#magnetism — Public Fediverse posts
Live and recent posts from across the Fediverse tagged #magnetism, aggregated by home.social.
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If you suspect that this might be somewhat less than an excellent podcast, perhaps a dull rehashing of what you might already know, check out the comments. Chuck was in the zone.
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NASA's Parker Solar Probe Flew In And Out Of The Solar Corona And Found A Source Of High-Energy Particles That No Existing Model Had Predicted
(When NASA's Parker Solar Probe passed through the solar corona during perihelion encounters at the heliospheric current sheet, its instruments recorded energetic protons at energies far above what existing models of particle acceleration at that location could account for.)
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https://spacedaily.com/n-nasas-parker-solar-probe-flew-in-and-out-of-the-solar-corona-and-found-a-source-of-high-energy-particles-that-no-existing-model-had-predicted/ <-- shared technical article
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https://doi.org/10.3847/2041-8213/ae3ca1 <-- shared paper
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https://www.space.com/high-energy-particles-source-space-weather <-- shared technical article
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https://youtu.be/Woo4yZby4BU?si=rzzND3qJkubGKyTo <-- shared space weather overview effects video, #AIslop notwithstanding 🙃 🫠 😉
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“… A team… at the Southwest Research Institute… and… the University of Maryland’s Institute for Research in Electronics and Applied Physics has published an analysis of those measurements [link above]…, identifying magnetic reconnection at the heliospheric current sheet as the mechanism responsible. The proton energies detected were, in the study’s framing, approximately a thousand times greater than the available magnetic energy per particle that models of this process had predicted.
The finding matters for two reasons: it identifies a source of energetic particles close to the Sun that was not anticipated, and it raises questions about how far the existing understanding of reconnection-driven particle acceleration extends…
The Parker measurements suggest that picture needs revision. The magnetic island merging mechanism [the authors] identif[ied] can evidently produce proton populations at energies that challenge the boundary between what reconnection does and what shock acceleration does. Whether this source can explain a significant fraction of observed near-Earth energetic particle events, or whether it contributes mainly at energies and scales that remain confined close to the Sun, is a question the paper does not yet resolve…
Solar Orbiter, the European Space Agency mission operating in coordination with Parker, offers complementary measurements at somewhat greater distances. Comparing what the two spacecraft measure of the same particle populations as they propagate outward from the Sun will help establish which features originate close to the source and which are modified by the intervening solar wind. The energetic particle observations that puzzled researchers in the pre-Parker era now have a candidate mechanism. Whether that mechanism accounts for a large or small fraction of what actually reaches Earth remains the open question…”
#sun #solar #solarsystem #heliosphere #Parker #SolarOrbiter #spacecraft #research #monitoring #instrumentatin #spaceweather #solarflare #coronalmassejection #CME #NASA #ESA #magnetism #geomagnetism #proton #energy #particleacceleration #measurement #solarwind #risk #hazard #impacts #corona #perihelion #model #modeling
@nasa @esa -
A Rare Alignment Is On The Move. 🧭 [Three Norths]
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https://www.ordnancesurvey.co.uk/news/three-norths-departing-england <-- shared technical article
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https://youtu.be/18kQrt3KCbM?si=a9fXvjAbrgTU8ylx <-- shared video overview
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“On 13 December, the rare alignment of true north, magnetic north and grid north - known as the three norths - leaves England at Berwick-upon-Tweed, bringing a remarkable three-year chapter to a close.
Magnetic north is monitored using geomagnetic data from the British Geological Survey, combined with Ordnance Survey’s National Grid to track how this alignment shifts over time..."
#truenorth #magneticnorth #gridnorth #UK #coincidence #navigation #threenorths #alignment #GIS #spatial #mapping #projection #globe #north #model #modeling #magnetism #geomagnetism #England #survey #triplealignment #NationalGrid
@Ordnance Survey -
Ready to explore the intriguing realm of three-dimensional magnetism? Join another MPI-PKS lecture and discuss it online with Dr. Claire Donnelly, MPI-CPfS, and others, at https://enabla.com/set/92/pub/623/about 🧲
The talk features cutting-edge experimental investigations and provides a comprehensive overview of novel techniques in imaging and fabricating nanoscale 3D magnetic systems. You'll gain insights from exciting scientific results made possible by these recent advances. Perfect for researchers and learners interested in experimental physics and nanotechnology!
All #Enabla lectures are #free and #OpenAccess. Please support us by liking, reposting, following, commenting on this post, and engaging in discussions on Enabla. Every action helps us bring quality education to all. Thank you!🙏
#magnetism #nanotechnology #science #research #stem #physics #PhD
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The physics behind how magnets stop being magnetic when hit by a pulse of light. It's all to do to conservation of angular momentum.
#Physics #Magnetism #AngularMomentum #ConservationLaws #Science
https://arstechnica.com/science/2019/01/magnets-how-do-they-stop-working/