Results 51 to 60 of about 1,260 (214)

Photospheric high-frequency acoustic power excess in sunspot umbra: signature of magneto-acoustic modes [PDF]

, 2013
We present observational evidence for the presence of MHD (magnetohydrodynamic) waves in the solar photosphere deduced from SOHO/MDI (Solar and Heliospheric Observatory/Michelson Doppler Imager) Dopplergram velocity observations.
Shelyag, S., Thompson, Michael John, Zharkov, Sergei, Zharkov, S., M. J. Thompson, Fedun, V., S. Zharkov, Shelyag, Sergiy, Erdélyi, Robert, R. Erdélyi, Erdelyi, R., S. Shelyag, V. Fedun, Fedun, Viktor, Thompson, M.J.   +14 more
core   +1 more source

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

Helioseismology with Solar Orbiter

, 2014
The Solar Orbiter mission, to be launched in July 2017, will carry a suite of remote sensing and in-situ instruments, including the Polarimetric and Helioseismic Imager (PHI).
Appourchaux, Thierry, Gizon, Laurent, Schou, Jesper, Löptien, Björn, Hill, Frank, Hirzberger, Johann, Birch, Aaron C., Blanco Rodríguez, Julián, Dominguez-Tagle, Carlos, Solanki, Sami K., Cally, Paul S., Scherrer, Philip H., Gandorfer, Achim   +12 more
core   +1 more source

Image compression in local helioseismology

, 2014
Context. Several upcoming helioseismology space missions are very limited in telemetry and will have to perform extensive data compression. This requires the development of new methods of data compression. Aims.
Gizon, Laurent, J. Schou, B. Löptien, A. C. Birch, L. Gizon, Birch, Aaron C., Birch, A., Gizon, L., Schou, J., Löptien, B., Löptien, Björn   +10 more
core   +1 more source

One-sided arc averaging geometries in time–distance local helioseismology [PDF]

, 2021
Context. The study of solar oscillations (helioseismology) has been a very successful method of researching the Sun. Helioseismology teaches us about the structure and mean properties of the Sun.
Michal Švanda, Korda, David, David Korda, Svanda, Michal, Thierry Roudier, Roudier, Thierry   +5 more
core   +1 more source

Helioseismology and screening of nuclear reactions in the Sun

, 2001
Helioseismology and screening of nuclear reactions in the ...
VILLANTE, Francesco Lorenzo, FIORENTINI, Giovanni, RICCI, Barbara   +2 more
core   +2 more sources

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

Local Helioseismology Analyses with Hinode/SOT Datasets

, 2018
The solar internal structure and dynamics have been probed by examining the oscillations of the Sun, or by “listening to the Sun”; helioseismology provides us with unique tools for these analyses.
Nagashima, K., Kaori Nagashima
core   +1 more source

Ryugu reference project: Recommendations from the measurement definition team

Meteoritics &Planetary Science, Volume 61, Issue 5, Page 819-848, May 2026.
Abstract Sample return missions play a significant role in planetary science by providing pristine extraterrestrial materials. JAXA's Hayabusa2 and NASA's OSIRIS‐REx missions have returned samples from the C‐type asteroids Ryugu and Bennu, respectively. The chemical and mineralogical compositions of these samples closely resemble those of CI chondrites,
Tetsuya Yokoyama, Guillaume Avice, Henner Busemann, Nicolas Dauphas, Daniel P. Glavin, Ashley J. King, Thorsten Kleine, Katharina Lodders, Frederic Moynier, Maria Schönbächler, Yoshinori Takano, Kun Wang, Hikaru Yabuta, Yuma Enokido, Ryota Fukai, Shogo Tachibana, Tomohiro Usui   +16 more
wiley   +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
openaire   +2 more sources