Astrophysical: Stellar evolution

  • Publication
    A 4 Gyr M-dwarf Gyrochrone from CFHT/MegaPrime Monitoring of the Open Cluster M67
    We present stellar rotation periods for late K- and early M-dwarf members of the 4 Gyr old open cluster M67 as calibrators for gyrochronology and tests of...
  • Publication
    A New Class of Roche Lobe-filling Hot Subdwarf Binaries
    We present the discovery of the second binary with a Roche lobe-filling hot subdwarf transferring mass to a white dwarf (WD) companion. This 56 minute binary...
  • Publication
    A new proto-planetary nebula
    Low and high resolution spectra of IRAS 22568 + 6141 have been obtained. Physical parameters and abundances and flux densities are given for the object. The...
  • Publication
    A spectrophotometric study of the peculiar young open cluster Berkeley 87
    A spectrophotometric study of the peculiar open cluster Berkeley 87 is presented; the measurements show that most of the members are young, heavily reddened OB...
  • Publication
    Absolute parameter determination in low-mass eclipsing binaries - Radiative parameters for BH Vir, ZZ UMA and CR CAS
    A new uvby and H-beta monitoring program of low mass eclipsing binaries is currently being carried out in the framework of a 5-yr observational program which...
  • Publication
    Abundance gradient for 13 planetary nebulae in the Galaxy
    Via optical low-resolution long slit spectroscopy conducted at the 2.5 m INT in La Palma, He, O, N, Ne, A, and S abundances in 13 extended PN were calculated...
  • Publication
    An empirical approach to the location of the theoretical isochrones in the observational plane
    A new empirical calibration of the (B-V) index versus the three fundamental stellar parameters T(eff), (Fe/H), and log g is presented whose range of validity is...
  • Publication
    An improved evolutionary model for stellar population applied to NGC 2903
    The revised physical assumptions incorporated into a previously published evolutionary model for stellar population synthesis in galaxies (Casuso et al., 1989)...
  • Publication
    Asteroseismology and Spectropolarimetry of the Exoplanet Host Star λ Serpentis
    The bright star λ Ser hosts a hot Neptune with a minimum mass of 13.6 M ⊕ and a 15.5 day orbit. It also appears to be a solar analog, with a mean rotation...