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  • Other Sources  (2)
  • ASTROPHYSICS  (2)
  • 2015-2019
  • 1985-1989  (2)
  • 1945-1949
  • 1986  (2)
  • 1948
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  • Other Sources  (2)
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  • 2015-2019
  • 1985-1989  (2)
  • 1945-1949
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  • 1
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    Unknown
    The radio source in the very luminous gamma-ray Seyfert galaxy MCG 8-11-11 (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: VLA high resolution observations of the Seyfert 1.5 galaxy MCG 8-11-11 at 2 and 6 cm show the center of the galaxy to contain a triple radio source of 400 pc, with a less than 30-pc diameter central component that may be identified as the center of the galaxy. The triple source is in turn embedded in more diffuse emission which has a major axis position angle similar to that in the optical galaxy, but differing from the position angle of the triple source by 50 deg. While the overall morphology of the source is S-shaped, the curvature of the triple source at the ends is abrupt rather than continuous and gradual. It appears that the core radio emission in Seyfert 1 and 1.5 galaxies may be weakly correlated with their X-ray emission.
    Keywords: ASTROPHYSICS
    Type: Royal Astronomical Society, Monthly Notices (ISSN 0035-8711); 218; 711-719
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Unknown
    X-ray observations of supernova remnants resembling the Crab Nebula (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Out of the three SNRs G291.0 - 0.1, G308.7 + 0.0, and G328.4 + 0.2, which resemble the Crab Nebula in many of their radio properties, the present Einstein Observatory search was able to detect only the first, which is noted to have very extended X-ray emission with strong central brightening. Given the large distances and hydrogen column densities of the other two SNRs, their X-ray limits are consistent with membership in the Crab Nebula-like group. The evolutions of radio luminosity, X-ray luminosity, and the ratio of the two luminosities with remnant diameter are reassessed for this SNR class. No evidence is found for a radio luminosity decrease with diameter (age).
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 1 (ISSN 0004-637X); 302; 718-726
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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