Results 51 to 60 of about 882,024 (358)
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
Stellar abundance analyses in the light of 3D hydrodynamical model atmospheres [PDF]
, 2003 I describe recent progress in terms of 3D hydrodynamical model atmospheres and 3D line formation and their applications to stellar abundance analyses of late-type stars.
Asplund, Martin
core +2 more sources
Synthetic photometry for M and K giants and stellar evolution: hydrostatic dust-free model atmospheres and chemical abundances [PDF]
, 2016 Based on a grid of hydrostatic spherical COMARCS models for cool stars, we have calculated observable properties of these objects, which will be mainly used in combination with stellar evolution tracks and population synthesis tools.
B. Aringer +4 more
semanticscholar +1 more source
Using limb darkening to measure fundamental parameters of stars
, 2012 Context. Limb darkening is an important tool for understanding stellar atmospheres, but most observations measuring limb darkening assume various parameterizations that yield no significant information about the structure of stellar atmospheres. Aims. We
An +21 more
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Ca line formation in late-type stellar atmospheres [PDF]
Astronomy & Astrophysics, 2015 Context. Departures from local thermodynamic equilibrium (LTE) distort the calcium abundance derived from stellar spectra in various ways, depending on the lines used and the stellar atmospheric parameters.
Y. Osorio +8 more
semanticscholar +1 more source
Center-to-limb polarization in continuum spectra of F, G, K stars
, 2015 Context. Scattering and absorption processes in stellar atmosphere affect the center-to-limb variations of the intensity (CLVI) and the linear polarization (CLVP) of stellar radiation. Aims. There are several theoretical and observational studies of CLVI
Berdyugina, S. V., Kostogryz, N. M.
core +1 more source
Gravitational microlensing as a test of stellar model atmospheres [PDF]
, 2002 We present calculations illustrating the potential of gravitational microlensing to discriminate between classical models of stellar surface brightness profiles and the recently computed ``Next Generation'' models of Hauschildt et al.
Albrow +21 more
core +3 more sources
Mg line formation in late-type stellar atmospheres - I. The model atom [PDF]
, 2015 Context. Magnesium is an element of significant astrophysical importance, often traced in late-type stars using lines of neutral magnesium, which is expected to be subject to departures from local thermodynamic equilibrium (LTE).
Y. Osorio +8 more
semanticscholar +1 more source
, 2013 The atmospheres of cool main-sequence stars are structured by convective flows from the convective envelope that penetrate the optically thin layers and lead to structuring of the stellar atmospheres analogous to solar granulation.
Beeck, Benjamin +3 more
core +2 more sources
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