Preliminary results of new high-resolution and S/N ratio spectra of central stars of planetary nebulae (CSPN) are presented. The atmospheric parameters (Teff...
NLTE analysis of massive OB stars in open clusters
The paper presents a new method for deriving stellar masses and distances using the theory of radiatively driven winds as presented by Kudritzki et al. (1989)...
NLTE Effects in formation of variable Mn I 539.4 nm line in solar spectrum
On the basis of NLTE profile calculations obtained by employing the radiative transfer code MULTI, the influence of the uncertainties of various parameters...
No direct coupling between bending of galaxy disc stellar age and light profiles as seen from CALIFA
Recent theoretical and observational works claim the existence of galaxies with a characteristic age profile consisting on a negative radial trend followed by a...