0566747 - FZÚ 2023 RIV US eng J - Journal Article
Závada, Petr - Píška, Karel
Catalog of wide binary, trinary and quaternary candidates from the Gaia data release 2 (Region |b| > 25°).
Astronomical Journal. Roč. 163, č. 1 (2022), č. článku 33. ISSN 0004-6256. E-ISSN 1538-3881
R&D Projects: GA MŠMT(CZ) LTT17018
Institutional support: RVO:68378271
Keywords : Gaia-ESA * 2D patterns * galactic latitude
OECD category: Particles and field physics
Impact factor: 5.3, year: 2022 ; AIS: 2.018, rok: 2022
Method of publishing: Open access
DOI: https://doi.org/10.3847/1538-3881/ac34f9

The occurrence of multiple stars, dominantly binaries, is studied using the Gaia-ESA DR2 catalog. We apply the optimized statistical method that we previously developed for the analysis of 2D patterns. The field of stars is divided into a mosaic of small pieces that represent a statistical set for analysis. Specifically, data input is represented by a grid of circles (events) with radius 0.°02 covering the sky in the field of galactic latitude ∣b∣ > 25°. The criteria for selecting candidates for multiple stars are based on two parameters: angular separation and collinearity of proper motion. Radial separation, due to limited accuracy, is used only as a weaker supplementary constraint. Due attention is paid to the accurate calculation of the background, which is a necessary input for evaluating the quality of the candidates.
Permanent Link: https://hdl.handle.net/11104/0338037