Theoretical study of the Stark broadening for Mg IV spectral lines of astrophysical interest

Andrés García, María Isabel de and You, Chaoyu and Alonso Medina, Aurelia and Colón Hernández, Cristóbal (2016). Theoretical study of the Stark broadening for Mg IV spectral lines of astrophysical interest. "Monthly Notices of the Royal Astronomical Society", v. 462 (n. 4); pp. 4220-4226. ISSN 0035-8711. https://doi.org/10.1093/mnras/stw1955.

Description

Title: Theoretical study of the Stark broadening for Mg IV spectral lines of astrophysical interest
Author/s:
  • Andrés García, María Isabel de
  • You, Chaoyu
  • Alonso Medina, Aurelia
  • Colón Hernández, Cristóbal
Item Type: Article
Título de Revista/Publicación: Monthly Notices of the Royal Astronomical Society
Date: November 2016
ISSN: 0035-8711
Volume: 462
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

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Abstract

Emission lines of Mg IV have been detected in the Far Ultraviolet Spectroscopic Explorer (FUSE) spectrum of LS V +46°21 star and in the Space Telescope Imaging Spectrograph (STIS) spectrum of BD +28°4211 star. This fact justifies our interest in providing spectroscopic parameters of Mg IV. Stark broadening parameters for 169 spectral lines of Mg IV have been calculated by using the Griem semi-empirical approach. The matrix elements used in these calculations has been determined from 13 configurations of Mg IV: 2s¹2p⁶, 2s²2p⁴ns (n=3–5), 2s²2p⁴nd (n=3–5) and 2s²2p⁴5g for even parity and 2s²2p⁵, 2s²2p⁴np (n=3,4) and 2s²2p⁴nf (n=4,5) for odd parity. Our calculations were made by using the Cowan code. Data are presented for an electron density of 10¹⁷ cmˉ³ and temperatures T=1.0–10.0 (10⁴ K). Also we present calculated values of transition probabilities for 30 spectral lines and radiative lifetimes corresponding to its upper levels. These values were analysed using the data found in the literature. Theoretical trends of the Stark broadening parameters versus the temperature for several lines of astrophysical interest are presented.

Funding Projects

TypeCodeAcronymLeaderTitle
Government of SpainMAT2012-37782UnspecifiedUnspecifiedAnálisis integrado teórico-experimental de la técnica LSP aplicada a la mejora de propiedades mecánicas y superficiales de componentes metálicos de alta fiabilidad

More information

Item ID: 56602
DC Identifier: http://oa.upm.es/56602/
OAI Identifier: oai:oa.upm.es:56602
DOI: 10.1093/mnras/stw1955
Official URL: https://academic.oup.com/mnras/article-abstract/462/4/4220/2589974?redirectedFrom=fulltext
Deposited by: Memoria Investigacion
Deposited on: 01 Oct 2019 07:47
Last Modified: 01 Oct 2019 07:47
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