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  • 1
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    A study of HII regions in spiral galaxies using multiobject spectroscopy (1990)
    In:  CASI
    Details
    Publication Date: 2013-08-31
    Description: Multiobject spectroscopy results of HII regions in nearby late-type spiral galaxies are given. Results include excitation measurements, log ((O III)/H beta), for 81 regions in M 101, 30 regions in NGC 2403, and 13 regions in M 51. Researchers conclude that late-type spirals can be classified into two distinct populations, examine possible causes of this division, and derive metallicity gradients for these galaxies. M 51 appears to have an anomalously shallow abundance gradient.
    Keywords: ASTROPHYSICS
    Type: NASA, Ames Research Center, The Interstellar Medium in External Galaxies: Summaries of Contributed Papers; p 169-171
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 2
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    The dynamics of Abell 2634 (1993)
    In:  CASI
    Details
    Publication Date: 2019-06-28
    Description: We have amassed a large sample of velocity data for the cluster of galaxies Abell 2634 which contains the wide-angle tail (WAT) radio source 3C 465. Robust indicators of location and scale and their confidence intervals are used to determine if the cD galaxy, containing the WAT, has a significant peculiar motion. We find a cD peculiar radial velocity of 219 plus or minus 98 km s(exp -1). Further dynamical analyses, including substructure and normality tests, suggest that A 2634 is an unrelaxed cluster whose radio source structure may be bent by the turbulent gas of a recent cluster-subcluster merger.
    Keywords: ASTROPHYSICS
    Type: NASA. Ames Research Center, The Evolution of Galaxies and Their Environment; p 269-270
    Format: application/pdf
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    NASA TECHNICAL REPORTS
  • 3
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    Experimental investigation of a 4 1/2-stage turbine with very high stage loading factor. 1: Turbine design (1973)
    In:  CASI
    Details
    Publication Date: 2019-06-27
    Description: The results of the Task 1 and 2 turbine design work are reported. Preliminary design is discussed. Blading detailed design data are summarized. Predicted performance maps are presented. Steady-state stresses and vibratory behavior are discussed, and the results of the mechanical design analysis are presented.
    Keywords: PROPULSION SYSTEMS
    Type: NASA-CR-2140
    Format: application/pdf
    Location Call Number Expected Availability
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    NASA TECHNICAL REPORTS
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