2004/04/20 by A. Ruoppo, V. Ripepi, M. Marconi +1
Physics and Astronomy · #Adaptive optics and wavefront sensing #Apparent magnitude #Brightness #Calibration #Cepheid variable #Light curve #Photometry (optics) #Radial velocity #Solar and Space Plasma Dynamics #Stellar, planetary, and galactic studies #Surface brightness #astro-ph
paper · pdf · doi:10.1051/0004-6361:20035901
published as Astron.Astrophys. 422 (2004) 253-265 · 13 pages including 12 postscript figures and 3 jpeg figures; accepted for publication on A&A
arxiv created 2004/04/20 · openalex publication_date 2004/07/01 · arxiv updated 2009/12/01 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
In this paper we present a modified version of the CORS method based on a new calibration of the Surface Brightness function in the Strömgren photometric system. The method has been tested by means of synthetic light and radial velocity curves derived from nonlinear pulsation models. Detailed simulations have been performed to take into account the quality of real observed curves as well as possible shifts between photometric and radial velocity data. The method has been then applied to a sample of Galactic Cepheids with Strömgren photometry and radial velocity data to derive the radii and a new PR relation. As a result we find (rms = 0.07). The comparison between our result and previous estimates in the literature is satisfactory. Better results are expected from the adoption of improved model atmosphere grids.