Astrofísicas: Galaxias

  • Publicación
    Populations of High-Luminosity Density-bounded H II Regions in Spiral Galaxies: Evidence and Implications
    We present evidence that the H II regions of high luminosity in disk galaxies may be density bounded, so that a significant fraction of the ionizing photons...
  • Publicación
    Position-velocity diagrams of ionized gas in the inner regions of disk galaxies
    We use long-slit spectroscopy along the major axis of a sample of 23 nearby disk galaxies to study the kinematic properties of the ionized-gas component in...
  • Publicación
    Post first dredge-up [C/N] ratio as age indicator. Theoretical calibration
    We performed a detailed analysis of the use of [C/N] measured in red giant branch stars between the completion of the first dredge up and the red giant branch...
  • Publicación
    Power spectrum of the CODEX clusters
    Aims. We analyze the clustering of galaxy clusters in a large contiguous sample, the Constrain Dark Energy with X-ray (CODEX) sample. We construct a likelihood...
  • Publicación
    Powerful mechanical-driven outflows in the central parsecs of the low-luminosity active galactic nucleus ESO 428-G14
    Low-luminosity Active Galactic Nuclei (LLAGNs) are characterized for low-radiative efficiency, much less than one percent of their Eddington limit. Nevertheless...
  • Publicación
    Powerful outflows in the central parsecs of the low-luminosity active galactic nucleus NGC 1386
    Low-luminosity active galactic nuclei, i.e. L_{bol}/Ledd ∼ 10-6-10-3, constitute the bulk population of active galactic nuclei (AGNs). Powerful jets, common in...
  • Publicación
    POX 4 and Tol 35: Two Peculiar Wolf-Rayet Dwarf Galaxies
    We present results of narrowband (Hα and adjacent continuum) and broadband (U, B, and V) optical CCD imaging together with high-resolution Hα spectroscopy of...
  • Publicación
    Precision Determination of Corotation Radii in Galaxy Disks: Tremaine–Weinberg versus Font–Beckman for NGC 3433
    Density waves in galaxy disks have been proposed over the years, in a variety of specific models, to explain spiral arm structure and its relation to the mass...
  • Publicación
    Preparing for low surface brightness science with the Vera C. Rubin Observatory: a comparison of observable and simulated intracluster light fractions
    Intracluster light (ICL) provides an important record of the interactions galaxy clusters have undergone. However, we are limited in our understanding by our...