11 citations · 14 across the 7 of their papers we have counts for
7 papers
Physical alternative to the dark energy paradigm
Arved Sapar
The physical nature of the presently dominating enigmatic dark energy in the expanding universe is demonstrated to be explainable as an excess of the kinetic energy with respect to…
SMART - a computer program for modelling stellar atmospheres
Anna Aret, Arved Sapar, Raivo Poolamäe +1
Program SMART (Spectra and Model Atmospheres by Radiative Transfer) has been composed for modelling atmospheres and spectra of hot stars (O, B and A spectral classes) and studying…
Modelling of mercury isotope separation in CP stellar atmospheres: results and problems
A. Sapar, A. Aret, L. Sapar +1
Formation of anomalous isotope abundances in the atmospheres of chemically peculiar (CP) stars can be explained by light-induced drift (LID). This effect is additional to the radia…
Segregation of isotopes of heavy metals due to light-induced drift: results and problems
A. Sapar, A. Aret, R. Poolamäe +1
Atutov and Shalagin (1988) proposed light-induced drift (LID) as a physically well understandable mechanism to explain the formation of isotopic anomalies observed in CP stars. We…
Formulae for study of LID induced diffusion in CP star model atmospheres
A. Sapar, A. Aret, L. Sapar +1
Formulae suitable for computing light-induced drift (LID) acceleration and corresponding diffusional segregation of isotopes in CP star model atmospheres are given.
A Pan-Spectral Method of Abundance Determination
A. Sapar, A. Aret, L. Sapar +1
We propose a new method for determination of element abundances in stellar atmospheres aimed for the automatic processing of high-quality stellar spectra. The pan-spectral method i…
Particle diffusion in atmospheres of CP stars
A. Aret, A. Sapar
We give concisely the formulae governing diffusion of chemical elements and their isotopes in quiescent stellar atmospheres, due to electrostatic, gravitational and radiation field…