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The Unresolved Fine Structure Resolved - IRIS observations of the Solar Transition Region
V. Hansteen, B. De Pontieu, M. Carlsson +18
The heating of the outer solar atmospheric layers, i.e., the transition region and corona, to high temperatures is a long standing problem in solar (and stellar) physics. Solutions…
Solar Flare Chromospheric Line Emission: Comparison Between IBIS High-resolution Observations and Radiative Hydrodynamic Simulations
Fatima Rubio da Costa, Lucia Kleint, Vahé Petrosian +2
Solar flares involve impulsive energy release, which results in enhanced radiation over a broad spectral range and a wide range of heights. In particular, line emission from the ch…
Evidence of Non-Thermal Particles in Coronal Loops Heated Impulsively by Nanoflares
Paola Testa, Bart De Pontieu, Joel Allred +21
The physical processes causing energy exchange between the Sun's hot corona and its cool lower atmosphere remain poorly understood. The chromosphere and transition region (TR) form…
Photon mean free paths, scattering, and ever-increasing telescope resolution
Philip Judge, Lucia Kleint, Han Uitenbroek +3
We revisit an old question: what are the effects of observing stratified atmospheres on scales below a photon mean free path? The mean free path of photons emerging from the solar…
On the Origin of a Sunquake during the 29 March 2014 X1 Flare
Philip G. Judge, Lucia Kleint, Alina Donea +2
Helioseismic data from the HMI instrument have revealed a sunquake associated with the X1 flare SOL2014-03-29T17:48 in active region NOAA 12017. We try to discover if acoustic-like…
Hydrogen Balmer Continuum in Solar Flares Detected by the Interface Region Imaging Spectrograph (IRIS)
Petr Heinzel, Lucia Kleint
We present a novel observation of the white-light flare (WLF) continuum, which was significantly enhanced during the X1 flare on March 29, 2014 (SOL2014-03-29T17:48). Data from the…