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  • 1
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    An edge-on galaxy model for Q 0957 + 561 (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: An edge-on disk galaxy would act as a lens to produce two images which are aligned. Such a model would explain the observed features of Q0957 + 561A, and B. The third image is expected to be very faint and so neat to center of the lensing galaxy as to be unobservable.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Letters (ISSN 0004-6388); 25; 2 19
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
  • 2
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    Variation in hydrogen emission lines of the QSO PKS 0736 + 017 (1986)
    In:  Other Sources
    Details
    Publication Date: 2019-07-12
    Description: Significant variations of the broad hydrogen emission lines in the QSO 0736 + 017 have been found. Between 1978 and 1980 the H-beta line intensity dropped by 40-percent, and between 1985 and 1986 it increased by more than 50 percent. The H-gamma line intensity underwent a larger fractional change. Line variations occurred in less than 1 yr after variations of the underlying continuum, indicating that a major part of the broad line emission originates in a region of 1 lt-yr or smaller if it is spherical.
    Keywords: ASTROPHYSICS
    Type: Astrophysical Journal, Part 2 - Letters to the Editor (ISSN 0004-637X); 306; L67-L69
    Format: text
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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