218 datasets found

In order to investigate the formation of O I 7771-5 and [O I] 6300/6363 lines, extensive non-LTE calculations for neutral atomic oxygen were carried out for wide ranges of model...

We present a new grid of LTE model atmospheres for weakly magnetic (B<~10^10^G) neutron stars, using X opacity and equation of state data from the OPAL project and employing...

High-resolution spectra of 13 core helium-burning stars in the thick disk of the Galaxy have been obtained with the SOFIN spectrograph on the Nordic Optical Telescope to...

Files table4.dat contain calculated Stokes IQUV local line profiles of Fe II 4923.9 shown in Fig. 4 of this paper. Profile sets are provided for 0.1, 5 and 20kG magnetic fields,...

In this paper we complete the library of synthetic spectra for the range 7650-8750{AA}, which includes the 8500-8750{AA} interval currently base-lined for the spectroscopic...

A new non-linear limb-darkening law, based on the Least-Squares Method (LSM), is presented. This law is able to describe the intensity distribution much more accurately than any...

We present a study of helium rich atmospheres in the interval He/H 0.1-1.0 as derived from fully consistent model computations for effective temperature (from 15000K up to...

We present non-LTE corrections to abundances of Fe, O, Na, and Mg derived from LTE analyses of F-K stars over a broad range of gravities and metal abundances; they were obtained...

Linear and non-linear limb-darkening coefficients for the photometric bands u v b y U B V R I J H K are computed for very low effective temperatures stars. The atmosphere models...

The results of calculations of the sensitivity indicators to the temperature, as well as the average geometrical heights of localization of the effective response to the...

We discuss the effects of convection on the theoretical uvby colours of A, F, and G stars. The standard mixing-length theory atlas9 models of Kurucz (1993, ATLAS9, SAO,...

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The ELODIE interpolator is a service buil on top of the ELODIE library to generate a spectrum given the atmospheric parameters: Teff, log(g) and [Fe/H]. The...

TheoSSA provides spectral energy distributions based on model atmosphere calculations. Currently, we serve results obtained using the Tübingen NLTE Model Atmosphere Package...

TheoSSA provides spectral energy distributions based on model atmosphere calculations. Currently, we serve results obtained using the Tübingen NLTE Model Atmosphere Package...

The Tübingen NLTE Model-Atmosphere Package (TMAP <http://astro.uni-tuebingen.de/%7ETMAP/TMAP.html>_) is a tool to calculate stellar atmospheres in spherical or...

SP_ACE computes stellar parameters (gravity, temperature) and element abundances from optical stellar spectra (sample spectrum_). It employs 1D stellar atmosphere models in...

We present chromospheric CaII H and K activity measurements, rotation periods, and ages for ~1200 F, G, K, and M type main-sequence stars from ~18000 archival spectra taken at...

More than 800 southern stars within 50pc have been observed for chromospheric emission in the cores of the Ca II H and K lines. Most of the sample targets were selected to be G...

Knowing how the mass loss of carbon-rich AGB stars depends on stellar parameters is crucial for stellar evolution modelling, as well as for the understanding of when and how...