Now showing items 1-9 of 9

    • Bombs and flares at the surface and lower atmosphere of the Sun 

      Hansteen, V. H.; Archontis, V.; Pereira, T. M. D.; Carlsson, M.; Rouppe van der Voort, L.; Leenaarts, J. (2017-04-10) - Journal article
      A spectacular manifestation of solar activity is the appearance of transient brightenings in the far wings of the Hα line, known as Ellerman bombs (EBs). Recent observations obtained by the Interface Region Imaging ...
    • The coronal monsoon : thermal nonequilibrium revealed by periodic coronal rain 

      Auchère, Frédéric; Froment, Clara; Soubrié, Elie; Antolin, Patrick; Oliver, Ramon; Pelouze, Gabriel (2018-02-05) - Journal article
      We report on the discovery of periodic coronal rain in an off-limb sequence of Solar Dynamics Observatory/Atmospheric Imaging Assembly images. The showers are co-spatial and in phase with periodic (6.6 hr) intensity ...
    • The evolution of solar flux from 0.1 nm to 160 μm : quantitative estimates for planetary studies 

      Claire, Mark W.; Sheets, John; Cohen, Martin; Ribas, Ignasi; Meadows, Victoria S.; Catling, David C. (2012-09-06) - Journal article
      Understanding changes in the solar flux over geologic time is vital for understanding the evolution of planetary atmospheres because it affects atmospheric escape and chemistry, as well as climate. We describe a numerical ...
    • First high-resolution spectroscopic observations of an erupting prominence within a coronal mass ejection by the Interface Region Imaging Spectrograph (IRIS) 

      Liu, Wei; De Pontieu, Bart; Vial, Jean-Claude; Title, Alan M.; Carlsson, Mats; Uitenbroek, Han; Okamoto, Takenori J.; Berger, Thomas E.; Antolin, Patrick (2015-04-21) - Journal article
      Spectroscopic observations of prominence eruptions associated with coronal mass ejections (CMEs), although relatively rare, can provide valuable plasma and three-dimensional geometry diagnostics. We report the first ...
    • Imaging observations of magnetic reconnection in a solar eruptive flare 

      Li, Y.; Sun, X.; Ding, M. D.; Qiu, J.; Priest, E. R. (2017-01-31) - Journal article
      Solar flares are among the most energetic events in the solar atmosphere. It is widely accepted that flares are powered by magnetic reconnection in the corona. An eruptive flare is usually accompanied by a coronal mass ...
    • Measuring the electron temperatures of coronal mass ejections with future space-based multi-channel coronagraphs : a numerical test 

      Bemporad, Alessandro; Pagano, Paolo; Giordano, Silvio (2018-11) - Journal article
      Context. The determination from coronagraphic observations of physical parameters of the plasma embedded in coronal mass ejections (CMEs) is of crucial importance for our understanding of the origin and evolution of these ...
    • Simulating AIA observations of a flux rope ejection 

      Pagano, Paolo; Mackay, Duncan Hendry; Poedts, Stephan (2014-08) - Journal article
      Context. Coronal mass ejections (CMEs) are the most violent phenomena observed on the Sun. Currently, extreme ultraviolet (EUV) images from the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamic Observatory (SDO) ...
    • Solar coronal jets : observations, theory, and modeling 

      Raouafi, N. E.; Patsourakos, S.; Pariat, E.; Young, P. R.; Sterling, A. C.; Savcheva, A.; Shimojo, M.; Moreno-Insertis, F.; DeVore, C. R.; Archontis, V.; Török, T.; Mason, H.; Curdt, W.; Meyer, K.; Dalmasse, K.; Matsui, Y. (2016-11) - Journal article
      Coronal jets represent important manifestations of ubiquitous solar transients, which may be the source of significant mass and energy input to the upper solar atmosphere and the solar wind. While the energy involved in a ...
    • Ultraviolet and extreme-ultraviolet emissions at the flare footpoints observed by atmosphere imaging assembly 

      Qiu, J.; Sturrock, Z.; Longcope, D.W.; Klimchuk, J.A.; Liu, W.-J. (2013-09-01) - Journal article
      A solar flare is composed of impulsive energy release events by magnetic reconnection, which forms and heats flare loops. Recent studies have revealed a two-phase evolution pattern of UV 1600 Å emission at the feet of these ...