Results 41 to 50 of about 5,529 (192)

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 neutrinos, helioseismology and the solar internal dynamics

, 2011
Neutrinos are fundamental particles ubiquitous in the Universe. Their properties remain elusive despite more than 50 years of intense research activity. In this review we remind the reader of the noticeable properties of these particles and of the stakes
Couvidat, S., Turck-Chieze, S.
core   +1 more source

Direct assessment of SDO/HMI helioseismology of active regions on the Sun’s far side using SO/PHI magnetograms

Astronomy & Astrophysics, 2023
Context. Earth-side observations of solar p modes can be used to image and monitor magnetic activity on the Sun’s far side. In this work, we use magnetograms of the far side obtained by the Polarimetric and Helioseismic Imager (PHI) on board Solar ...
Yang D., Gizon L., Barucq H., Hirzberger J., Orozco Suárez D., Albert K., Albelo Jorge N., Appourchaux T., Alvarez-Herrero A., Blanco Rodríguez J., Gandorfer A., Germerott D., Guerrero L., Gutierrez-Marques P., Kahil F., Kolleck M., Solanki S. K., del Toro Iniesta J. C., Volkmer R., Woch J., Pérez-Grande I., Sanchis Kilders E., Balaguer Jiménez M., Bellot Rubio L. R., Calchetti D., Carmona M., Deutsch W., Feller A., Fernandez-Rico G., Fernández-Medina A., García Parejo P., Gasent Blesa J. L., Grauf B., Heerlein K., Korpi-Lagg A., Lange T., López Jiménez A., Maue T., Meller R., Moreno Vacas A., Müller R., Nakai E., Schmidt W., Schou J., Schühle U., Sinjan J., Staub J., Strecker H., Torralbo I., Valori G.   +49 more
doaj   +1 more source

Local helioseismology and the active Sun

, 2010
The goal of local helioseismology is to elicit three-dimensional information about the sub-surface (or far-side) structure and dynamics of the Sun from observations of the helioseismic wave field at the surface.
Basu, Birch, Birch, Birch, Birch, Birch, Braun, Braun, Braun, Braun, Braun, Cally, Cally, Cally, Cally, Cameron, Cameron, Chang, Chou, Christensen-Dalsgaard, Crouch, Duvall, Duvall, Duvall, Finsterle, Gizon, Gizon, Gizon, Gizon, Gizon, Gizon, Gizon, González Hernández, González Hernández, Haber, Hanasoge, Hanasoge, Harvey, Hill, Hindman, Howe, Hung, Jackiewicz, Jackiewicz, Jacoutot, Khomenko, Khomenko, Komm, Komm, Komm, Kosovichev, Kuridze, Lindsey, Lindsey, Moradi, Pijpers, Rempel, Scherrer, Schou, Shelyag, Shelyag, Spruit, Spruit, Woodard, Zhao, Zhao   +65 more
core   +1 more source

High Resolution Helioseismic Imaging of Subsurface Structures and Flows of A Solar Active Region Observed by Hinode [PDF]

, 2009
We analyze a solar active region observed by the Hinode CaII H line using the time-distance helioseismology technique, and infer wave-speed perturbation structures and flow fields beneath the active region with a high spatial resolution.
Alexander G. Kosovichev, Carlsson, Couvidat, Couvidat, Gizon, Gizon, Hindman, Hindman, Hurlburt, Jensen, Junwei Zhao, Katsukawa, Kitiashvili, Komm, Kosovichev, Kosovichev, Lindsey, Lindsey, Nagashima, Parchevsky, Rajaguru, Schunker, Sekii, Takashi Sekii, Zhao, Zhao, Zhao, Zhao   +27 more
core   +1 more source

Nonzero Phase Shifts of Acoustic Waves in the Lower Solar Atmosphere Measured from Realistic Simulations and Their Role in Local Helioseismology

The Astrophysical Journal, 2023
Previous studies analyzing the evanescent nature of acoustic waves in the lower solar atmosphere, up to 300 km above the photosphere, have shown an unexpected phase shift of an order of 1 s between different heights.
M. Waidele, Junwei Zhao, I. N. Kitiashvili   +2 more
doaj   +1 more source

Pinsker estimators for local helioseismology

, 2016
A major goal of helioseismology is the three-dimensional reconstruction of the three velocity components of convective flows in the solar interior from sets of wave travel-time measurements.
Fournier, D., Gizon, L., Hohage, T., Holzke, M.   +3 more
core   +1 more source

Helioseismology, solar models and solar neutrinos [PDF]

, 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 ...
B. Ricci, Bahcall, Bahcall, Basu, Basu, Brun, Ciacio, Cleveland, Dar, Degl'Innocenti, Dziembowski, Elsworth, Fiorentini, G. Fiorentini, Harvey, Libbrecht, Pijpers, Rhodes, Ricci, Richard, Rolf, Schlattl, Turck-Chieze   +22 more
core   +2 more sources

Helioseismology

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 ...
openaire   +3 more sources

Reconstruction of Solar Subsurfaces by Local Helioseismology

, 2016
Local helioseismology has opened new frontiers in our quest for understanding of the internal dynamics and dynamo on the Sun. Local helioseismology reconstructs subsurface structures and flows by extracting coherent signals of acoustic waves traveling ...
A. C. Birch, A. C. Birch, A. C. Birch, A. C. Birch, A. C. Birch, A. C. Birch, A. G. Kosovichev, A. G. Kosovichev, A. G. Kosovichev, A. G. Kosovichev, A. G. Kosovichev, A. G. Kosovichev, A. G. Kosovichev, A. G. Kosovichev, B. Jacobsen, D. A. Haber, D. A. Haber, D. O. Gough, I. N. Kitiashvili, J. Reiter, J. Schou, J. Zhao, J. Zhao, J. Zhao, Junwei Zhao, K. V. Parchevsky, K. V. Parchevsky, L. Gizon, Michal Švanda, Michal Švanda, Michal Švanda, P. H. Scherrer, R. Howard, S. Couvidat, S. Godier, T. Hartlep, T. L. Duvall Jr, Y. Liu   +37 more
core   +1 more source