioseismology network activity are to consolidate this field of research in Europe, to organise scientific workshops, and to facilitate the distribution of observations and data analysis software. Most of this is currently accomplished via a dedicated website at http://www.mps.mpg.de/projects/seismo/NA4/ .
Schunker, H., Gizon, L.
openaire   +4 more sources

Global‐Scale Full‐Waveform Ambient Noise Inversion

Journal 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, Christian Boehm, Laura Ermert, Lion Krischer, Andreas Fichtner   +4 more
wiley   +1 more source

Helioseismology in a bottle: modal acoustic velocimetry

New 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, Daniel S Zimmerman, Henri-Claude Nataf, Aurélien Thorette, Vedran Lekic, Daniel P Lathrop   +5 more
doaj   +1 more source

Progress in sunspot helioseismology

Journal of Physics: Conference Series, 2011
Local helioseismology is a set of methods that are used to study wave propagation and infer physical conditions in the solar interior. Sunspots are a particularly challenging target for local helioseismology. In this review, I will show that some new methods (magnetoconvection simulations and numerical wave propagation simulations) lead to shallow ...
A. C. Birch
openalex   +2 more sources

Inversions of Stellar Structure From Asteroseismic Data

Frontiers in Astronomy and Space Sciences, 2022
The advent of space-based photometry missions in the early 21st century enabled the application to asteroseismic data of advanced inference techniques until then restricted to the field of helioseismology.
Gaël Buldgen, Jérôme Bétrisey, Ian W. Roxburgh, Ian W. Roxburgh, Sergei V. Vorontsov, Sergei V. Vorontsov, Daniel R. Reese   +6 more
doaj   +1 more source

Solar opacity, neutrino signals and helioseismology [PDF]

, 1996
In connection with the recent suggestion by Tsytovich et al. that opacity in the solar core could be overestimated, we consider the following questions: i) What would a 10\% opacity reduction imply for the solar neutrino puzzle?
Abdurashitiv, Anselmann, B. Ricci, Bahcall, Bahcall, Bahcall, Bahcall, Bahcall, Basu, Berezinsky, Castellani, Castellani, Christensen-Dalsgaard, Christensen-Dalsgaard, Cleveland, Cox, Dappen, Dappen, Dar, Degl'Innocenti, Dziembowski, Dziembowski, Grevesse, Guzik, Hernandez, Kajita, Proffitt, Richard, Roger, Rogers, Rogers, Tsytovich, Turck-Chièze, Turck-Chièze, Vorontsov   +34 more
core   +3 more sources

Helioseismology and Beryllium neutrinos [PDF]

Physics Letters B, 1999
We derive a lower limit on the Beryllium neutrino flux on earth, $ (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. We emphasize that this abundance is
Ricci B, VILLANTE, FRANCESCO LORENZO, Lissia M.   +2 more
openaire   +4 more sources

Global seismology of the Sun

Living 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