Cross Catalogue Matching with Virtual Observatory and Parameterization of Stars

Abstract

Virtual Observatory facilities allow users to make a fast and correct cross-matching of objects from various surveys. They yield multi-color photometry data (color indices) on registered objects and make it possible to determine stellar parameters. A method of catalogue cross-matching, as well as its application to various areas in the sky and preliminary results of stellar parameterization, are discussed in the paper. We also make a critical analysis of modern stellar spectral atlases.

Verification of Photometric Parallaxes with Gaia DR2 Data

“…In Malkov et al [28] (hereinafter-Paper18) objects in four selected areas in the sky were cross-matched (see details of the procedure in [29][30][31]) with 2MASS (Two Micron All-Sky Survey) [32], SDSS (Sloan Digital Sky Survey) [19], GALEX (Galaxy Evolution Explorer) [20], and UKIDSS (UKIRT Infrared Deep Sky Survey) [33] surveys, and multi-wavelength photometric data were used to determine the parameters of stars. The galactic coordinates of the areas are (334, +61.9), (257, +48.7), (301, +62.1), and (129, −58.1).…”

Verification of photometric parallaxes with Gaia DR2 data

“…In Malkov et al [3] (hereinafter -M18) objects in four selected areas in the sky were cross-matched (see details of the procedure in [4], [5], [6]) in 2MASS [7], SDSS [8], GALEX [9], and UKIDSS [10] surveys, and combined photometric data were used to determine the parameters of stars. For 251 objects MK spectral types SpT, distances d and interstellar extinction values A V were estimated, minimizing the functional…”

Stellar and interstellar parameters from large photometric surveys

“…In particular, for each area and each pair we estimated the matching radius. As a result, we drew in a number 0.1-degree radius areas samples of point-like objects counterparts from the DENIS, 2MASS, SDSS, GALEX, and UKIDSS surveys, and performed a cross-identification within these surveys Karpov et al (2012), Malkov et al (2012). We have compiled the corresponding subcatalogues in the VOTable format.…”