Open Clusters in the Milky Way

21 Março 2023, 09:00 • André Maria da Silva Dias Moitinho de Almeida

- How open clusters (OCs) provided the first proof of the existence of an interstellar medium

- OC catalogues

- Characterisation of the OC sample

- OC view of Galactic structure

- OC view of Galactic dynamics

- OC view of Galactic evolution

- The Gaia space mission

Additional reading:

- Moitinho, A., 2010, “Observational properties of the open cluster system of the Milky Way and what they tell us about our Galaxy”. Proc IAU S266, 106-116. doi:10.1017/S1743921309990949

- Cantat-Gaudin, T., et. al, 2020, “Painting a portrait of the Galactic disc with its stellar clusters”. A&A, 640, A1. doi:10.1051/0004-6361/202038192

- Cantat-Gaudin, T., 2022, “Milky Way Star Clusters and Gaia: A Review of the Ongoing Revolution”. Universe, 8, 111. doi:10.3390/universe8020111

Analysing resolved stellar populations using Gaia data and theoretical models (III)

14 Março 2023, 11:00 • André Maria da Silva Dias Moitinho de Almeida

# Clusters parameter determination by eye

- Overlaying isochrone lines and cluster point clouds on photometric diagrams

- Trial and error fitting of distance, reddening and age on photometric diagrams

Star Clusters as Simple Stellar Populations (II)

14 Março 2023, 09:00 • André Maria da Silva Dias Moitinho de Almeida

- Globular clusters: Not so simple stellar populations; their spatial and metallicity distribution, HRD and multiple populations

- Embedded clusters and the pre-main sequence phase

Analysing resolved stellar populations using Gaia data and theoretical models (II)

7 Março 2023, 11:00 • André Maria da Silva Dias Moitinho de Almeida

Jupyter-notebook exercise

# Reading the data tables in python

- simple basic approach (requires deleting and editing lines by hand)

- sophisticated approaches (fully automatic reading)

# First look plots 

- Isochrones: selecting ages; plotting

- cluster members

- Fine tunning plots

Star Clusters as Simple Stellar Populations (I)

7 Março 2023, 09:00 • André Maria da Silva Dias Moitinho de Almeida

- Types of clusters: embedded, open, globular

- Some characteristics: numbers of stars, sizes, ages, metallicity

- HR diagrams of clusters

- Context in the Milky Way and in other galaxies

Additional reading:

- Chap 9 - Salaris & Cassisi

- Chap 2, 4, 5.1 - Greggio & Renzini