The course material for the HGSFP graduate days (October 2018). It consists of Gaia mission and data introduction and hands-on jupyter notebooks redoing parts of the scientific analysis of the following papers: Hyades, Stellar encounters, Geometric distances from parallaxes.
The notebooks are commented and there are coding tasks given (try to avoid looking at the solutions, which are usually given in the following field).
The complete data directory can be downloaded from here. The data can be obtained by running the Retrieval notebooks as well. These use ADQL queries on virtual observatory services.
- General introduction to Gaia mission and Gaia DR2
- Making a solar neighbourhood sample, cleaning it
- Fitting isochrones by eye to the Hyades
- Time series analysis from sparsely and unevenly sampled epoch data
- Variable stars
- Stellar encounter
- LMA vs Orbit integration
- Completeness
- Follow-up calculation
- Bayesian inference
- Distance estimation from parallaxes
- Forward model
- GDR2mock prior
- MCMC Sampling of the posterior
- Inferring stellar parameters for the stellar encounter sample
- grav. redshift correction / impact parameters
- Classifying variable stars
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