README.md

The GALAH survey: unresolved triple Sun-like stars discovered by the Gaia mission

The paper was published at MNRAS.

Code used in the analysis of Solar twin stars multiplicity and production of the acompanying science paper that describes identification and characterization of triple system candidates.

Detection od Solar-twin candidates

Done in a seprate repository/science paper.

Creation of photometric one star model

Steps:

• Combine observations of multiple phomoteric surveys and Gaia astrometry - prepare_data.py
• Add reddeding and extinction information to the table - prepare_data_reddening.py
• Prepare photometric table with median photometric informations - prepare_photometry_reference_table.py

Creation of spectroscopic one star model

To train the spectroscopic Cannon model, sript Cannon_model_train.py was used.

Fit multiple one star models to the observation and determine systems configuration

The core of the analysis is made by function and procedures writen in multiples_analyze_functions.py. The proceured is run from multiples_analyze.py, where all relavant parameters for the fitting procedure are set and determined.

Orbital characterization and simulations

Monte Carlo analysis of orbital periods is presented in the script MC_orbital_periods.py.

Test and simulations

Multiple test ans imulations were run to ensure the quality of the results:

• Observational offsets using Galaxia galactic model - galaxia_determine_observationa_offsets.py
• Analysis of synthetic multiple systems - multiples_analyze_binarysystem_simulation.py