Does 28 Canis Majoris exhibit a double oscillation periodicity?

Details Does 28 Canis Majoris exhibit a double oscillation periodicity? Does 28 Canis Majoris exhibit a double oscillation periodicity?

Jun 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990a%26a...232..411c&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 232, no. 2, June 1990, p. 411-419. Research supported by SERC.

Astronomy and Astrophysics

Astrophysics

8

B Stars, Stellar Oscillations, Brightness Distribution, Polarization (Waves), Radial Velocity, Stellar Atmospheres, Stellar Spectrophotometry

Scientific paper

Polarimetric and H-beta photometric observations of 28 CMa, obtained with the 0.75-m telescope at SAAO in April/May 1983 and with the 1.0-m telescope at Roque de los Muchachos Observatory in January 1985, are reported and analyzed. The data are combined with previous radial-velocity measurements and the photometry of Balona et al. (1987) and presented in a series of radial-velocity curves. It is found that 28 CMa is probably an oblique rotator, with stellar inclination i = 52 + or - 26 deg and the variable polarigenic source near the pole. A period of 2.7335 d is shown to fit the combined data better than the 1.36673-d period proposed by Baade (1982) on the basis of spectrometry.

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