Astrofísicas: Estrellas gigantes rojas

  • Publicación
    Acoustic oscillations in the K2 III star Arcturus

    Simultaneous spectrometric and photometric observations have been performed on the red giant star Arcturus, in a search for radial velocity or luminosity...

  • Publicación
    An Intermediate-age Alpha-rich Galactic Population in K2

    We explore the relationships between the chemistry, ages, and locations of stars in the Galaxy using asteroseismic data from the K2 mission and spectroscopic...

  • Publicación
    Application of the infrared flux method to globular cluster stars. The M 3 giant branch

    The authors present optical and near infrared photometry, covering from 0.36 to 2.3 microns, for a wide sample of red giant stars in the globular cluster M3...

  • Publicación
    CCD BVR photometry of the open cluster IC 1311

    Six CCD frames for two fields in the area of the rich, presumably old, and unstudied open cluster IC 1311 have been obtained in the BVR bands. The photometric...

  • Publicación
    CCD photometry of resolved dwarf irregular galaxies. II - DDO 187. III - GR 8

    CCD photometry of resolved dwarf irregular galaxies was obtained with the 4-m Cerro Tololo Interamerican Observatory telescope in February 1985. BV data from 77...

  • Publicación
    Chemical abundances and masses of the haloes around the planetary nebulae NGC 6543 and NGC 6826

    Spatial resolved low resolution spectroscopy of the haloes around the planetary nebulae NGC 6543 and NGC 6826 were conducted. The results imply that the...

  • Publicación
    Constraints to the mass loss rate of globular cluster red giants

    The expected mass loss rates from horizontal branch (HB) and red giant branch models are investigated. The expected dependence of those rates on luminosity...

  • Publicación
    Empirical colour-metallicity relations for Population II giant stars

    The published J, H, and K band photometry of Frogel et al. (1983) for a sample of over 350 red giants in 33 galactic globular clusters, which covers the...

  • Noticia
    Estructuras espirales en estrellas viejas revelan la presencia de un compañero

    Al final de su vida, alrededor del 95% de las estrellas evolucionan a gigantes rojas que se desprenden de su masa a través de lo que se conoce como un viento...