Abstract
Accurate interferometric kinematic data suggest the interpretation of the brightest regions of NGC 6164-5 as a two-branched helical structure related to HD 148937 and having a systemic radial velocity nearly coincident with that of the tenuous surrounding medium; the gas in the helix could be the result of non-equatorial ejections from the central star. Morphologic, spectroscopic, and kinematic data would also indicate that the distance of 1.4 kpc proposed by Westerlund (1960) is substantially correct.
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Carranza, G.J., Agüero, E.L. The kinematics of NGC 6164-5. Astrophys Space Sci 123, 59–65 (1986). https://doi.org/10.1007/BF00649124
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DOI: https://doi.org/10.1007/BF00649124