Astrofísicas: Galaxias

  • Publicación
    Polarization properties of changing-look active galactic nuclei: NGC 1365 and NGC 2992
    Changing-look active galactic nuclei (CLAGNs) represent a rare class of AGNs that undergo transitions from type 1 (characterized by the presence of broad...
  • Publicación
    Polarized Mid-infrared Synchrotron Emission in the Core of Cygnus A
    We present high-angular (~0.''4) resolution mid-infrared (MIR) polarimetric observations in the 8.7 μm and 11.6 μm filters of Cygnus A using CanariCam on the 10...
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    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...
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    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...
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    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...