Astrofísicas: Cúmulos globulares de estrellas

  • Noticia
    Descubren una galaxia intacta desde el comienzo del Universo

    Investigadores del Instituto de Astrofísica de Canarias (IAC) confirman la primera detección de una galaxia reliquia con el Telescopio Espacial Hubble. Los...

  • Publicación
    Eclipsing binaries in the galactic globular cluster Omega Centauri

    We present a photometric survey aimed at the identification of variable stars in the galactic globular cluster ω Cen. Our photometric catalogue is based on ~...

  • Publicación
    Metallicity of Galactic RR Lyrae from Optical and Infrared Light Curves. I. Period-Fourier-Metallicity Relations for Fundamental-mode RR Lyrae

    We present newly calibrated period-φ 31-[Fe/H] relations for fundamental-mode RR Lyrae stars in the optical and, for the first time, mid-infrared. This work's...

  • Publicación
    Metallicity of Galactic RR Lyrae from Optical and Infrared Light Curves. II. Period-Fourier-Metallicity Relations for First Overtone RR Lyrae

    We present new period-ϕ 31-[Fe/H] relations for first-overtone RRL stars (RRc), calibrated over a broad range of metallicities (-2.5 ≲ [Fe/H] ≲ 0.0) using the...

  • Publicación
    Multiple Populations in Low-mass Globular Clusters: Palomar 13

    Since the discovery of chemically peculiar stars in globular clusters in the last century, the study of multiple populations has become increasingly important...

  • Publicación
    On the Use of Field RR Lyrae as Galactic Probes. V. Optical and Radial Velocity Curve Templates

    We collected the largest spectroscopic catalog of RR Lyrae (RRLs) including ≍20,000 high-, medium-, and low-resolution spectra for ≍10,000 RRLs. We provide the...

  • Publicación
    Searching for Tidal Remnants in the Milky Way: Photometric Survey of Globular Clusters

    The picture of building the Milky Way halo from the merger of protogalactic fragments is considered the local manifestation of the hierarchical galaxy formation...

  • Publicación
    The Fast X-Ray Transient XRT 210423 and Its Host Galaxy

    Fast X-ray Transients (FXTs) are X-ray flares with durations ranging from a few hundred seconds to a few hours. Possible origins include the tidal disruption of...

  • Publicación
    The Hubble Space Telescope UV Legacy Survey of Galactic Globular Clusters. XXIII. Proper-motion Catalogs and Internal Kinematics

    A number of studies based on the data collected by the Hubble Space Telescope (HST) GO-13297 program "HST Legacy Survey of Galactic Globular Clusters: Shedding...