The radial velocities of γ1 Vel suggest that we are dealing with a spectroscopic binary of a period of 1d.482575 The scatter of the velocities is large and there seem to be variations in the velocity distribution at different cycles particularly at the quadrature of maximum positive velocity. A new spectrographic investigation with a very good coverage of a number of different cycles is desirable.
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Hernández et al. (1980) studied this question.