The STARK-B database as a resource for “STARK” widths and shifts data: State of advancement and program of development

Sahal‐Bréchot, S.; Dimitrijević, M. S.; Moreau, N.; Nessib, N. Ben

doi:10.1016/j.asr.2013.08.015

Cited by 13 publications

(11 citation statements)

References 26 publications

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“…These results cover the regions 2 ≤ n ≤ 20 and 4000 K < T ≤ 20000 K which are relevant for moderately ionized plasma layers in different environments. In order to allow for a faster usage of the calculated results we provide a fit to numerical results of the form (Sahal-Bréchot et al, 2014) log (K ci,cr…”

Section: Resultsmentioning

confidence: 99%

The influence of collisional-ionization and recombination processes on spectral line shapes in stellar atmospheres and in the hydrogen clouds in broad-line region of AGNs

Srećković¹,

Dimitrijević²,

Ignjatović³

2020

caosp

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In this paper, the importance of H * (n) + H(1s) collisional ionization as well as the influence of inverse recombination processes in different environments has been investigated within the regions 2 ≤ n ≤ 20 and 4 000 K ≤ T ≤ 20 000 K. The interpretation of this influence is based on existing method of describing inelastic processes in symmetrical atomRydberg-atom collisions. These processes have effect on ionization and the populations of hydrogen excited atoms in moderately ionized plasma layers. From the results it follows that the investigation of these processes is of interest for the research and modelling of such medium.

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Section: Resultsmentioning

confidence: 99%

The influence of collisional-ionization and recombination processes on spectral line shapes in stellar atmospheres and in the hydrogen clouds in broad-line region of AGNs

Srećković¹,

Dimitrijević²,

Ignjatović³

2020

caosp

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“…MSE data discussed here, as with SCP data, are continuously implemented in the STARK-B database [6][7][8]170,171] and are available online. STARK-B is also a part of the Virtual Atomic and Molecular Data Center (VAMDC) [172,173] and may be accessed through its portal [174].…”

Section: Discussionmentioning

confidence: 99%

Forty Years of the Applications of Stark Broadening Data Determined with the Modified Semiempirical Method

Dimitrijević

2020

Data

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The aim of this paper is to analyze the various uses of Stark broadening data for non-hydrogenic lines emitted from plasma, obtained with the modified semiempirical method formulated 40 years ago (1980), which are continuously implemented in the STARK-B database. In such a way one can identify research fields where they are applied and better see the needs of users in order to better plan future work. This is done by analysis of citations of the modified semiempirical method and the corresponding data in international scientific journals, excluding cases when they are used for comparison with other experimental or theoretical Stark broadening data or for development of the theory of Stark broadening. On the basis of our analysis, one can conclude that the principal applications of such data are in astronomy (white dwarfs, A and B stars, and opacity), investigations of laser produced plasmas, laser design and optimization and their applications in industry and technology (ablation, laser melting, deposition, plasma during electrolytic oxidation, laser micro sintering), as well as for the determination of radiative properties of various plasmas, plasma diagnostics, and investigations of regularities and systematic trends of Stark broadening parameters.

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“…We have found theoretical values calculated by other authors: four theoretical values for four Mg IV multiplets (Dimitrijević 1988). These values were calculated by using the Modified Semiempirical Method (MSE) by Sahal-Bréchot et al (2014) and are included in the STARK-B Database (2013). Our results for several temperatures compared with MSE data for Stark Broadening of 1683.00 Å spectral line are displayed in Fig.…”

Section: R E S U Lt S a N D Discussionmentioning

confidence: 99%

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

Andrés-García¹,

You²,

Alonso‐Medina³

et al. 2016

Mon. Not. R. Astron. Soc.

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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: 2s 1 2p 6 , 2s 2 2p 4 ns (n = 3-5), 2s 2 2p 4 nd (n = 3-5) and 2s 2 2p 4 5g for even parity and 2s 2 2p 5 , 2s 2 2p 4 np (n = 3, 4) and 2s 2 2p 4 nf (n = 4, 5) for odd parity. Our calculations were made by using the Cowan code. Data are presented for an electron density of 10 17 cm −3 and temperatures T = 1.0-10.0 (10 4 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.

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The STARK-B database as a resource for “STARK” widths and shifts data: State of advancement and program of development

Cited by 13 publications

References 26 publications

The influence of collisional-ionization and recombination processes on spectral line shapes in stellar atmospheres and in the hydrogen clouds in broad-line region of AGNs

The influence of collisional-ionization and recombination processes on spectral line shapes in stellar atmospheres and in the hydrogen clouds in broad-line region of AGNs

Forty Years of the Applications of Stark Broadening Data Determined with the Modified Semiempirical Method

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

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