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Round Table Summary: Comparison of Different NLTE Codes and the Role of Atomic Input Data

Published online by Cambridge University Press:  26 May 2016

Inga Kamp ,
Sergey Korotin ,
Lyudmila Mashonkina ,
Norbert Przybilla  and
Slava Shimansky
Inga Kamp
Affiliation:
Leiden Observatory, PO Box 9513, 2300 RA Leiden, The Netherlands
Sergey Korotin
Affiliation:
Department of Astronomy, Odessa State University, Shevchenko Park, 65014 Odessa
Lyudmila Mashonkina
Affiliation:
Astronomy Department, Kazan State University, Kremlevskaya 18, 420008 Kazan, 420008 Russia
Norbert Przybilla
Affiliation:
Universitäts-Sternwarte München, Scheinerstr. 1, 81679 München, Germany
Slava Shimansky
Affiliation:
Department of Astronomy, Kazan State University, Kremlevskaya 18, 420008 Kazan, Russia

Abstract

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We started a comparison between different NLTE codes that calculate the statistical equilibrium in solar-type and late type stars (G - A type stars). Discrepancies between different authors analyzing the statistical equilibrium of the same element in the same atmosphere are often surprisingly large. Hence, this study was meant to nail down the origin of these differences. The preliminary results indicate that even if the atmosphere and the atomic input data is fixed, discrepancies of up to 40% in the outer atmospheric layers are still present; the main reason is the different treatment of the background opacity. Following up, we shortly discuss the completeness and accuracy of atomic data used in analyses of the kinetic equilibrium of atoms in the atmospheres of middle and late type stars.

Type
Session E. Comparison with Observations
Information
Symposium - International Astronomical Union , Volume 210: Modelling of Stellar Atmospheres , 2003 , pp. 323 - 336
Copyright
Copyright © Astronomical Society of the Pacific 2003 

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