Quasi-periodic pulsations in solar flares: a key diagnostic of energy release on the Sun
Solar flares are among the most powerful and disruptive events in our solar system, however the physical mechanisms driving and transporting this energetic release are not fully understood. An important signature associated with flare energy release is highly variable emission on timescales of sub-s...
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Format | Journal Article |
Language | English |
Published |
22.02.2023
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Abstract | Solar flares are among the most powerful and disruptive events in our solar
system, however the physical mechanisms driving and transporting this energetic
release are not fully understood. An important signature associated with flare
energy release is highly variable emission on timescales of sub-seconds to
minutes which often exhibit oscillatory behaviour, features collectively known
as quasi-periodic pulsations (QPPs). To fully identify the driving mechanism of
QPPs, exploit their potential as a diagnostic tool, and incorporate them into
our understanding of solar and stellar flares, new observational capabilities
and initiatives are required. There is a clear community need for
flare-focused, rapid cadence, high resolution, multi-wavelength imaging of the
Sun, with high enough sensitivity and dynamic range to observe small
fluctuations in intensity in the presence of a large overall intensity.
Furthermore, multidisciplinary funding and initiatives are required to narrow
the gap between numerical models and observations. QPPs are direct signatures
of the physics occurring in flare magnetic reconnection and energy release
sites and hence are critical to include in a unified flare model. Despite
significant modelling and theoretical work, no single mechanism or model can
fully explain the presence of QPPs in flares. Moreover, it is also likely that
QPPs fall into different categories that are produced by different mechanisms.
At present we have insufficient information to observationally distinguish
between mechanisms. The motivation to understand QPPs is strengthened by the
geo-effectiveness of flares on the Earth's ionosphere, and by the fact that
stellar flares exhibit similar QPP signatures. QPPs present a golden
opportunity to better understand flare physics and exploit the solar-stellary
analogy, benefiting both astrophysics, heliophysics, and the solar-terrestrial
connection. |
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AbstractList | Solar flares are among the most powerful and disruptive events in our solar
system, however the physical mechanisms driving and transporting this energetic
release are not fully understood. An important signature associated with flare
energy release is highly variable emission on timescales of sub-seconds to
minutes which often exhibit oscillatory behaviour, features collectively known
as quasi-periodic pulsations (QPPs). To fully identify the driving mechanism of
QPPs, exploit their potential as a diagnostic tool, and incorporate them into
our understanding of solar and stellar flares, new observational capabilities
and initiatives are required. There is a clear community need for
flare-focused, rapid cadence, high resolution, multi-wavelength imaging of the
Sun, with high enough sensitivity and dynamic range to observe small
fluctuations in intensity in the presence of a large overall intensity.
Furthermore, multidisciplinary funding and initiatives are required to narrow
the gap between numerical models and observations. QPPs are direct signatures
of the physics occurring in flare magnetic reconnection and energy release
sites and hence are critical to include in a unified flare model. Despite
significant modelling and theoretical work, no single mechanism or model can
fully explain the presence of QPPs in flares. Moreover, it is also likely that
QPPs fall into different categories that are produced by different mechanisms.
At present we have insufficient information to observationally distinguish
between mechanisms. The motivation to understand QPPs is strengthened by the
geo-effectiveness of flares on the Earth's ionosphere, and by the fact that
stellar flares exhibit similar QPP signatures. QPPs present a golden
opportunity to better understand flare physics and exploit the solar-stellary
analogy, benefiting both astrophysics, heliophysics, and the solar-terrestrial
connection. |
Author | Zimovets, Ivan Battaglia, Marina McLaughlin, James Hayes, Laura Kolotkov, Dmitrii Collier, Hannah Kupriyanova, Elena Mehta, Tishtrya Chen, Thomas Y Moore, Christopher Li, Bo Suarez, Crisel Inglis, Andrew Guidoni, Silvina Dominique, Marie Knuth, Trevor Nakariakov, Valery M Cécere, Mariana Zurbriggen, Ernesto Reep, Jeff Van Doorsselaere, Tom |
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BackLink | https://doi.org/10.48550/arXiv.2302.11549$$DView paper in arXiv |
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Snippet | Solar flares are among the most powerful and disruptive events in our solar
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Title | Quasi-periodic pulsations in solar flares: a key diagnostic of energy release on the Sun |
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