Results 71 to 80 of about 1,568 (212)
Observational Evidence of Shallow Origins for the Magnetic Fields of Solar Cycles
Frontiers in Astronomy and Space Sciences, 2018 Observational evidence for the origin of active region magnetic fields has been sought from published information on extended solar cycles, statistical distributions of active regions and ephemeral regions, helioseismology results, positional ...
Sara F. Martin
doaj +1 more source
Helioseismology: Probing the interior of a star [PDF]
Proceedings of the National Academy of Sciences, 1999 Helioseismology offers, for the first time, an opportunity to probe in detail the deep interior of a star (our Sun). The results will have a profound impact on our understanding not only of the solar interior, but also neutrino physics, stellar evolution theory, and stellar population studies in astrophysics.
P, Demarque, D B, Guenther
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Astrophysics and Space Sciences Transactions, 2008 Helioseismology, the study of solar oscillations, has proved to be an extremely powerful tool for the investigation of the internal structure and dynamics of the Sun. Here I will review the present status of helioseismic studies and comment on recent results and on prospects for future investigations to solve the most discussed open questions ...
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On the Technique of the Inversion of Helioseismological Data [PDF]
Symposium - International Astronomical Union, 1988 The asymptotic inversion technique is developed, including independent determination of the sound speed profile and frequency dependence of the effective phase shift. Numerical results are presented.
M.A. Brodsky, S. V. Vorontsov
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Helioseismology, Asteroseismology, and MHD Connections
, 2009 This volume presents a timely snapshot of the state of helio- and asteroseismology in the era when the SOHO/MDI instrument is about to be replaced by SDO/HMI and the CoRoT space mission is yielding its first long-duration light curves of thousands of ...
Gizon, Laurent +2 more
core +1 more source
Time-Distance Helioseismology [PDF]
, 2010 Time-distance helioseismology is a method of ambient noise imaging using the solar oscillations. The basic realization that led to time-distance helioseismology was that the temporal cross correlation of the signals at two 'surface' (or photospheric ...
Duvall, Thomas L., Jr.
core
Time-Distance Helioseismology with the MDI Instrument: Initial Results [PDF]
, 1997 In time-distance helioseismology, the travel time of acoustic waves is measured between various points on the solar surface. To some approximation, the waves can be considered to follow ray paths that depend only on a mean solar model, with the curvature
T. L. Duvall +25 more
core +1 more source
Solar Interior Rotation and its Variation
Living Reviews in Solar Physics, 2009 This article surveys the development of observational understanding of the interior rotation of the Sun and its temporal variation over approximately forty years, starting with the 1960s attempts to determine the solar core rotation from oblateness and ...
Howe Rachel
doaj
Reviews of Modern Physics, 2002 60 pages, 27 figures. Scheduled for publication in Rev. Mod. Phys., Oct. 2002. A larger gzipped postscript version, with higher-quality figures, is available at http://astro.ifa.au.dk/~jcd/papers/rmp01/text-13.ps ...
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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, Hannah, Gizon, Laurent
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