Results 91 to 100 of about 1,264 (214)

Helioseismology - a clear view of the interior [PDF]

, 2011
Helioseismology is a very powerful tool that allows us to explore the interior of the Sun. Here we give particular emphasis to the justification for the likely location of the zone that is most sensitive to cycle-related changes. For the low degree modes
Chaplin, William, Elsworth, Yvonne, Broomhall, Anne-marie   +2 more
core   +1 more source

A Core-sensitive Mixed f/g-mode of the Sun Predicted by Wave Topology and Hydrodynamical Simulation

The Astrophysical Journal Letters
Helioseismology has revolutionized our understanding of the Sun by analyzing its global oscillation modes. However, the solar core remains elusive, limiting a full understanding of its evolution.
Arthur Le Saux, Armand Leclerc, Guillaume Laibe, Pierre Delplace, Antoine Venaille   +4 more
doaj   +1 more source

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, Saba, J. L. R., Bush, R. I., A. G. Kosovichev, Bogart, R. S., Schou, J., R. S. Bogart, C. De Forest, Kosovichev, A. G., Milford, P. N., C. J. Wolfson, Wolfson, C. J., A. M. Title, Hoeksema, J. T., T. D. Tarbell, Title, A. M., DeForest, C., J. L. R. Saba, Duvall, T. L., Jr., Scherrer, P. H., J. Schou, Tarbell, T. D., P. N. Milford, P. H. Scherrer, R. I. Bush, J. T. Hoeksema   +25 more
core   +2 more sources

Editorial: The Future of Asteroseismology

Frontiers in Astronomy and Space Sciences, 2021
Joyce Ann Guzik, Markus Roth
doaj   +1 more source

Stray Light Correction for the Helioseismic and Magnetic Imager

The Astrophysical Journal Supplement Series
We report a point-spread function (PSF) and deconvolution procedure to remove stray light from the Helioseismic and Magnetic Imager (HMI) data. Prelaunch calibration observations, postlaunch Venus transit, and lunar transit data were used to develop the ...
A. A. Norton, T. L. Duvall Jr., J. Schou, R. S. Bogart, Junwei Zhao, M. C. Rabello-Soares, P. J. Levens, J. T. Hoeksema, C. S. Baldner   +8 more
doaj   +1 more source

Helioseismology and Asteroseismology: Looking for Gravitational Waves in Acoustic Oscillations [PDF]

, 2014
International audienceCurrent helioseismology observations allow the determination of the frequencies and surface velocity amplitudes of solar acoustic modes with exceptionally high precision. In some cases, the frequency accuracy is better than one part
Lopes, Ilídio, Silk, Joseph
core   +1 more source

Time-Distance Helioseismology With The Mdi Instrument: Initial Results [PDF]

, 2007
. 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 ...
T. D. Tarbell, T. L. Duvall, J. L. R. Saba, Jr., A. G. Kosovichev, R. S. Bogart, J. Schou, C. De Forest, P. H. Scherrer, C. J. Wolfson, A. M. Title, R. I. Bush, J. T. Hoeksema   +12 more
core  

Investigating the role of opacity in reconciling the Standard Solar Model and Helioseismology [PDF]

, 2023
openOver the last 20 years, advances in determining the chemical composition of the Sun have adversely affected the agreement between Standard Solar Models (SSMs) and helioseismology, to the point where SSMs can no longer be made to agree with ...
MANTOVANI, DANIELE
core  

New Solar Metallicity Measurements

Atoms, 2019
In the past years, a systematic downward revision of the metallicity of the Sun has led to the “solar modeling problem„, namely the disagreement between predictions of standard solar models and inferences from helioseismology.
Sunny Vagnozzi
doaj   +1 more source

Constraint on Light Dipole Dark Matter from Helioseismology [PDF]

, 2014
International audienceWe investigate the effects of a magnetic dipole moment of asymmetric dark matter (DM) in the evolution of the Sun. The dipole interaction can lead to a sizable DM scattering cross section even for light DM, and asymmetric DM can ...
Lopes, Ilídio, Kadota, Kenji, Silk, Joseph   +2 more
core   +1 more source