Browsing by Subject "Stars -- Atmospheres"

Browsing by Subject "Stars -- Atmospheres"

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    Comparative modelling of the spectra of cool giants 
    Lebzelter, T.; Heiter, U.; Abia, C.; Eriksson, K.; Ireland, M.; Neilson, H.; Nowotny, W.; Maldonado, J.; Merle, T.; Peterson, R.; Short, C. Ian (Christopher Ian), 1965- (European Southern ObservatoryEDP Sciences, 2012)
    Context. Our ability to extract information from the spectra of stars depends on reliable models of stellar atmospheres and appropriate techniques for spectral synthesis. Various model codes and strategies for the analysis ...

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    Determination of effective temperatures and luminosities for rotating stars 
    Deupree, Robert G. (Robert Gaston), 1946-; Short, C. Ian (Christopher Ian), 1965-; Gillich, A.; Lovekin, C. C.; Toque, N. (American Astronomical Society, 2008-08)
    Spectral energy distributions for models of arbitrarily rotating stars are computed using two-dimensional rotating stellar models, NLTE plane-parallel model atmospheres, and a code to integrate the appropriately weighted ...

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    Integrated light stellar population synthesis of globular clusters using non-local thermodynamic equilibrium modelling 
    Young, Mitchell E. (Halifax, N.S. : Saint Mary's University, 2018)
    We present an investigation of McWilliam & Bernstein's 2008 globular cluster (GC) stellar population synthesis method, focusing on the impact of non-local thermodynamic equilibrium (NLTE) modeling effects. For this purpose, ...

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    Modeling the near-ultraviolet band of GK stars. III. dependence on abundance pattern 
    Short, C. Ian (Christopher Ian), 1965-; Campbell, Eamonn A. (American Astronomical Society, 2013-06-01)
    We extend the grid of non-LTE (NLTE) models presented in Paper II to explore variations in abundance pattern in two ways: (1) the adoption of the Asplund et al. (GASS10) abundances, (2) for stars of metallicity, [M/H], ...

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    Modeling the near-UV band of GK stars. II. Non-LTE models 
    Short, C. Ian (Christopher Ian), 1965-; Campbell, Eamonn A.; Pickup, Heather; Hauschildt, Peter H. (IOP Publishing Limited, 2012-03-10)
    We present a grid of atmospheric models and synthetic spectral energy distributions (SEDs) for late-type dwarfs and giants of solar and 1/3 solar metallicity with many opacity sources computed in self-consistent non-local ...

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    NLTE AND LTE Lick indices for red giants from [Fe/H] 0.0 TO −6.0 AT SDSS AND IDS spectral resolution 
    Short, C. Ian (Christopher Ian), 1965-; Young, Mitchell E.; Layden, Nicholas (American Astronomical Society, 2015-09-01)
    We investigate the dependence of the complete system of 22 Lick indices on overall metallicity scaled from solar abundances, [M/H], from the solar value, 0.0, down to the extremely metal-poor (XMP) value of −6.0, for ...

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    Non-local thermodynamic equilibrium 1.5D modeling of red giant stars 
    Young, Mitchell E.; Short, C. Ian (Christopher Ian), 1965- (IOP Publishing, 2014-05-20)
    Spectra for two-dimensional (2D) stars in the 1.5D approximation are created from synthetic spectra of one-dimensional (1D) non-local thermodynamic equilibrium (NLTE) spherical model atmospheres produced by the PHOENIX ...

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    Scaling of observable properties in rotating stars 
    Castaneda, Diego; Deupree, Robert G. (Robert Gaston), 1946- (The American Astronomical Society, 2014-10-10)
    The spectral energy distribution as a function of inclination is computed using two-dimensional rotating stellar models and NLTE plane parallel stellar atmospheres. These models cover the range from 1.875M☉ to ...

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    Surface temperature and synthetic spectral energy distributions for rotationally deformed stars 
    Deupree, Robert G. (Robert Gaston), 1946-; Lovekin, C. C.; Short, C. Ian (Christopher Ian), 1965- (American Astronomical SocietyIOP Publishing, 2006-05-20)
    Extreme deformation of a stellar surface, such as that produced by rapid rotation, causes the surface temperature and gravity to vary significantly with latitude. Thus, the spectral energy distribution (SED) of a nonspherical ...