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Quantitative spectroscopy of hot stars: accurate atomic data applied on a large scale as driver of recent breakthroughs

Published online by Cambridge University Press:  27 October 2016

N. Przybilla ,
V. Schaffenroth ,
M. F. Nieva  and
K. Butler
N. Przybilla
Affiliation:
Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25/8, A-6020 Innsbruck, Austria email: [email protected], [email protected], [email protected]
V. Schaffenroth
Affiliation:
Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25/8, A-6020 Innsbruck, Austria email: [email protected], [email protected], [email protected]
M. F. Nieva
Affiliation:
Institut für Astro- und Teilchenphysik, Universität Innsbruck, Technikerstr. 25/8, A-6020 Innsbruck, Austria email: [email protected], [email protected], [email protected]
K. Butler
Affiliation:
Universitäts-Sternwarte München, Scheinerstr. 1, D-81679 München, [email protected]
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Abstract

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OB-type stars present hotbeds for non-LTE physics because of their strong radiation fields that drive the atmospheric plasma out of local thermodynamic equilibrium. We report on recent breakthroughs in the quantitative analysis of the optical and UV-spectra of OB-type stars that were facilitated by application of accurate and precise atomic data on a large scale. An astrophysicist's dream has come true, by bringing observed and model spectra into close match over wide parts of the observed wavelength ranges. This allows tight observational constraints to be derived from OB-type stars for a wide range of applications in astrophysics. However, despite the progress made, many details of the modelling may be improved further. We discuss atomic data needs in terms of laboratory measurements and also ab-initio calculations. Particular emphasis is given to quantitative spectroscopy in the near-IR, which will be the focus in the era of the upcoming extremely large telescopes.

Keywords

atomic dataradiative transferstars: abundancesstars: atmospheresstars: early-typestars: fundamental parameters
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , General Assembly A29A: Astronomy in Focus , August 2015 , pp. 297 - 298
Copyright
Copyright © International Astronomical Union 2016 

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