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#magneticfield — Public Fediverse posts

Live and recent posts from across the Fediverse tagged #magneticfield, aggregated by home.social.

  1. Earth's Magnetic Shield Protecting The Planet From A Pelting By The Solar Wind
    See how the sun's energy drives a remarkable planetary engine, the climate
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    youtu.be/6hD52H7rQak?si=OBGYbK <-- shared video
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    [‘cannibalising’ (sic) my own post (!) to bring attention to this outstanding video visualisation and overview, science education/explanation at its finest!; narrated so well (of course!) by #liamneeson !!]
    #GIS #spatial #mapping #geology #structuralgeology #magneticfield #SouthAtlanticAnomaly #SAA #spaceweather #geomagnetism #risk #hazard #hardening #magneticfieldstrength #protection #CME #coronalmassejection #sun #solar #solarwind #visualisation #visualization #education #scienceeducation #overview #explanation
    #NASA

  2. #NASA monitoring strange anomaly in #Earth's #magneticfield: a giant region of lower #magnetic intensity in skies above planet, stretching between South America and Africa.
    This vast, developing phenomenon, called #SouthAtlanticAnomaly, has intrigued and concerned scientists for years, and perhaps none more so than NASA researchers.
    Space agency's #satellites and #spacecraft are vulnerable to weakened magnetic field, and thresulting exposure to charged particles from Sun.
    sciencealert.com/nasa-is-watch

  3. ✨During the #Christmas season, we often think of #wonders and the invisible🪄 that connects our world. Did you know that scientists are searching for an invisible wonder - but in the #universe? 🌌 #Axions, the promising candidates for Dark Matter (DM)🖤, are ultra-light particles with masses around 10⁻²² eV and wavelengths of about one kiloparsec (~ 3x10¹⁶ km).

    Particles with similar properties to axions are called "axion-like particles" (ALPs). 💡ALPs, which include ultra-light axions, can alter #light polarization – meaning the alignment of #lightwaves. During an internship with us, Sarah searched for such phenomena in low-frequency #LOFAR data 📡 from the pulsar PSR J0332+5434. Low frequencies📉 are ideal, as the ionosphere – an electron layer in the Earth's atmosphere 🌍, caused by solar radiation – creates interference that can be removed from low-frequency LOFAR data through calibration.

    According to theories, axions apperars in strong magnetic fields, such as in #stellar cores, where they can escape because they interact very weakly with normal matter. Just like DM 🖤.

    Similarly, pulsars have extremely strong static magnetic fields. When cosmic ALPs enter a strong #magneticfield, they can be converted into photons – that is, light 🌟 – and thus become detectable, if ultra-light axions exist.

    Currently, there are three methods for searching for ALPs:
    1️⃣ Helioscopes for solar ALPs (e.g. IAXO, 🖥️ 1) ☀️,
    2️⃣ Haloscope searches in the galactic halo 🌌 (e.g. observing radiopulsars, 🖥️ 2), and
    3️⃣ Generating ALPs in the lab 🔬 (e.g. ALPS II, @DESY , 🖥️ 3).
    © S.Pappert, E.Moerova | MPIfR