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Vii. New Kr IV - VII Oscillator Strengths and an Improved Spectral Analysis of the Hot, Hydrogen-deficient Do-type White Dwarf RE 0503-289For the spectral analysis of high-resolution and high signal-to-noise (SN) spectra of hot stars, state-of-the-art non-local thermodynamic equilibrium (NLTE) model atmospheres are mandatory. These are strongly dependent on the reliability of the atomic data that is used for their calculation. Aims. New Krivvii oscillator strengths for a large number of lines enable us to construct more detailed model atoms for our NLTEmodel-atmosphere calculations. This enables us to search for additional Kr lines in observed spectra and to improve Kr abundance determinations. Methods. We calculated Krivvii oscillator strengths to consider radiative and collisional bound-bound transitions in detail in our NLTE stellar-atmosphere models for the analysis of Kr lines that are exhibited in high-resolution and high SN ultraviolet (UV)observations of the hot white dwarf RE 0503.
Document ID
20170002528
Document Type
Reprint (Version printed in journal)
Authors
Rauch, T. (Eberhard Karls Universitat Tuebingen Tuebingen, Germany)
Quinet, P. (Mons Univ. Belgium)
Hoyer, D. (Eberhard Karls Universitat Tuebingen Tuebingen, Germany)
Werner, K. (Eberhard Karls Universitat Tuebingen Tuebingen, Germany)
Richter, P. (Potsdam Univ. Potsdam, Germany)
Kruk, J. W. (NASA Goddard Space Flight Center Greenbelt, MD United States)
Demleitner, M. (Heidelberg Univ. Heidelberg, Germany)
Date Acquired
March 23, 2017
Publication Date
May 27, 2016
Publication Information
Publication: Astronomy & Astrophysics
Volume: 590
ISSN: 0004-6361
Subject Category
Astrophysics
Report/Patent Number
GSFC-E-DAA-TN40447
Funding Number(s)
CONTRACT_GRANT: NAS5-26666
CONTRACT_GRANT: NNX09AF08G
Distribution Limits
Public
Copyright
Other