PoWR grids of non-LTE model atmospheres for OB-type stars of various metallicities

R. Hainich*, V. Ramachandran, T. Shenar, A. A.C. Sander, H. Todt, D. Gruner, L. M. Oskinova, W. R. Hamann

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

Abstract

The study of massive stars in different metallicity environments is a central topic of current stellar research. The spectral analysis of massive stars requires adequate model atmospheres. The computation of such models is difficult and time-consuming. Therefore, spectral analyses are greatly facilitated if they can refer to existing grids of models. Here we provide grids of model atmospheres for OB-type stars at metallicities corresponding to the Small and Large Magellanic Clouds, as well as to solar metallicity. In total, the grids comprise 785 individual models. The models were calculated using the state-of-the-art Potsdam Wolf-Rayet (PoWR) model atmosphere code. The parameter domain of the grids was set up using stellar evolution tracks. For all these models, we provide normalized and flux-calibrated spectra, spectral energy distributions, feedback parameters such as ionizing photons, Zanstra temperatures, and photometric magnitudes. The atmospheric structures (the density and temperature stratification) are available as well. All these data are publicly accessible through the PoWR website.

Original languageEnglish
Article numberA85
JournalAstronomy and Astrophysics
Volume621
DOIs
StatePublished - 1 Jan 2019
Externally publishedYes

Funding

FundersFunder number
Deutsche Akademische Austauschdienst
Deutsche ForschungsgemeinschaftHA 1455/26
Deutsches Zentrum für Luft- und Raumfahrt50 OR 1508, 50 OR 1612

    Keywords

    • Outflows
    • Radiative transfer
    • Stars: Atmospheres
    • Stars: Early-type
    • Stars: Mass-loss
    • Stars: Massive
    • Stars: winds

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