Results 71 to 80 of about 1,264 (214)
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
openaire +1 more source
Probing sunspots with two-skip time–distance helioseismology [PDF]
, 2018 Context. Previous helioseismology of sunspots has been sensitive to both the structural and magnetic aspects of sunspot structure.Aims. We aim to develop a technique that is insensitive to the magnetic component so the two aspects can be more readily ...
Gizon, Laurent +17 more
core +1 more source
The Astrophysical Journal, 2023 Using time–distance local helioseismology flow maps within 1 Mm of the solar photosphere, we detect inflows toward activity belts that contribute to solar-cycle scale variations in the near-surface meridional flow. These inflows stretch out as far as 30°
Sushant S. Mahajan +2 more
doaj +1 more source
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 ...
openaire +3 more sources
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
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
The Astrophysical JournalThe ubiquitous 5 minute solar p -mode oscillations, excited at the photosphere, play a crucial role in driving various coronal instabilities and mediating upward energy transport. These modes are strongly influenced by nonthermal electron populations. To
Souvik Das, Pralay Kumar Karmakar
doaj +1 more source
Global-scale consequences of magnetic-helicity injection and condensation on the sun [PDF]
, 2014 In the recent paper of Antiochos, a new concept for the injection of magnetic helicity into the solar corona by small-scale convective motions and its condensation onto polarity inversion lines (PILs) was been developed.
DeVore, Rick +2 more
core +1 more source
Observed Power and Frequency Variations of Solar Rossby Waves with Solar Cycles
The Astrophysical Journal Letters, 2023 Several recent studies utilizing different helioseismic methods have confirmed the presence of large-scale vorticity waves known as solar Rossby waves within the Sun.
M. Waidele, Junwei Zhao
doaj +1 more source
Investigating Variations in Solar Differential Rotation by Helioseismology
The Astrophysical JournalHelioseismic signatures of dynamo waves have recently been discovered in variations of the solar differential rotation, offering valuable insights into the type of dynamo mechanism operating in the solar convection zone. To characterize these variations,
Krishnendu Mandal +3 more
doaj +1 more source