Long-term flare energy variation driven by the dipole moment of solar magnetic field
Küçük Resim Yok
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Cambridge University Press
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
In this study, the results obtained using GOES satellite X-ray data and MWO and WSO measurements of the solar magnetic field between 1976 and 2022 are compared and discussed. By analysing GOES satellite X-ray data in 47 different time periods of one month long, 7 500 solar flares are obtained, the flare equivalent duration distributions against the total duration of the flare are statistically modelled, and then their variation via time is examined. The variations of the model parameters such as the Plateau, which is considered as an indicator of the stellar saturation level in an observation season, and the flare timescales via time are examined. We noticed that the variation found in the solar magnetic field and the variation determined in the flare saturation levels are very similar. As a result, it is well known that the solar magnetic dipole moment measured from the solar poles steadily decreased from 1976 to 2022. We revealed that the solar X-ray flare energies are also generally decreasing in the same trend. This decrease is also evident in flare timescales, indicating that the geometry of solar magnetic loops is getting smaller over time.
Açıklama
Anahtar Kelimeler
Techniques: photometric, methods: data analysis, methods: statistical, Sun, activity, Sun: flares, Sun: X-rays, gamma rays
Kaynak
Publications of the Astronomical Society of Australia
WoS Q Değeri
Q1
Scopus Q Değeri
Q1
Cilt
41
Sayı
Dec
Künye
Yoldaş, E., & Dal, H. A. (2024). Long-term flare energy variation driven by the dipole moment of solar magnetic field. Publications of the Astronomical Society of Australia, 41, e113.
