Spectroscopic Observations of the Cluster-Type Variable VZ CANCRI.
Abstract
The radial velocities obtained from ninety-two spectrograms of VZ Cancri show variations with both periods (4ht7 and t7ht2 found by Fitch from light-observations. The phase shift of mid-rising light with the long-period variation is reflected by a similar phase shift in the radial velocities. Mid-decreasing velocity occurs at mid-rising light. Maximum velocity range occurs at the same phase of the long-period variation as does maximum light-range. The range of 39.6 km/sec in the mean velocity-curve is consistent with expectations from three other short-period variables. The spectrum is of luminosity class III and varies between A7-A9 at light-maxima and F1-F2 at light-minima.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- November 1955
- DOI:
- 10.1086/146099
- Bibcode:
- 1955ApJ...122..390A