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87 papers · 1 filter
Lithium spectral line formation in stellar atmospheres. The impact of convection and NLTE effects
J. Klevas, A. Kučinskas, M. Steffen +2
Different simplified approaches are used to account for the non-local thermodynamic equilibrium (NLTE) effects with 3D hydrodynamical model atmospheres. In certain cases, chemical…
Carbon-enhanced metal-poor stars in different environments
Stefania Salvadori, Asa Skuladottir, Matteo de Bennassuti
The origin of carbon-enhanced metal-poor (CEMP) stars and their possible connections with the chemical elements produced by the first stellar generations is still highly debated. W…
Young tidal dwarf galaxies cannot be used to probe dark matter in galaxies
H. Flores, F. Hammer, S. Fouquet +4
The location of dark-matter free, tidal dwarf galaxies (TDGs) in the baryonic Tully Fisher (bTF) diagram has been used to test cosmological scenarios, leading to various and contro…
Imaging Jupiter's radiation belts down to 127 MHz with LOFAR
J. N. Girard, P. Zarka, C. Tasse +71
Context. Observing Jupiter's synchrotron emission from the Earth remains today the sole method to scrutinize the distribution and dynamical behavior of the ultra energetic electron…
Tracing differential reddening with Diffuse Interstellar Bands. The globular cluster M 4 as a testbed
A. Monreal-Ibero, R. Lallement, L. Puspitarini +2
Diffuse interstellar bands (DIBs) are weak absorption features of interstellar origin present in the optical and infrared spectra of stars. Their use as a tool to trace the structu…
Extended nebular emission in CALIFA early-type galaxies
J. M. Gomes, P. Papaderos, C. Kehrig +3
The morphological, spectroscopic and kinematical properties of the warm interstellar medium (wim) in early-type galaxies (ETGs) hold key observational constraints to nuclear activi…