Results 11 to 20 of about 995 (183)
Searching for Rapid Pulsations in Solar Flare X-Ray Data
The Astrophysical JournalMost studies of quasiperiodic pulsations (QPPs) in solar flares have identified characteristic periods in the 5–300 s range. Due to observational limitations, there have been few attempts to probe the
Andrew R. Inglis, Laura A. Hayes
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X-Ray Polarization of Solar Flares Measured with Rhessi [PDF]
Solar Physics, 2006 The degree of linear polarization in solar flares has not yet been precisely determined despite multiple attempts to measure it with different missions. The high energy range in particular has very rarely been explored, due to its greater instrumental difficulties.
Suarez-Garcia, E. +6 more
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Solar X-ray flare hazards on the surface of Mars [PDF]
Planetary and Space Science, 2007 Putative organisms on the Martian surface would be exposed to potentially high doses of ionizing radiation during strong solar X-ray flares. We extrapolate the observed flare frequency-energy release scaling relation to releases much larger than seen so far for the sun, an assumption supported by observations of flares on other solar- and subsolar-mass
Smith, David S., Scalo, John M.
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On the classifications of the solar active regions (ARs); Case study for solar cycles 23 and 24
Egyptian Journal of Remote Sensing and Space Sciences, 2018 The declining phase of solar cycle 23 is an important case of study. Many high energetic solar flares occurred in 2003. The occurrence of high energetic solar X-ray flares (X-type) is related to solar cycle’s phases and the state of the active regions ...
Wael Mohamed +2 more
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Solar Flare X‐Ray Impacts on Long Subionospheric VLF Paths
Space Weather, 2021 Solar flares increase the electron number concentration in the daytime ionosphere, potentially affecting radiowave propagation over several frequency ranges.
Samuel R. G. Belcher +6 more
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The Astrophysical Journal, 2023 We present light curves and flares from a 7 day, multiwavelength observational campaign of AU Mic, a young and active dM1e star with exoplanets and a debris disk. We report on 73 unique flares between the X-ray to optical data.
Isaiah I. Tristan +15 more
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September 2017 Solar Flares Effect on the Middle Atmosphere
Remote Sensing, 2022 This paper examines the response of the upper atmosphere to increased radiation following exceptional solar activity in September 2017. The active region of the Sun AR2673 has caused intense solar-terrestrial disturbance. This active region has generated
Polina Pikulina +3 more
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The Astrophysical Journal, 2023 Three generations of the Miniature X-ray Solar Spectrometer (MinXSS) have flown on small satellites with the goal “to explore the energy distribution of soft X-ray (SXR) emissions from the quiescent Sun, active regions, and during solar flares, and to ...
Thomas N. Woods +13 more
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Soft X-ray solar flare cycles [PDF]
Proceedings of the International Astronomical Union, 2004 We present a statistical investigation of soft X-ray (SXR) solar flare occurrence over the last three 11-yr solar cycles (SCs 21-23, corresponding to the period 1976-2003). We studied not only the monthly number of flares, but we also used an index that estimate the energy emitted by flares in the SXR 1-8 ˚ and (Qx) that we find it better defines their
Georgeta Maris +2 more
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Evolutionary Relationship between Sunspot Groups and Soft X-Ray Flares over Solar Cycles 21–25
The Astrophysical Journal, 2023 Studying the interaction between solar flares and sunspot groups (SGs) is crucial for understanding and predicting solar activity. We examined the distribution, correlation, and flaring rates in the northern and southern hemispheres to reveal the ...
Jiaqi Lin +5 more
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