STELLAR POPULATIONS

Second cycle degree in ASTRONOMY

Campus: PADOVA

Language: English

Teaching period: Second Semester

Lecturer: GIOVANNI CARRARO

Number of ECTS credits allocated: 6


Syllabus
Prerequisites: Basic knowledge of stellar astrophysics: Stellar evolution, c-m diagrams, stellar photometry and spectroscopy, astrometry.
Examination methods: Oral
Course unit contents: Color magnitude diagrams.
Luminosity-magnitude and temperature-color transformation. Effects of the interstellar reddening on the color-magnitude diagrams.

The concept of stellar populations: Historical background.

Stellar populations: Modern view.

The Galactic model by Eggen, Lynden-Bell and Sandage.

The galactic halo model from Searle and Zinn.

Stellar populations in the solar neighbor

The interstellar medium near to the Sun and the local bubble.

Population II.
Measurement of population II main parameters: reddening,
distance, age, chemical content
Globular Clusters stellar populations
The concept of multiple stellar populations
The helium content of the population II stars.
The horizontal branch and the second parameter problem

The population I and the galactic disk. Open clusters and field population.

Stellar populations in dwarf Galaxies of the Local Group

The initial mass function.

Observational parameters of unresolved stellar population and their interpretation

Star formation History in galaxies

Basic principles of the chemical evolution of the stellar populations.