Astrofísicas: Galaxias espirales

  • Charla
    Bar characterization from S4G imaging: Gaining insight into the secular evolution of disc galaxies
    The ΛCDM model predicts that galaxies originate in dark matter haloes, undergoing in their early age a process of continuous merges with other galaxies that...
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    Bulge morphology of non-interacting starburst galaxies.
    The authors show, in NGC 4736, that the bulge indicates strong and radially variable ellipticity, evidence of star formation, and outflow, while the bulge of...
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    CCD photometry of Seyfert galaxies
    Morphology and elliptically averaged luminosity profiles have been derived from CCD surface photometry of thirteen Seyfert galaxies. Apparent V and I magnitudes...
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    CO Excitation, Molecular Gas Density, and Interstellar Radiation Field in Local and High-redshift Galaxies
    We study the carbon monoxide (CO) excitation, mean molecular gas density, and interstellar radiation field (ISRF) intensity in a comprehensive sample of 76...
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    Coherent star formation in spiral galaxies.
    A sample of spiral galaxies is examined, applying moments analysis to their broad-band azimuthal profiles, in order to search for evidence of coherent large...
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    Colors and color gradients in bulges of galaxies
    We have obtained surface photometry in U, B, R, and I for a complete optically selected sample of 45 early-type spiral galaxies, to investigate the colors and...
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    Corrugations in the discs of spiral galaxies - NGC 4244 and 5023
    The morphological characteristics of corrugations in the disk shapes of the edge-on galaxies NGC 4244 and 5023 are described to determine some of the properties...
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    Deep CCD photometry of spiral galaxies
    This study presents deep optical surface photometry in the R-band for the three spiral galaxies NGC 1003, NGC 5533, and NGC 6674. The luminosity profiles...
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    Density bounding of giant HII regions and the ionization of the diffuse interstellar medium
    Three different types of evidence are presented in favour of the hypothesis that the HII regions in disk galaxies with H-alpha luminosities greater than a...