Papers by Milan S Dimitrijevic
AIP Conference Proceedings, 2025
The importance of Stark broadening parameters of ionized gallium spectral lines for astrophysical... more The importance of Stark broadening parameters of ionized gallium spectral lines for astrophysical applications is discussed. Recently obtained calculated results for Ga II lines in the UV, visible and IR spectrum are analyzed. The interactions between gallium ions and surrounding particles are examined.
Data, 2025
Data on spectral line widths and shifts broadened by interactions with charged particles, for 44 ... more Data on spectral line widths and shifts broadened by interactions with charged particles, for 44 lines in the spectrum of ionized tin, for collisions with electrons and H II and HeII ions, are presented as online available tables. We obtained them by employing the semiclassical perturbation theory for temperatures, T, within the 5000-100,000 K range, and for a grid of perturber densities from 10 14 cm-3 to 10 20 cm-3. The presented Stark broadening data are of interest for the analysis and synthesis of ionized tin lines in the spectra of hot and dense stars, such as, for example, for white dwarfs and hot subwarfs, and for the modelling of their atmospheres. They are also useful for the diagnostics of laser-induced plasmas for high-order harmonics generation in ablated materials.
Monthly Notices of the Royal Astronomical Society, Aug 12, 2021
Stark broadening parameters, full widths at half intensity maximum, and shifts for 34 multiplets ... more Stark broadening parameters, full widths at half intensity maximum, and shifts for 34 multiplets of singly charged zinc ion have been calculated using the impact semiclassical perturbation formalism. Stark broadening parameters due to collisions with electrons, protons, and helium ions have been obtained for a grid of electron densities and temperatures. The obtained results have been used to demonstrate the influence of Stark broadening mechanism on spectral lines of Zn II in stellar atmospheres.
Stark broadening of Fe XXV spectral lines
Monthly Notices of the Royal Astronomical Society
Stark broadening parameters, full widths at half intensity maximum and shifts for 18 spectral lin... more Stark broadening parameters, full widths at half intensity maximum and shifts for 18 spectral lines of Fe XXV, broadened by collisions with electrons, protons and Fe XXVII ions, have been calculated using the impact semiclassical perturbation formalism, for a grid of electron densities and temperatures of interest for neutron star atmospheres and their environment.
Astronomical Motives in Christian art
Romanian Astronomical Journal, 2015
In the Christian iconography, there are motives that point to their astronomical origin (e.g. ico... more In the Christian iconography, there are motives that point to their astronomical origin (e.g. iconography of St. Elias, Archangel Michail, description of Armageddon and Apocalypse...). According to the motives that are present in stories and iconography of St. Elias, it is possible that this myth originated in much earlier times than the times when the Old Testament was written. Mentioning of the bull sacrificing could mean that it originated in the epoch from fourth to second millennium B.C., and that it is connected to the catastrophic event caused by fall of a celestial body.
Nuclear Technology and Radiation Protection, 2017
On the basis of calculated values for the conductivity in an external electric field, we determin... more On the basis of calculated values for the conductivity in an external electric field, we determined the high-frequency characteristics of plasmas under extreme conditions (e. g. dense plasma focus device). The examined range of frequencies covers the IR, visible, UV, XUV up to X regions and the considered electronic number density and temperature are in the ranges of 1021 cm-3 ? Ne ? 5?1024 cm-3 and 2?104 K ? T ? 106 K, respectively. The data obtained using this method are important for plasma focus research, laboratory plasma research, investigation of atmosphere plasmas of astrophysical objects like white dwarfs with different atmospheric compositions.
Sundials: cultural heritage objects as proofs of Anaximander's astronomical knowledge
Romanian Astronomical Journal, 2020
Here are discussed ideas and philosophical views of Anaximander of Miletus (611/610-547/546 B.C.)... more Here are discussed ideas and philosophical views of Anaximander of Miletus (611/610-547/546 B.C.), one of the most important Pre-Socratic philosophers, the first who tried to give a scientific view of the World, free from mythology, about the nature of celestial bodies and Earth's position in the Universe, and his contribution to practical astronomy and introduction of sundials in Greek world.
Atom-Rydberg atom processes in the stellar atmospheres: DB white-dwarf atmospheres and solar atmosphere
Astronomical & Astrophysical Transactions, 2018
Zr II & III electron-impact broadening parameters
ABSTRACT The electron-impact widths for 30 Zr III lines were calculated using the modified semi-e... more ABSTRACT The electron-impact widths for 30 Zr III lines were calculated using the modified semi-empirical (MSE) method. For two Zr II and four Zr III astrophysically important UV lines, only electron-impact widths are given, since for their calculation the experimental oscillator strengths were used and consequently the accuracy of the parameters is lower than in the case of other lines. The influence of the electron-impact mechanism on line shapes and equivalent widths in hot star atmospheres was also considered. The impact of the electron-impact broadening effect on abundance determination, particularly its effect on "zirconium conflict" is discussed as well. (2 data files).
The Nestorian Christian monk Cosmas the ”Indicopleustes”, wrote in 6th century the Christian Topo... more The Nestorian Christian monk Cosmas the ”Indicopleustes”, wrote in 6th century the Christian Topography, a work through which he attempted to create a new system of geography and the representation of the World that would fit to the information contained in the Holy Scripture. His work and life, and his model of the Universum, are considered here.
As a continuation of the previous investigations of the symmetric and strongly non-symmetric ion-... more As a continuation of the previous investigations of the symmetric and strongly non-symmetric ion-atom absorption processes within the models of the quiet Sun photosphere, we studied these processes within a model of the sunspots in the far-UV region. We considered the processes of the photodissociation of the H2 and HM + molecular ions and absorption processes in the H(1s)+H and H(1s) + M collisions, where M is one of the metal atoms: M = Na, Ca, Mg, Si and Al. The significance of these processes in far UV and EUV regions in comparison with the concurrent absorption processes, especially with the processes of the photo-ionization of the metal atoms (Na, Mg, Ca, Al, Fe, etc.) was analyzed. Calculated results show that the influence of the analyzed ion-atom absorption processes on the opacity of sunspots in the considered spectral region, 100 nm ≤ λ ≤ 250 nm, is not less and in some parts even larger than the influence of the referent electron-atom processes. It is shown that the cons...
Atoms, Dec 1, 2017
Regularities and systematic trends among the Stark widths of 18 Zr IV spectral lines obtained by ... more Regularities and systematic trends among the Stark widths of 18 Zr IV spectral lines obtained by modified semiempirical approach have been discussed. Also we compared those calculated Stark broadening parameters with estimates according to Cowley, Purić et al. and Purić and Šćepanović and checked the possibility to find some new estimates. It is demonstrated as well that the formula of overestimates Stark widths, obtained by using modified semiempirical method, with the increase of angular orbital momentum quantum number due to its neglection. It is also found that the results obtained by using formula for simple estimates of are in agreement with the modified semiempirical results within the estimated error bars of both methods, while the estimates using formula of are in strong disagreement which increases with the increase of angular orbital momentum quantum number.
Journal of Physics: Conference Series, 2017
Stark broadening parameters for Cr VI lines have been calculated using semiclassical perturbation... more Stark broadening parameters for Cr VI lines have been calculated using semiclassical perturbation method for conditions of interest for stellar plasma. Here are presented, as an example of obtained results, Stark broadening parameters for electron- and proton-impact broadening for Cr VI 4s 2S-4p 2P° λ = 1430 A and Cr VI 4p 2P°-5s 2S λ = 611.8 A multiplets. The obtained results are used to demonstrate the importance of Stark broadening of Cr VI in DO white dwarf atmospheres. Also the obtained results will enter in STARK-B database which is included in Virtual Atomic and Molecula Data Center - VAMDC.
Iron lines in Sy1 galaxies - correlations with UV/optical spectral properties
Publications of Astronomical Observatory of Bečlgrade, 1999
Publications of the Astronomical Society "Rudjer Bošković", 2005
We have calculated within the semiclassical perturbation theory Stark broadening parameters (widt... more We have calculated within the semiclassical perturbation theory Stark broadening parameters (width and shift) for 13 Cd I multiplets in UV and V, and for 24 multiplets in infrared spectral ranges, for temperatures between 2500 K and 50000 K, of interest for stellar plasma investigations.
Electron-impact broadening of ionized chromium lines for Ap star atmospheres analysis
The influence of Stark broadening on the shapes of Cr II spectral lines observed in stellar atmos... more The influence of Stark broadening on the shapes of Cr II spectral lines observed in stellar atmospheres is considered.
Proceedings of the 12th International Conference on Computer Systems and Technologies - CompSysTech '11, 2011
The development of space born astronomy, providing a huge amount of high quality astronomical dat... more The development of space born astronomy, providing a huge amount of high quality astronomical data created an information avalanche and leaded to the formation of huge data collections. In order to address the problem how to analyse such amount of data, the idea of Virtual Observatory was formulated at the end of 2000, and from 2001 the FP5 project Astrophysical
Serbian Astronomical Journal, 1998
Using a semiclassical approach, we have calculated electron?, proton?, and He III?impact line wid... more Using a semiclassical approach, we have calculated electron?, proton?, and He III?impact line widths and shifts for 4 K VIII and 30 K IX multiplets as a function of temperature and perturber density.
Serbian Astronomical Journal, 1998
Using a semiclassical approach, we have calculated electron?, proton?, and He III?impact line wid... more Using a semiclassical approach, we have calculated electron?, proton?, and He III?impact line widths and shifts for 2 F VI and 10 Cl VII multiplets as a function of temperature and perturber density.
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Papers by Milan S Dimitrijevic
Papers presented at the 2021 Conference of the Romanian Society for Cultural Astronomy.
Churches. In Serbian delegation were Metropolitan of Montenegro and Coast Gavrilo Dožić, who later become Patriarch of Serbian Orthodox Church, and Milutin Milanković. They came on the Congress with the proposition of calendar reform which author was Maksim Trpković. Serbian proposition was rejected by Congress as inconvenient and Milutin Milanković obtained task to elaborate a new one. In this contribution is discussed this calendar reform, its implementation in Orthodox churches and present state.