Astrofísicas: Evolución estelar

  • Publicación
    Infrared observations of H II regions - S128 and G134.2+0.8 (GL 333)
    Observations of S128 and G134.2+0.8, two active star forming H II regions, are reported. The exciting stars in both are probably detected and identified. In...
  • Publicación
    Infrared studies of Seyfert galaxies and of the irregular galaxy M 82
    Middle and far infrared studies of the irregular galaxy M 82 and of Seyfert galaxies are presented. M 82 was observed spectrophotometrically from 8 to 13...
  • Publicación
    Infrared variability of symbiotic stars
    Binary models of symbiotic stars are discussed, analyzing the results of recent IR observations. It is indicated that a binary must have component masses of...
  • Publicación
    Intrinsic parameters of galactic luminous OB stars
    We present the results of a spectroscopic analysis of 25 galactic luminous OB stars. The gravities are in general lower than previously assumed, especially for...
  • Publicación
    IRAS 17423-1755: A BQ() star with a variable velocity outflow
    Infrared Astronomy Satellite (IRAS) 17423-1755 has been identified as a BQ() star. Its more remarkable observed features are large radial velocities, huge line...
  • Publicación
    Lithium abundances in metal-deficient dwarfs
    New measurements of the lithium abundance in a sample of 37 field dwarfs of low metallicity (-0.6 ≥ [Fe/H] ≥ 3.2) are presented. Combining these observations...
  • Publicación
    Lithium in T Tauri stars
    The lithium abundance in 26 T Tauri stars is derived using data taken at the Isaac Newton Telescope and data from literature. The aim is to understand the...
  • Charla
    Living with a red dwarf: X-ray and UV emissions of red dwarf stars and effects on hosted planets and their suitability for life
    Red Dwarf (dM) stars are the most numerous stars in our Galaxy. These faint, cool, long-lived, and low mass stars make up > 80% of all stars in the Universe...
  • Publicación
    Magnetic and Rotational Evolution of ρ CrB from Asteroseismology with TESS
    During the first half of main-sequence lifetimes, the evolution of rotation and magnetic activity in solar-type stars appears to be strongly coupled. Recent...