The determination of photospheric abundances in late-type stars from spectroscopic observations is a well-established field, built on solid theoretical...
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PublicationSolar and stellar photospheric abundances
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TalkSounding the treasure trove - Asteroseismology of red-giant stars and binaries systems
Understanding stellar structure and evolution significantly impacts our understanding of the tight-knit evolution of galaxies and exoplanet systems. However...
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PublicationSpectral and radial velocity studies of 5 northern central stars of planetary nebulae
Spectrograms of five bright northern central stars of planetary nebulae (CSPN) are compiled in order to provide spectral descriptions of these stars, with...
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PublicationStellar atmospheres. Beyond classical models
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PublicationStellar Atmospheric Parameters: The Four-Step Program and Gaia's Radial Velocity Spectrometer
The determination of atmospheric parameters is the first and most fundamental step in the analysis of a stellar spectrum. Current and forthcoming surveys...
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PublicationThe Carbon Star DY Persei May Be a Cool R Coronae Borealis Variable
Optical and near-IR photometry suggests that the carbon star DY Persei exhibits fadings similar to those of R Coronae Borealis (RCB) variables. Photometric...
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PublicationThe Emergence of Magnetic Field into Stellar Atmospheres
The magnetic activity in the atmosphere of the Sun, possibly of most other magnetically active late-type stars, is a consequence of the emergence of magnetic...
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PublicationThe He I D3 5876 A line as an activity and structural indicator in F-type Hyades stars
The first results of a study of F-type MS stars using the He I D3 absorption feature at 5876 A as an indicator of stellar activity and structure are presented...
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PublicationThe mass and helium discrepancy in massive stars: the case Vela X-1.
A NLTE-analysis is presented of high S/N spectra of the optical component of the standard massive X-ray binary Vela X-1. In combination with the orbital...