The absolute magnitudes of RR Lyrae stars - II. DX Delphini.
Jameson, R. F.; Fernley, J. A.; Lynas-Gray, A. E.; Skillen, I.; Longmore, A. J.
United Kingdom
Abstract
UV, IR and visual photometry of the short-period RR Lyrae star DX Del is presented and treated by means of the Blackwell and Shallis (1977) IR Flux Method-based formulation of the Baade-Wesselink method. Upon correcting to common reddening, extinction, and radial-velocity conversion factors, as well as applying the Baade-Wesselink analysis of Burki and Meylan (1986), it proved impossible to reproduce their results. It is suggested that the present methods are inherently more stable than those of Burki and Meylan, given their reliance on optical colors and magnitudes to derive effective temperatures and radii.