Stark broadening of several Bi IV spectral lines of astrophysical interest

Colón Hernández, Cristóbal and Moreno Díaz, Cristina and Andrés García, María Isabel de and Alonso Medina, Aurelia (2017). Stark broadening of several Bi IV spectral lines of astrophysical interest. "Monthly Notices of the Royal Astronomical Society", v. 470 (n. 2); pp. 2179-2189. ISSN 0035-8711. https://doi.org/10.1093/mnras/stx1320.

Description

Title: Stark broadening of several Bi IV spectral lines of astrophysical interest
Author/s:
  • Colón Hernández, Cristóbal
  • Moreno Díaz, Cristina
  • Andrés García, María Isabel de
  • Alonso Medina, Aurelia
Item Type: Article
Título de Revista/Publicación: Monthly Notices of the Royal Astronomical Society
Date: September 2017
ISSN: 0035-8711
Volume: 470
Subjects:
Freetext Keywords: Atomic data; Atomic processes
Faculty: E.T.S.I. Diseño Industrial (UPM)
Department: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada
Creative Commons Licenses: Recognition - No derivative works - Non commercial

Full text

[img]
Preview
PDF - Requires a PDF viewer, such as GSview, Xpdf or Adobe Acrobat Reader
Download (662kB) | Preview

Abstract

The presence of spectral lines of bismuth in stellar atmospheres has been reported in different stars. The anomalous values of the spectral intensities of Bi II and Bi III, compared to the theoretical Local Termodinamic Equilibrium (LTE) standards of Bi I/Bi II/Bi III, have been reported in the spectra obtained with the High Resolution Spectrograph of the Hubble/Goddard Space Telescope in the chemically peculiar stars HgMn stars χ Lupi and HR 7775. Spectral lines of 1436.8, 1902.3, 2630.9 and 2936.7 Å of Bi II and 1423.4 Å of Bi III were reported and their relative intensities were measured in these studies Litzén & Wahlgren 2002. These lines are overlapped with spectral lines of 1437.65, 2630.1 and 2937.1 Å of Bi IV. A study of the Stark broadening parameters of Bi IV spectral lines can help to study these overlaps. In this paper, using the Griem semi-empirical approach, we report calculated values of the Stark parameters for 64 spectral lines of Bi IV. The matrix elements used in these calculations have been determined from 17 configurations of Bi IV. They were calculated using the COWAN code including core polarization effects. Data are displayed for an electron density of 10¹⁷ cmˉ³ and temperatures T=10 000–160 000 K. Also calculated radiative lifetimes for 12 levels with experimental lifetime are presented, in order to test the goodness of our calculations. Theoretical trends of the Stark width and shift parameters versus the temperature for spectral lines of astrophysical interest are displayed.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT-2015-63974-C4-2-RUnspecifiedUnspecifiedTratamiento mediante LSP de aleaciones de magnesio biodegradables y bioreabsorbibles como método de mejora de sus propiedades mecánicas

More information

Item ID: 56589
DC Identifier: http://oa.upm.es/56589/
OAI Identifier: oai:oa.upm.es:56589
DOI: 10.1093/mnras/stx1320
Official URL: https://academic.oup.com/mnras/article-abstract/470/2/2179/3858480?redirectedFrom=fulltext
Deposited by: Memoria Investigacion
Deposited on: 30 Sep 2019 08:05
Last Modified: 30 Sep 2019 08:05
  • Logo InvestigaM (UPM)
  • Logo GEOUP4
  • Logo Open Access
  • Open Access
  • Logo Sherpa/Romeo
    Check whether the anglo-saxon journal in which you have published an article allows you to also publish it under open access.
  • Logo Dulcinea
    Check whether the spanish journal in which you have published an article allows you to also publish it under open access.
  • Logo de Recolecta
  • Logo del Observatorio I+D+i UPM
  • Logo de OpenCourseWare UPM