VAMDC FP7 project and STARK-B database: C II Stark broadening parameters for white dwarf atmospheres research

Journal Article · Tue Nov 23 00:00:00 EST 2010 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3527856· OSTI ID:21506940

Larbi-Terzi, Neila; Ben Nessib, Nebil ^[1]; Sahal-Brechot, Sylvie ^[2]; Dimitrijevic, Milan S ^[3]

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1. Groupe de Recherche en Physique Atomique et Astrophysique, Institut National des Sciences Appliquees et de Technologie, University of 7 November at Carthage, Centre Urbain Nord B. P. No. 676, 1080 Tunis Cedex (Tunisia)
2. Laboratoire d'Etude du Rayonnement et de la Matiere en Astrophysique, Observatoire de Paris-Meudon, UMR CNRS 8112, Batiment 18, 5 Place Jules Janssen, F-92195 Meudon Cedex (France)
3. Astronomical Observatory, Volgina 7, 11060 Belgrade 38 (Serbia)

Stark broadening parameters of C II lines were determined within 3s-np spectral series within the semiclassical perturbation method. The atomic energy levels needed for calculations were taken from TOPBASE as well as the oscillator strengths, calculated additionally using the Coulomb approximation (the method of Bates and Damgaard). The both results were compared and the disagreement is found only in one case where the configuration mixing allows a forbidden transition to a close perturbing energy level. Calculations were performed for plasma conditions relevant for atmospheres of DQ white dwarfs and for a new type of white dwarfs, with surface composed mostly of carbon, discovered in 2007 by Dufour et al.. The aim of this work is to provide accurate C II Stark broadening data, which are crucial for this type of white dwarf atmosphere modellisation. Obtained results will be included in STARK-B database (http://stark-b.obspm.fr/), entering in the FP7 project of European Virtual Atomic and Molecular Data Center VAMDC aiming at building an interoperable e-Infrastructure for the exchange of atomic and molecular data (http://www.vamdc.org/).

• OSTI ID: 21506940
• Journal Information: AIP Conference Proceedings, Vol. 1273, Issue 1; Conference: 17. European white dwarf workshop, Tubingen (Germany), 16-20 Aug 2010; Other Information: DOI: 10.1063/1.3527856; (c) 2010 American Institute of Physics; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

74 ATOMIC AND MOLECULAR PHYSICS
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ATMOSPHERES
COMPUTERIZED SIMULATION
CONFIGURATION MIXING
DATA PROCESSING
DISTURBANCES
ELECTRON DENSITY
ENERGY LEVELS
FORBIDDEN TRANSITIONS
NUCLEAR ENERGY
OSCILLATOR STRENGTHS
PERTURBATION THEORY
SEMICLASSICAL APPROXIMATION
SPECTRA
STARK EFFECT
SURFACES
WHITE DWARF STARS
APPROXIMATIONS
CALCULATION METHODS
DWARF STARS
ENERGY
ENERGY-LEVEL TRANSITIONS
INTERACTIONS
PROCESSING
SIMULATION
STARS