Browsing by Subject "Corona"

Now showing items 1-4 of 4

    • LOFAR observations of the quiet solar corona 

      GALLAGHER, PETER; Vocks, C.; Mann, G.; Breitling, F.; Bisi, M.M.; Dabrowski, B.; Fallows, R.; Krankowski, A.; Magdalenić, J.; Marqué, C.; Morosan, D.; Rucker, H. (2018)
      Context. The quiet solar corona emits meter-wave thermal bremsstrahlung. Coronal radio emission can only propagate above that radius, Rω, where the local plasma frequency equals the observing frequency. The radio interferometer ...

    • The solar origins and earth impacts of space weather 

      GARTON, TADHG MARK (Trinity College Dublin. School of Physics. Discipline of Physics, 2020)
      Coronal Holes (CHs) are expansive, low density, open magnetic field regions which appear dark in extreme-ultraviolet (EUV) images of the solar corona. CHs are associated with the acceleration of the high speed solar wind ...

    • The SWAP EUV Imaging Telescope Part I: Instrument Overview and Pre-Flight Testing 

      GALLAGHER, PETER; BLOOMFIELD, SHAUN (2013)
      The Sun Watcher with Active Pixels and Image Processing (SWAP) is an EUV solar telescope on board ESA?s Project for Onboard Autonomy 2 (PROBA2) mission launched on 2 November 2009. SWAP has a spectral band- pass centered ...

    • Tracking of an electron beam through the solar corona with LOFAR 

      GALLAGHER, PETER; Mann, G.; Breitling, F.; Vocks, C.; Aurass, H.; Steinmetz, M.; Strassmeier, K.G.; Bisi, M.M.; Fallows, R.A.; Gallagher, P.; Kerdraon, A.; Mackinnon, A.; Magdalenic, J.; Rucker, H.; Anderson, J.; Asgekar, A.; Avruch, I.M.; Bell, M.E.; Bentum, M.J.; Bernardi, G.; Bonafede, A.; Broderick, J.W.; Brüggen, M.; Butcher, H.R.; Ciardi, B.; Costanje, A.; de Gasperin, F.; de Geus, E.; Deller, A.; Duscha, S. (2018)
      The Sun’s activity leads to bursts of radio emission, among other phenomena. An example is type-III radio bursts. They occur frequently and appear as short-lived structures rapidly drifting from high to low frequencies in ...