Results 81 to 90 of about 1,264 (214)
Helioseismology: Observations and space missions [PDF]
, 2015 Chapter 2 of the book Extraterrestrial Seismology, 16 pages, 5 figures; doi:10.1017/CBO9781107300668 ...
P. L. Pallé +3 more
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Persistent Near-Surface Flow Structures from Local Helioseismology [PDF]
, 2015 Near-surface flows measured by the ring-diagram technique of local helioseismology show structures that persist over multiple rotations. We examine these phenomena using data from the Global Oscillation Network Group (GONG) and the Helioseismic and ...
Komm, R. W. +15 more
core +1 more source
A Broad Set of Solar and Cosmochemical Data Indicates High C-N-O Abundances for the Solar System
The Astrophysical JournalWe examine the role of refractory organics as a major C carrier in the outer protosolar nebula and its implications for the compositions of large Kuiper Belt objects (KBOs) and CI chondrites.
Ngoc Truong +2 more
doaj +1 more source
, 1992 The observed deficit of $\rm ^8B$ solar neutrinos may call for an improved standard model of the sun or an expanded standard model of particle physics ({\it e.g.,} with neutrino masses and mixing). In the former case, contemporary fluid motions and thermal fluctuations in the sun's core may modify nuclear reaction rates and restore agreement.
De Rújula, A., Glashow, S. L.
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Helioseismology – from oscillations toward the internal structure [PDF]
, 2009 Solar oscillations make it possible to construct a detailed model od the Sun and to map details of the solar interior.
Švanda, Michal
core
Full Waveform Inversion for Time-Distance Helioseismology [PDF]
, 2014 Inferring interior properties of the Sun from photospheric measurements of the seismic wavefield constitutes the helioseismic inverse problem. Deviations in seismic measurements (such as wave travel times) from their fiducial values estimated for a given
Tromp, J. +3 more
core +1 more source
Time-dependence of Subsurface Solar Convection Using the Time–Distance Deep-focus Method
The Astrophysical JournalWe reexamine the deep-focus methodology of time–distance helioseismology previously used to estimate the power spectrum of the solar convection at a depth of about 30 Mm, which was found to be significantly weaker than predicted by theory and simulations.
John T. Stefan +3 more
doaj +1 more source
Bulletin de la Société Royale des Sciences de Liège, 2020 Helioseismology is one of the most successful fields of astrophysics. The observation and character-ization of solar oscillation has allowed solar seismologists to study the internal structure and dynamics of the Sun with unprecedented thoroughness. Ground-based networks and dedicated space missions have delivered data of exquisite quality, enabling ...
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Helioseismic Signature of Parker Fragmentation of Magnetic Flux beneath Sunspot Photospheres
The Astrophysical Journal LettersStandard local helioseismic diagnostics of large sunspots show the signature of anomalously strong compact scatterers of p -modes within about 1 Mm beneath their photospheres.
Elena G. Broock +3 more
doaj +1 more source
A mixed solar core, solar neutrinos and helioseismology [PDF]
, 1998 We consider a wide class of solar models with mixed core. Most of these models can be excluded as the sound speed profile that they predict is in sharp disagreement with helioseismic constraints.
S. DEGL'INNOCENTI +3 more
core +1 more source