Memorias de investigación
Research Publications in journals:
Theoretical transition probabilities, radiative lifetimes and Stark broadening parameters of singly ionized magnesium
Year:2019

Research Areas
  • Physics - Atomic and molecular physics,
  • Engineering

Information
Abstract
The presence of spectral lines of singly ionized magnesium (Mg II) in stellar atmospheres has been reported in different stars. Recently, the low-resolution spectrum obtained from Supernova 2014 J in M82, in which Mg II absorption lines centred on 4400Å as well as 7600Å stand out, has been analysed. This is the motive for the atomic data calculations in this work, which are of much interest in the astrophysical area. In this article, ab initio relativistic Hartree?Fock calculations in an intermediate coupling formalism using Cowan?s code allowed us to obtain the required transition probabilities to calculate the theoretical radiative lifetimes for excited nS?, nP?, nD? and nF? states of singly ionized magnesium. An asymptotic dependence of lifetime (? nl) on the effective principal quantum number (n?) has been determined. Also, the Griem semi-empirical approach was used to obtain the theoretical Stark parameters (width and shift) of spectral lines; these data are displayed for an electron density of 1017 cm?3 and temperatures T = 10?100 (×103 K). We have compared the results of lifetimes for 16 levels and Stark parameters for seven spectral lines with previously reported experiments available in the literature. Finally,we discuss the behaviour of the Stark parameters versus temperature for three relevant spectral lines (2802.70, 2797.99 and 7868.04 Å).
International
Si
JCR
Si
Title
Mon. Not. Roy. Astron. Soc
ISBN
0035-8711
Impact factor JCR
Impact info
Volume
490
10.1093/mnras/stz2744
Journal number
From page
1734
To page
1737
Month
JULIO
Ranking
Participants

Research Group, Departaments and Institutes related
  • Creador: Departamento: Ingeniería Eléctrica, Electrónica Automática y Física Aplicada