VizieR Online Data Catalog: Applying Chronostar to β Pictoris group (Crundall+, 2019)
Abstract
In this paper we present the methodology for Chronostar, a new kinematic analysis tool to identify and age unbound stars that share a common origin. The tool requires no manual calibration or pre-selection, and simultaneously and self-consistently solves the problems of assigning stars to associations and determining the properties of those associations. We test Chronostar extensively on synthetic data sets, including ones containing multiple, overlapping components and ones where the initial positions and velocities are stars are drawn directly from a hydrodynamic simulation of star formation, and show that it returns very accurate membership assignments and kinematic ages. In tests on real data, we show that Chronostar is capable of blindly recovering the β Pictoris and Tucana-Horologium moving groups, with the kinematic data used to find the latter originating solely from Gaia DR2 (Gaia Collaboration, 2018, Cat. I/345).
(1 data file).- Publication:
-
VizieR Online Data Catalog
- Pub Date:
- January 2023
- Bibcode:
- 2023yCat..74893625C
- Keywords:
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- Positional data;
- Proper motions;
- Spectral types;
- Radial velocities;
- Associations: stellar;
- Optical;
- Models