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Capacity Bounds for Optical Interference Channels Subject to Average Power Constraints
Viswanathan Ramachandran
Accurate information-theoretic analysis of multiuser wavelength-division multiplexed (WDM) optical links is complicated by Kerr nonlinearity and chromatic dispersion. Existing capa…
Sunrise III/SUSI reveals extended and spectrally structured Ca II K emission above the solar limb
Ivan Milić, Christopher M. J. Osborne, Francisco A. Iglesias +32
The Sunrise III/SUSI instrument performed a sit-and-stare observation of the off-limb emission in the Ca II K line core, with a combination of excellent temporal and spectral resol…
Nature of small-scale Ca II H brightenings associated with weak fields in a quiet Sun region
Xiang Li, H. N. Smitha, S. K. Solanki +3
Context. Chromospheric emission observed in the Ca II H and K resonance lines is generally positively correlated with photospheric magnetic fields. However, a fraction of strong Ca…
Origin of small-scale evaporation flows deep in the chromosphere during a solar flare
L. P. Chitta, H. N. Smitha, F. A. Iglesias +29
Flares are caused by an abrupt release of magnetic energy in the solar atmosphere. Plasma heated to well over 10 MK filling the post-flare corona originates from a rapid heating an…
Elemental Composition Evolution during the 2024 September 30 Solar Eruption: A Comparison of Hot and Cool Plasma Components with Solar Orbiter/SPICE, Hinode/EIS, and Chandrayaan-2/XSM
Momchil Molnar, Joseph Plowman, Amir Caspi +7
Solar plasma composition differs between the photosphere and corona over a range of timescales, with preferential enhancement of elements with low first ionization potential (FIP).…
Exploring if a coronal dimming event can produce coronal hole-like properties
Adriana De-Sassi, Louise Harra, Krzysztof Barczynski +8
Coronal dimmings, or transient coronal holes, are manifested as a sudden reduction in extreme ultraviolet (EUV) and X-ray emission, often following solar eruptions. We investigate…
Height Dependent Phase Shifts of Wave Pulses in the Lower Solar Atmosphere Measured with SUNRISE III
Andreas Lagg, H. N. Smitha, Sami K. Solanki +32
We report on the measurement of the height-dependent time shifts of wave pulses in the lower solar atmosphere from high-resolution spectro-polarimetric observations obtained with t…
Solar flare ribbons structured by uncombed chromospheric loops
L. P. Chitta, E. R. Priest, David Orozco Suárez +33
A part of the magnetic energy released during a flare is transported to the lower atmosphere. High-resolution observations show that flare ribbons, sites of energy deposition at th…
Small-scale impulsive EUV emission enhancements along network loops
A. Dolliou, H. Peter, S. Mandal +4
Network loops are a common feature in the quiet Sun. The physical processes sustaining their energy budget is still under discussion. We rely on a multi-instrumental (Solar Orbiter…
High-resolution observations of small-scale activity in coronal hole plumes
Ziwen Huang, L. P. Chitta, L. Teriaca +5
Plumes have been proposed to channel MHD waves and the solar wind into the heliosphere. High-speed propagating disturbances (PDs), though well detected in plumes, cannot yet be cle…
Magnetic structure of coronal dark halos
J. D. Nölke, S. K. Solanki, J. Hirzberger +5
At low coronal temperatures around or below 1 MK distinct areas in the surroundings of active regions (AR) show emission at a level significantly below the emission coming from the…