Verification of Photometric Parallaxes with Gaia DR2 Data
Zhao, Gang; Karpov, Sergey; Sytov, Alexey; Malkov, Oleg; Kovaleva, Dana; Zhukov, Aleksandr; Dluzhnevskaya, Olga; Chulkov, Dmitry; Kniazev, Alexey; Murthy, Jayant; Sichevsky, Sergey; Mickaelian, Areg; Mironov, Alexey
Russia, Czech Republic, South Africa, Armenia, India, China
Abstract
Results of comparison of Gaia DR2 parallaxes with data derived from a combined analysis of 2MASS (Two Micron All-Sky Survey), SDSS (Sloan Digital Sky Survey), GALEX (Galaxy Evolution Explorer), and UKIDSS (UKIRT Infrared Deep Sky Survey) surveys in four selected high-latitude |b|> 48° sky areas are presented. It is shown that multicolor photometric data from large modern surveys can be used for parameterization of stars closer than 4400 pc and brighter than gSDSS=19.m6, including estimation of parallax and interstellar extinction value. However, the stellar luminosity class should be properly determined.