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Helioseismology studies the structure and dynamics of the Sun's interior by observing oscillations on the surface. These studies provide information about the physical processes that control the evolution and magnetic activity of the Sun.…

Solar and Stellar Astrophysics · Physics 2015-05-27 Alexander G. Kosovichev

To model the structure and dynamics of the heliosphere well enough for high-quality forecasting, it is essential to accurately estimate the global solar magnetic field used as inner boundary condition in solar wind models. However, our…

Solar and Stellar Astrophysics · Physics 2025-10-09 Stephan G. Heinemann , Dan Yang , Shaela I. Jones , Jens Pomoell , Eleanna Asvestari , Carl J. Henney , Charles N. Arge , Laurent Gizon

This first paper in a series describes the design of a study testing whether pre-appearance signatures of solar magnetic active regions were detectable using various tools of local helioseismology. The ultimate goal is to understand…

Solar and Stellar Astrophysics · Physics 2013-03-07 K. D. Leka , G. Barnes , A. C. Birch , I. Gonzalez-Hernandez , T. Dunn , B. Javornik , D. C. Braun

Magnetohydrodynamic (MHD) seismology uses naturally occurring MHD waves to infer plasma properties that are otherwise hard to measure, especially magnetic field strength and topology, electric currents, fine structuring, transport…

The productions of data with internationally agreed standards are the common pursuits for all astronomical observation instruments both ground and spacebased undoubtedly, Since standard data to facilitate the use of scientific research. The…

Solar and Stellar Astrophysics · Physics 2019-02-04 S. Liu , X. Yang , C. Zhao , G. H. Lin

In the United States, scientific research in space weather is funded by several Government Agencies including the National Science Foundation (NSF) and the National Aeronautics and Space Agency (NASA). For commercial purposes, space weather…

Space Physics · Physics 2020-12-22 Alexei A. Pevtsov

In the summer of the year 2000, a NASA Small Explorer satellite, the High Energy Solar Spectroscopic Imager (HESSI), will be launched. It will consist of nine large, coaxial germanium detectors viewing the Sun through a set of Rotation…

Astrophysics · Physics 2007-05-23 D. M. Smith , R. P. Lin , J. McTiernan , A. S. Slassi-Sennou

The goal of the Fully Online Datacenter of Ultraviolet Emissions (FONDUE) Working Team of the International Space Science Institute in Bern, Switzerland, was to establish a common calibration of various UV and EUV heliospheric observations,…

Solar and Stellar Astrophysics · Physics 2015-06-03 M. Bzowski , J. M. Sokol , M. Tokumaru , K. Fujiki , E. Quemerais , R. Lallement , S. Ferron , P. Bochsler , D. J. McComas

This paper addresses the fundamental science question: "How does solar wind energy flow through the Earth's magnetosphere, how is it converted and distributed?". We need to understand how the Sun creates the heliosphere, and how the planets…

The flux of cosmic rays (CRs) in the heliosphere is subjected to remarkable time variations caused by the 11-year cycle of solar activity. To help the study of this effect, we have developed a web application (Heliophysics Virtual…

Space Physics · Physics 2025-03-25 David Pelosi , Nicola Tomassetti , Matteo Duranti

The scientific potential of a wide field-of-view, and very-high duty cycle, ground-based gamma-ray detector has been demonstrated by the current generation of instruments, such as HAWC and ARGO, and will be further extended in the Northern…

Instrumentation and Methods for Astrophysics · Physics 2021-03-31 Ulisses Barres de Almeida

With many large science equipment constructing and putting into use, astronomy has stepped into the big data era. The new method and infrastructure of big data processing has become a new requirement of many astronomers. Cloud computing,…

Distributed, Parallel, and Cluster Computing · Computer Science 2018-01-24 Changhua Li , Chenzhou Cui , Boliang He , Dongwei Fan , Linying Mi , Shanshan Li , Sisi Yang , Yunfei Xu , Jun Han , Junyi Chen , Hailong Zhang , Ce Yu , Jian Xiao , Chuanjun Wang , Zihuang Cao , Yufeng Fan , Liang Liu , Xiao Chen , Wenming Song , Kangyu Du

We use observations of line-of-sight magnetograms from Helioseismic and Magnetic Imager (HMI) on board of Solar Dynamics Observatory (SDO) to investigate polarity separation, magnetic flux, flux emergence rate, twist and tilt of solar…

Solar and Stellar Astrophysics · Physics 2019-02-20 A. S. Kutsenko , V. I. Abramenko , A. A. Pevtsov

Over the past two decades, helioseismology has revolutionized our understanding of the interior structure and dynamics of the Sun. Asteroseismology will soon place this knowledge into a broader context by providing structural data for…

Solar and Stellar Astrophysics · Physics 2009-06-16 T. S. Metcalfe , O. L. Creevey , J. Christensen-Dalsgaard

The Helioseismic and Magnetic Imager (HMI) onboard NASA's Solar Dynamics Observatory (SDO) produces estimates of the photospheric magnetic field which are a critical input to many space weather modelling and forecasting systems. The…

Three uniquely powerful solar and heliospheric facilities are now operational at the same time. The US National Science Foundation's Daniel K Inouye Solar Telescope, NASA's Parker Solar Probe, and ESA's Solar Orbiter each represent…

Solar and Stellar Astrophysics · Physics 2025-02-06 Thomas A. Schad , Alexandra Tritschler , Gianna Cauzzi

The CNES/European space mission COROT will monitor asteroseismic targets located in selected fields to probe stellar interiors. Therefore, suitable candidate targets have to be searched for in order to optimize the scientific return of the…

Astrophysics · Physics 2007-05-23 P. J. Amado , R. Garrido , E. Poretti , E. Michel

Three independent sets of data: i). series of filtergrams obtained in line CaII K (393.416 nm) with the ground-based telescope Precision Solar Photometric Telescope (PSPT) of Mauna Loa Solar Observatory; ii). series of filtergrams of…

Solar and Stellar Astrophysics · Physics 2014-12-05 V. I. Efremov , L. D. Parfinenko , A. A. Solovev

HelioIndex is a directory of authors who are active in solar and heliospheric physics (SHP). It is available at the webpage HelioIndex.org, and it includes several derived products such as publication lists, country and institute data,…

Solar and Stellar Astrophysics · Physics 2025-06-03 Peter R. Young
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