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82 papers · 1 filter
Association of radio polar cap brightening with bright patches and coronal holes
Caius L. Selhorst, Paulo J. A. Simoes, Alexandre J. Oliveira e Silva +3
Radio-bright regions near the solar poles are frequently observed in Nobeyama Radioheliograph (NoRH) maps at 17 GHz, and often in association with coronal holes. However, the origi…
Microquasars as heating sources of the intergalactic medium during reionisation of the Universe
Vanesa M. Douna, Leonardo J. Pellizza, Philippe Laurent +1
The effect of the primeval sources of radiation and particles on the thermodynamical state of the intergalactic medium during the Epoch of Reionisation is still unclear. In this wo…
A temperate exo-Earth around a quiet M dwarf at 3.4 parsecs
Xavier Bonfils, Nicola Astudillo-Defru, Rodrigo Díaz +12
The combination of high-contrast imaging and high-dispersion spectroscopy, which has successfully been used to detect the atmosphere of a giant planet, is one of the most promising…
Constraining the accretion geometry of the intermediate polar EX Hya using NuSTAR, Swift and Chandra observations
G. J. M. Luna, K. Mukai, M. Orio +1
In magnetically accreting white dwarfs, the height above the white dwarf surface where the standing shock is formed is intimately related with the accretion rate and the white dwar…
Quantum and classical complexity in coupled maps
Pablo D. Bergamasco, Gabriel G. Carlo, Alejandro M. F. Rivas
We study a generic and paradigmatic two degrees of freedom system consisting of two coupled perturbed cat maps with different types of dynamics. The Wigner separability entropy (WS…
Relativistic Bose--Einstein condensates thin-shell wormholes
M. G. Richarte, I. G. Salako, J. P. Morais Graça +2
We construct traversable thin-shell wormholes which are asymptotically Ads/dS applying the cut and paste procedure for the case of an acoustic metric created by a relativistic Bose…