Results 51 to 60 of about 6,507 (247)

A Spectral Solver for Solar Inertial Waves

The Astrophysical Journal Supplement Series, 2023
Inertial waves, which are predominantly driven by the Coriolis force, likely play an important role in solar dynamics, and, additionally, they provide a window into the solar subsurface.
Jishnu Bhattacharya, Shravan M. Hanasoge
doaj   +1 more source

Imaging the Solar Tachocline by Time-Distance Helioseismology

, 2009
The solar tachocline at the bottom of the convection zone is an important region for the dynamics of the Sun and the solar dynamo. In this region, the sound speed inferred by global helioseismology exhibits a bump of approximately 0.4% relative to the ...
A. G. Kosovichev, Basu, Bensen, Charbonneau, Couvidat, Dikpati, Duvall, Georgobiani, Hartlep, Hartlep, Junwei Zhao, Korzennik, Kosovichev, Kosovichev, Kosovichev, N. N. Mansour, Schou, Spiegel, Thomas Hartlep, Zhao, Zhao, Zhao   +21 more
core   +1 more source

Ghost Images in Helioseismic Holography? Toy Models in a Uniform Medium [PDF]

, 2018
Helioseismic holography is a powerful technique used to probe the solar interior based on estimations of the 3D wavefield. Porter--Bojarski holography, which is a well-established method used in acoustics to recover sources and scatterers in 3D, is also ...
Yang, Dan
core   +2 more sources

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

The Solar Orbiter mission and its prospects for helioseismology

, 2007
Solar Orbiter is intended to become ESA's next solar mission in heritage of the successful SOHO project. The scientific objectives of the mission, its design, and its scientific payload are reviewed.
Berdyugina, Birch, Christensen-Dalsgaard, Christensen-Dalsgaard, Corbard, Dikpati, Duvall, Gilman, Gizon, Henney, Howe, Rempel, Ruzmaikin, Schatten, Schou, Schou, Schou, Ye   +17 more
core   +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

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

Solar Dynamics, Rotation, Convection and Overshoot

, 2015
We discuss recent observational, theoretical and modeling progress made in understanding the Sun's internal dynamics, including its rotation, meridional flow, convection and overshoot.
Hanasoge, S., Miesch, M. S., Roth, M., Schou, J., Schuessler, M., Thompson, M. J.   +5 more
core   +1 more source

Constructing and Characterising Solar Structure Models for Computational Helioseismology [PDF]

, 2011
In this paper, we construct background solar models that are stable against convection, by modifying the vertical pressure gradient of Model S (Christensen-Dalsgaard et al., 1996, Science, 272, 1286) relinquishing hydrostatic equilibrium.
A.C. Birch, A.M. Title, D. Lynden-Bell, F.A. Dahlen, H. Moradi, H. Schunker, H. Schunker, H.M. Antia, J. Christensen-Dalsgaard, J.H.M.J. Bruls, K.V. Parchevsky, L. Gizon, L. Gizon, L. Gizon, L. Gizon, M.C. Rabello-Soares, P.H. Scherrer, P.S. Cally, R. Cameron, R. Cameron, R. Cameron, R. H. Cameron, R. Nigam, S. Shelyag, S.M. Hanasoge, S.M. Hanasoge, T.L. Duvall Jr.   +26 more
core   +2 more sources

Stellar Physics and General Relativity

Astronomische Nachrichten, Volume 346, Issue 3-4, March-May 2025.
ABSTRACT The general theory of relativity is currently established as the most precise theory of gravity supported by observations, and its application is diverse ranging from astronomy to cosmology, while its application to astrophysics has been restricted only to compact stars due to the assumption that the Newtonian approximation is sufficient for ...
Shuichi Yokoyama
wiley   +1 more source