Astrofísicas: Galaxias

  • Publicación
    Atlas of H alpha Emission of a Sample of Nearby Hickson Compact Groups of Galaxies
    H alpha and adjacent continuum images are presented for a sample of nearby groups of galaxies extracted from the Atlas of Compact Groups of Galaxies. Also, more...
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    Atomic hydrogen in the spiral galaxy NGC 3631
    New high-resolution, high-sensitivity Westerbork Synthesis Radio Telescope Hi synthesis observations of the spiral galaxy NGC 3631 are presented. In the total...
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    Automatic Unsupervised Classification of All Sloan Digital Sky Survey Data Release 7 Galaxy Spectra
    Using the k-means cluster analysis algorithm, we carry out an unsupervised classification of all galaxy spectra in the seventh and final Sloan Digital Sky...
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    Axisymmetrical gas inflow in the central region of NGC 7331
    New Integral Field Spectroscopy of the central region of NGC 7331 reveals strong Hα emission in the well-known CO and HI ring of NGC 7331. The [NII]/Hα ratio...
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    Azimuthal dependence of the density distribution in outer galactic discs accreting intergalactic flows
    Aims: The amplitude and scaleheight of the Galactic gas disc density are not axisymmetric against expectations in a self-gravity axisymmetric disc. However...
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    B-type supergiants in the Small Magellanic Cloud: rotational velocities and implications for evolutionary models
    High-resolution spectra for 24 SMC and Galactic B-type supergiants have been analysed to estimate the contributions of both macroturbulence and rotation to the...
  • Publicación
    B-type supergiants in the SMC: Chemical compositions and comparison of static and unified models
    High-resolution UCLES/AAT spectra are presented for nine B-type supergiants in the SMC, chosen on the basis that they may show varying amounts of nuclear...
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    B1359+154: A Six-Image Lens Produced by a z ~= 1 Compact Group of Galaxies
    Hubble Space Telescope (HST) V- and I-band observations show that the gravitational lens B1359+154 consists of six images of a single zs=3.235 radio source and...
  • Publicación
    Balmer lines emission region in NGC 3516: Kinematical and physical properties
    We have studied the Balmer line shapes of NGC 3516 in order to find the structure of central Emission Line Region (ELR) and the physical parameters of the...