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31 papers · 1 filter
Heating signatures in the disk counterparts of solar spicules in IRIS observations
L. Rouppe van der Voort, B. De Pontieu, T. M. D. Pereira +2
We use coordinated observations with the Interface Region Imaging Spectrograph (IRIS) and the Swedish 1-m Solar Telescope (SST) to identify the disk counterpart of type II spicules…
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…
Interplanetary Propagation Behavior of the Fast Coronal Mass Ejection from 23 July 2012
Manuela Temmer, Nariaki Nitta
The fast coronal mass ejection (CME) from 23 July 2012 raised attention due to its extremely short transit time from Sun to 1 AU of less than 21 h. In-situ data from STEREO-A revea…
Imaging and spectroscopic observations of magnetic reconnection and chromospheric evaporation in a solar flare
Hui Tian, Gang Li, Katharine K. Reeves +5
Magnetic reconnection is believed to be the dominant energy release mechanism in solar flares. The standard flare model predicts both downward and upward outflow plasmas with speed…
RH 1.5D: a massively parallel code for multi-level radiative transfer with partial frequency redistribution and Zeeman polarisation
Tiago M. D. Pereira, Han Uitenbroek
The emergence of three-dimensional magneto-hydrodynamic (MHD) simulations of stellar atmospheres has sparked a need for efficient radiative transfer codes to calculate detailed syn…