Preliminary results of new high-resolution and S/N ratio spectra of central stars of planetary nebulae (CSPN) are presented. The atmospheric parameters (Teff...
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PublicationNLTE analysis of high-resolution spectra of CSPN
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PublicationObservation of a variable, ZZ Ceti white dwarf: GD154
The ZZ Ceti stars form a class of variable white dwarfs: the hydrogen dominated atmosphere ones, which do pulsate in an instability strip in the effective...
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PublicationOn the application of iteration factors for temperature correction in stellar atmospheres
The authors present an improved iterative method for deriving temperature corrections in stellar atmospheres. At each step of iteration, the procedure computes...
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PublicationOn the relation of the Duvall phase function to the upper layers on the convection zone
A method to obtain the Duvall phase function from the structure of a stellar model is presented. This can be a good tool for understanding the dependence of p...
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PublicationOxygen and magnesium abundance in the ultra-metal-poor giants CS 22949-037 and CS 29498-043: Challenges in models of atmospheres
We report the results of a non-LTE Fe, O and Mg abundance analysis of the carbon-nitrogen-rich ultra-metal-poor giants CS 29498-043 and CS 22949-037. The...
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PublicationPHL 932 - Another non-post-AGB central star of planetary nebula
The very high surface gravity and low temperature of PHL 932, a hot subluminous star surrounded by a planetary nebula, imply that it cannot be a post-AGB star...
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PublicationProgress in stellar spectral line formation theory; Proceedings of the Advanced Research Workshop, Trieste, Italy, September 4-7, 1984
Papers on stellar spectral line formation theory are presented. The general topics considered include: frequency redistribution problems in line formation...
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PublicationSelf-consistent models for Coulomb heated X-ray pulsar atmospheres
Calculations of accreting magnetized neutron star atmospheres heated by the gradual deceleration of protons via Coulomb collisions are presented. Self...
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PublicationShock wave propagation in a magnetic flux tube
The propagation of a shock wave in a magnetic flux tube is studied within the framework of the Brinkley-Kirkwood theory adapted to a radiating gas. Simplified...