Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...127..186c&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 127, no. 1, Oct. 1983, p. 186-194.
Astronomy and Astrophysics
Astrophysics
12
Astronomical Photometry, Binary Stars, Cepheid Variables, Light Curve, Radial Velocity, Stellar Motions, Data Simulation, Least Squares Method, Phase Shift, Signal Analysis
Scientific paper
A frequency reanalysis of Van Hoof's (1962) photometric observations and of Pagel's (1956) radial velocity observations of Beta Crucis is presented. It is found that the occurrence of strong one-day aliasing in the period analysis is related to the lengths of the observation nights. Numerical simulations show that short observation nights make all aliases as significant as the intrinsic period and that the shortest alias can be mistaken for the intrinsic period. Phase dispersion minialization analysis and least squares analysis of Van Hoof's photometric data lead to an intrinsic period of 0.1911846 + or - 0.0000005 days. In view of the inaccuracy of the period analysis and the large amount of noise present in all the data, the secondary period common to all observations, 0.359 days, may be related to an intrinsic frequency of the star, but it also may be a noise component.
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