Division seminars

Binary and multiple stellar systems from data analysis of the space observatory GAIA

Name: Binary and multiple stellar systems from data analysis of the space observatory GAIA
Start: 2023-11-30T14:00:00+01:00
End: 2023-11-30T15:00:00+01:00
Location: No location set

by Dr Petr Závada

Thursday 30 Nov 2023, 14:00 → 15:00 Europe/Prague

Description

Abstract:

The occurrence of multiple stars, dominantly binaries, is studied using the Gaia-ESA catalog. We apply the statistical method that we have developed for the analysis of 2D patterns. The criteria for selecting multiple-star candidates are based on two parameters: angular separation and collinearity of proper motion. Radial separation is only used as a weaker additional constraint due to its limited accuracy. Due attention is paid to the accurate calculation of the background, which is a necessary input for evaluating the quality of the candidates. Our selection algorithm generates the catalog of candidates: 900 842 binaries, 5282 trinaries, and 30 quaternaries.

The seminar will be held in the conference hall in the main building of the Institute of Physics, Na Slovance 2, Prague 8 on the ground floor.

Location: https://goo.gl/maps/wEf7PsiLimSXMZhE9

The seminar will be also available via ZOOM video conference system:

Meeting ID: 674 9629 6646
Passcode: 575511

or join meeting via direct ZOOM link