RR LYRAE VARIABLE STARS: PULSATIONAL CONSTRAINTS RELEVANT TO THE OOSTERHOFF CONTROVERSY
Astrophysics
2009-10-28 v1
Abstract
A solution to the old Oosterhoff controversy is proposed on the basis of a new theoretical pulsational scenario concerning RR Lyrae cluster variables (Bono and coworkers). We show that the observed constancy of the lowest pulsation period in both Oosterhoff type I (OoI) and Oosterhoff type II (OoII) prototypes (M3, M15) can be easily reproduced only by assuming the canonical evolutionary horizontal-branch luminosity levels of these Galactic globular clusters and therefore by rejecting the Sandage period shift effect (SPSE).
Cite
@article{arxiv.astro-ph/9506001,
title = {RR LYRAE VARIABLE STARS: PULSATIONAL CONSTRAINTS RELEVANT TO THE OOSTERHOFF CONTROVERSY},
author = {G. Bono and F. Caputo and V. Castellani and M. Marconi},
journal= {arXiv preprint arXiv:astro-ph/9506001},
year = {2009}
}
Comments
postscript file of 7 pages and 2 figures; one non postcript figure is available upon request; for any problem please write to [email protected]