Long-Term Datasets for the Understanding of Solar and Stellar Magnetic Cycles

Країна: Індія

Місто: Jaipur

Тези до: 30.09.2017

Дати: 19.02.15 — 24.02.18

Е-мейл Оргкомітету: dipu[AT]iiap.res.in, iaus340 [AT]iiap.res.in

Організатори: IAU


Solar variations have significant influence on the Earth’s space environment and climate via its magnetic field, irradiation and energetic particles. Long-term and reliable historical datasets of solar and stellar activity indices are crucial for understanding the variations and predicting the future solar cycle. Cosmogenic and radionuclides can extend our knowledge of solar variations back to the Holocene. There are a number of important and hot issues relevant to the evolution of solar activity and variability. These include, how to build up longterm consistent datasets, e.g., sunspot number and solar irradiance, how to realistically reconstruct the physics parameters, e.g., interior convection spectrum and photospheric open flux, based on the records, how to understand the relations among different indices, how to model the solar cycles based on the observed data. Furthermore, the progress in the understanding of the stellar variability and activity cycles helps us to understand the solar cycle over a much wider sample of parameters.

This symposium will bring together scientists from diverse, interdisciplinary areas such as solar, stellar, space and heliospheric physics to review the status of the different long-term datasets available across the globe. It will also provide a platform to exchange ideas on the understanding of solar long-term behavior, its effects and prediction. The Kodaikanal Observatory has observed the sun with a broad band filter in visible light (so called, "white light") and such wavelengths as Ca-II K and H-alpha since 1904. The digitization process has been completed recently and data has been made available to the global community. Thus hosting the meeting in India will provide new impetus to the study of long-term variation studies of the sun from this region.


    Helio/asteroseismology long-term data: solar/stellar interior velocity fields --
    status, divergence, and challenges
    Long term magnetic field measurements in the sun and stars
    Sunspot number datasets: status, divergences, and unification
    Solar total irradiance and spectral irradiance long-term data: status,
    divergences, and challenges
    Solar cycle database of solar activity: variations in solar eruptions (flares,
    CMEs, SEPs, etc.)
    Long-term monitoring of stellar activity: lessons for the solar cycle
    The variable solar wind and the heliosphere
    Solar behavior over centuries using radioisotopes
    Physical causes of the solar/stellar cycle irregularities
    From past to future: predicting upcoming solar cycle 25


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