Results 51 to 60 of about 1,568 (212)

An Iterative OLA Method for Inversion of Solar Spectropolarimetric Data. I. Single- and Multiple-variable Inversions of Thermodynamic Quantities

open access: yesThe Astrophysical Journal, 2023
This paper describes an adaptation of the Optimally Localized Averaging (OLA) inversion technique, originally developed for geo- and helioseismological applications, to the interpretation of solar spectroscopic data.
Piyush Agrawal   +2 more
doaj   +1 more source

Helioseismology with long-range dark matter-baryon interactions [PDF]

open access: yes, 2014
Assuming the existence of a primordial asymmetry in the dark sector, we study how long-range dark matter (DM)-baryon interactions, induced by the kinetic mixing of a new U(1) gauge boson and a photon, affect the evolution of the Sun and, in turn, the ...
Lopes I., Panci P., Silk J.
core   +2 more sources

Global seismology of the Sun

open access: yesLiving Reviews in Solar Physics, 2016
The seismic study of the Sun and other stars offers a unique window into the interior of these stars. Thanks to helioseismology, we know the structure of the Sun to admirable precision. In fact, our knowledge is good enough to use the Sun as a laboratory.
Sarbani Basu
doaj   +1 more source

A Spectral Solver for Solar Inertial Waves

open access: yesThe 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

Inversions of Stellar Structure From Asteroseismic Data

open access: yesFrontiers 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   +6 more
doaj   +1 more source

Image compression in local helioseismology

open access: yes, 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   +10 more
core   +1 more source

Local Helioseismology Analyses with Hinode/SOT Datasets

open access: yes, 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

open access: yesMeteoritics &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   +16 more
wiley   +1 more source

Towards inertial-mode helioseismology: Direct sensing of solar rotation at 75° latitude and 0.8 R⊙

open access: yesAstronomy & Astrophysics
Context. Because solar global inertial modes are highly sensitive to differential rotation, they may provide new diagnostics of internal rotation at high latitudes, where acoustic-mode helioseismology provides only weak constraints. Aims.
Dey Prithwitosh   +2 more
doaj   +1 more source

Inferring the Solar Meridional Circulation Flow Profile by Applying Bayesian Methods to Time–Distance Helioseismology

open access: yesThe Astrophysical Journal, 2023
Mapping the large-scale subsurface plasma flow profile within the Sun has been attempted using various methods for several decades. One such flow in particular is the meridional circulation, for which numerous studies have been published.
Aleczander Herczeg, Jason Jackiewicz
doaj   +1 more source

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