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  • ASTRONOMY  (3)
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  • 1
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    Revised sizes and positions for the Mailyan dwarf galaxy catalog (1994)
    In:  Other Sources
    Details
    Publication Date: 2011-08-24
    Description: New positions (good to +/- 15 arcsec), revised sizes, and sample cross-identifications are presented for dwarf galaxies discovered and published by Mailyan (1973, Astrofizika, 9, 33). Of the 104 originally cataloged galaxies we were able to recover only 100, despite an extensive search of the red and blue Palomar Observatory Sky Survey (POSS) prints. Over half of the recovered objects were found to correspond to previously cataloged galaxies; few if any of these are dwarf spheriodal galaxies, but rather mostly dwarf irregulars of low surface brightness.
    Keywords: ASTRONOMY
    Type: Publications of the Astronomical Society of the Pacific (ISSN 0004-6280); 106; 695; p. 63-66
    Format: text
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    NASA TECHNICAL REPORTS
  • 2
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    Ultraluminous infrared galaxies (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: The IRAS survey of the local universe has revealed the existence of a class of ultraluminous infrared galaxies with L(8 to 1000 micrometer) greater than 10 to the 12th L sub 0 that are slightly more numerous, and as luminous as optically selected quasars at similar redshift. Optical CCD images of these infrared galaxies show that nearly all are advanced mergers. Millimeter wave CO observations indicate that these interacting systems are extremely rich in molecular gas with total H2 masses 1 to 3 x 10 to the 10th power M sub 0. Nearly all of the ultraluminous infrared galaxies show some evidence in their optical spectra for nonthermal nuclear activity. It is proposed that their infrared luminosity is powered by an embedded active nucleus and a nuclear starburst both of which are fueled by the tremendous reservoir of molecular gas. Once these merger nuclei shed their obscuring dust, allowing the AGN to visually dominate the decaying starburst, they become the optically selected quasars.
    Keywords: ASTRONOMY
    Type: NASA, Washington Star Formation in Galaxies; p 411-420
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    The luminosity function of the brightest galaxies in the IRAS survey (1987)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Results from a study of the far infrared properties of the brightest galaxies in the IRAS survey are described. There is a correlation between the infrared luminosity and the infrared to optical luminosity ratio and between the infrared luminosity and the far infrared color temperature in these galaxies. The infrared bright galaxies represent a significant component of extragalactic objects in the local universe, being comparable in space density to the Seyferts, optically identified starburst galaxies, and more numerous than quasars at the same bolometric luminosity. The far infrared luminosity in the local universe is approximately 25% of the starlight output in the same volume.
    Keywords: ASTRONOMY
    Type: NASA, Washington Star Formation in Galaxies; p 523-530
    Format: application/pdf
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    NASA TECHNICAL REPORTS
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