Astrophysical: Stellar evolution

  • Publication
    The galactic globular cluster system - Constraints from Synthetic Horizontal Branches
    Synthetic horizontal branches, constructed on the basis of Sweigart and Gross (1976) horizontal branch star models and of the recently revised theoretical...
  • Publication
    The Galactic globular cluster system - Theoretical constraints for alpha-enhanced compositions
    This paper discusses synthetic horizontal branches constructed from a grid of horizontal-branch (HB) evolutionary tracks with the alpha-elements enhanced by a...
  • Publication
    The GW Vir Instability Strip in Light of New Observations of PG 1159 Stars: Discovery of Pulsations in the Central Star of A72 and Variability of RX J0122.9-7521
    We present the results of new time-series photometric observations of 29 pre-white dwarf stars of PG 1159 spectral type, carried out in the years 2014-2022. For...
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    The impact of supernova fragments on the evolution of multisupernova remnants
    Analytical approximations and 2D hydrodynamical simulations are used to examine the interaction of supernova fragments with the internal structure of large...
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    The influence of internal gravity waves on the light elements depletion among F-type stars
    It is proposed that the Li abundances in F-type stars can be affected by the weak mixing generated by internal gravity waves since the absence of Li is so...
  • Publication
    The intermediate age open cluster NGC 7044
    A photometric analysis is conducted of the open cluster NGC 7044, on the basis of UBVR CCD observations of 896 stars in the cluster field. Reddening and...
  • Publication
    The Isaac Newton Telescope Monitoring Survey of Local Group Dwarf Galaxies. I. Survey Overview and First Results for Andromeda I
    An optical monitoring survey in nearby dwarf galaxies was carried out with the 2.5 m Isaac Newton Telescope. Fifty-five dwarf galaxies and four isolated...
  • Publication
    The 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...
  • Publication
    The Missing Link? Discovery of Pulsations in the Nitrogen-rich PG 1159 Star PG 1144+005
    Up to 98% of all single stars will eventually become white dwarfs-stars that link the history and future evolution of the Galaxy, and whose previous evolution...