Results 51 to 60 of about 820,585 (334)
Non-LTE oxygen line formation in 3D hydrodynamic model stellar atmospheres [PDF]
, 2015 The O (Iota) 777 nm lines are among the most commonly used diagnostics for the oxygen abundances in the atmospheres of FGK-type stars. However, they form in conditions that are far from local thermodynamic equilibrium (LTE).
A. Amarsi +3 more
semanticscholar +1 more source
Solar and stellar photospheric abundances
Living Reviews in Solar Physics, 2016 The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical foundations.
Carlos Allende Prieto
doaj +1 more source
Coronal Loops with Different Metallicities and Generalized RTV Scaling Laws
The Astrophysical Journal, 2023 Stellar metallicity is a critical factor to characterize the stellar coronae because it directly affects the radiative energy loss from the atmosphere.
Haruka Washinoue, Takeru K. Suzuki
doaj +1 more source
Model atmospheres of sub-stellar mass objects [PDF]
, 2017 Sackler Distinguished Visitor program of the Institute of Astronomy at the University of ...
I. Hubeny
semanticscholar +1 more source
, 2016 Aims. Inelastic processes in low-energy Ca + H and Ca+ + H- collisions are treated for the states from the ground state up to the ionic state with the aim to provide rate coeffcients needed for non-LTE modeling of Ca in cool stellar atmospheres ...
A. K. Belyaev +5 more
semanticscholar +1 more source
On line contribution functions and examining spectral line formation in 3D model stellar atmospheres [PDF]
, 2015 Line contribution functions are useful diagnostics for studying spectral line formation in stellar atmospheres. I derive an expression for the contribution function to the abso- lute flux depression that emerges from three-dimensional box-in-a-star model
A. Amarsi
semanticscholar +1 more source
Hot Exoplanet Atmospheres Resolved with Transit Spectroscopy (HEARTS) [PDF]
Astronomy & Astrophysics, 2020 Ultra-hot Jupiters offer interesting prospects for expanding our theories on dynamical evolution and the properties of extremely irradiated atmospheres.
V. Bourrier +23 more
semanticscholar +1 more source
Study of Compton Broadening Due to Electron-Photon Scattering [PDF]
Serbian Astronomical Journal, 2010 We have investigated the effects of Compton broadening due to electron-photon scattering in hot stellar atmospheres. A purely electron-photon scattering media is assumed to have plane parallel geometry with an input radiation field localized on one ...
Srinivasa Rao, M.
doaj +3 more sources
Stark broadening parameter tables for neutral calcium spectral lines. I [PDF]
Serbian Astronomical Journal, 1999 Using a semiclassical approach, we have calculated electron−, proton−, He II−, Mg II-, Si II- and Fe II-impact line widths and shifts for 189 Ca I multiplets as a function of temperature.
Dimitrijević M.S., Sahal−Bréchot S.
doaj +1 more source
Limb darkening and exoplanets: testing stellar model atmospheres and identifying biases in transit parameters [PDF]
, 2015 Limb-darkening is fundamental in determining transit lightcurve shapes, and is typically modeled by a variety of laws that parametrize the intensity profile of the star that is being transited.
N. Espinoza, A. Jord'an
semanticscholar +1 more source