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106 papers · 1 filter
Modeling the Mg I from the NUV to MIR. II. Testing stellar models
J. I. Peralta, M. C. Vieytes, A. M. P. Mendez +1
Aims. We tested the new atomic model using atmospheric models of stars of different spectral types: the Sun (dG2), HD22049 (dK2, Epsilon Eridani), GJ 832 (dM2), and GJ 581 (dM3). M…
Correlation between activity indicators: H and Ca II lines in M-dwarf stars
R. V. Ibañez Bustos, A. P. Buccino, M. Flores +2
Different approaches have been adopted to study short- and long-term stellar magnetic activity, and although the mechanisms by which low-mass stars generate large-scale magnetic fi…
A Spectroscopic Analysis of a Sample of K2 Planet-Host Stars: Stellar Parameters, Metallicities and Planetary Radii
V. Loaiza-Tacuri, Katia Cunha, Verne V. Smith +5
The physical properties of transiting exoplanets are connected with the physical properties of their host stars. We present a homogeneous spectroscopic analysis based on spectra of…
Over-expansion of coronal mass ejections modelled using 3D MHD EUHFORIA simulations
C. Verbeke, B. Schmieder, P. Démoulin +5
Coronal mass ejections (CMEs) are large scale eruptions observed close to the Sun. They are travelling through the heliosphere and possibly interacting with the Earth environment c…
A Statistical Study of the Compressible Energy Cascade Rate in Solar Wind Turbulence: Parker Solar Probe Observations
Maia Brodiano, Pablo Dmitruk, Nahuel Andrés
We investigated incompressible and compressible magnetohydrodynamic (MHD) energy cascade rates in the solar wind at different heliocentric distances. We used in situ magnetic field…
Anisotropy of Magnetic Field Spectra at Kinetic Scales of Solar Wind Turbulence as Revealed by Parker Solar Probe in the Inner Heliosphere
S. Y. Huang, S. B. Xu, J. Zhang +11
Using the Parker Solar Probe data taken in the inner heliosphere, we investigate the power and spatial anisotropy of magnetic-field spectra at kinetic scales (i.e., around sub-ion…