Period of 160 minutes of RR Lyr variables in globular clusters and highly evolved close binary systems.
Abstract
A statistical analysis based on computation of socalled "commensurability spectra" is applied to periods of 1211 RR Lyr variables in globular clusters and to a sample of highly evolved close binaries with orbital periods less than 4 days. It is shown that for the frequency range studied (from about 35 to 150 μHz) the period of 160 min appears to be the most characteristic one, with respect to commensurability, for both period distributions. The effect is found to be significant at about 3.8 and 3.2σ levels of confidence for RR Lyr variables and close binary systems correspondingly. It is suggested that this particular status of the 160min period, at first discovered in the solar oscillations, then in galactic binary stars, and which seems to be of "universal" character, might reflect some unknown property of gravitational interaction.
 Publication:

Izvestiya Ordena Trudovogo Krasnogo Znameni Krymskoj Astrofizicheskoj Observatorii
 Pub Date:
 1986
 Bibcode:
 1986IzKry..75..113K
 Keywords:

 Binary Stars;
 Cepheid Variables;
 Globular Clusters;
 Solar Oscillations;
 Stellar Orbits;
 Gravitation Theory;
 Lyra Constellation;
 Statistical Analysis;
 Astrophysics;
 Close Binaries:Periods;
 Periods:Close Binaries;
 Periods:RR Lyrae Stars;
 RR Lyrae Stars:Periods