Results 21 to 30 of about 5,529 (192)
A Multicomponent Magnetic Proxy for Solar Activity
Space Weather, Volume 19, Issue 12, December 2021., 2021 Abstract We present a new, multicomponent magnetic proxy for solar activity derived from full disk magnetograms that can be used in the specification and forecasting of the Sun’s radiative output. To compute this proxy we project Carrington maps, such as the synchronic Carrington maps computed with the Advective Flux Transport (AFT) surface flux ...
Harry P. Warren +2 more
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A Multi‐Purpose Heliophysics L4 Mission
Space Weather, Volume 19, Issue 9, September 2021., 2021 Abstract The Earth‐Sun Lagrangian point 4 is a meta‐stable location at 1 AU from the Sun, 60° ahead of Earth's orbit. It has an uninterrupted view of the solar photosphere centered on W60, the Earth's nominal magnetic field connection to the Sun. Such a mission on its own would serve as a solar remote sensing observatory that would oversee the entire ...
A. Posner +15 more
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R2O2R Improvements Identified by United States Space Weather Forecasters
Space Weather, Volume 19, Issue 6, June 2021., 2021 Abstract A communication deficit exists between the space weather research and forecast communities in the research‐to‐operations‐to‐research (R2O2R) pipeline. No formal, citable space exists for forecasters to communicate needs and lessons learned to the research community (O2R).
E. C. Butler, J. M. Keller
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Physics Today, 1995 What powers the Sun? Why does it have spots? How long will it sustain life on Earth? Efforts to answer these questions about the astrophysical object that is of greatest importance to humanity have produced many advances in physics and helped lay the main foundations of astrophysics. The three questions, however, remain to be answered. For example, the
openaire +2 more sources
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 +26 more
core +2 more sources
Waves from the Sun: to the 100th anniversary of V.A. Troitskaya’s birth
Solar-Terrestrial Physics, 2017 It has been one hundred years since the birth of the outstanding scientist Professor V.A. Troitskaya. Her remarkable achievements in solar-terrestrial physics are widely known. For many years, Valeria A.
Guglielmi A.V., Potapov A.S.
doaj +1 more source
The 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
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Fluids, 2023 Contemporary three-dimensional physics-based simulations of the solar convection zone disagree with observations. They feature differential rotation substantially different from the true rotation inferred by solar helioseismology and exhibit a conveyor ...
Parag Gupta +2 more
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Saturn's Rings as a Seismograph to Probe Saturn's Internal Structure
AGU Advances, Volume 1, Issue 2, June 2020., 2020 As it has already done for Earth, the Sun, and the stars, seismology has the potential to radically change the way the interiors of giant planets are studied. In a sequence of events foreseen by only a few, observations of Saturn's rings by the Cassini spacecraft have rapidly broken ground on giant planet seismology. Gravity directly couples the planet'
Christopher R. Mankovich
wiley +1 more source
Global‐Scale Full‐Waveform Ambient Noise Inversion
Journal of Geophysical Research: Solid Earth, Volume 125, Issue 4, April 2020., 2020 Abstract We present the first application of full‐waveform ambient noise inversion to observed correlation functions that jointly constrains 3‐D Earth structure and heterogeneous noise sources. For this, we model and interpret ambient noise correlations as recordings of correlation wavefields, which completely eliminates the limiting assumptions of ...
Korbinian Sager +4 more
wiley +1 more source