RR Lyrae stars in the outer region of the globular cluster M3: a shortage of long periods at r ~ 3.5 to 6 arcmin ?
arXiv:astro-ph/0404158 · doi:10.1051/0004-6361:20040137
Abstract
An analysis of the radial distribution of ab-type RR Lyrae star periods in the outer region of the globular cluster M3 at r >= 0.83 arcmin has been performed. That analysis points towards a real shortage of stars with long periods in the radial distance range 3.5 to 6 arcmin (or about 7 to 12 core radii). A brief discussion is presented. The origin of the phenomenon remains an open question.
3 pages, 2 figures, Accepted for publication in A&A