There are cosmology and galaxy physics and stellar physics work groups at Tartu Observatory. The contacts of the researchers can be found here.
Cosmology and galaxy physics
A particularly exciting period has arrived for studying the overall properties of the Universe. A wide range of ground and space experiments are gathering an unprecedented amount of high-quality data, which allow us to tackle some of the most interesting and fundamental physical problems: the nature of dark energy and dark matter, the properties of the early Universe and structure formation from the scale of galaxies to the scale of the largest known matter configurations, galaxy superclusters and filaments.
Galaxies are the largest single objects in the Universe. Within them, some of the most important processes take place: the circulation of the cosmic material from gas to stars and back, resulting in the enrichment of matter with various chemical elements. In our galaxy physics team we study the structure and composition of both local and distant galaxies. We also consider the influence of neighbouring galaxies and the general distribution of the surrounding matter on the evolution of galaxies.
Stars are the main building blocks of the visible universe. They act as
thermonuclear reactors, synthesizing all the chemical elements heavier than
hydrogen and helium. Stellar physicists at Tartu Observatory are studying
single and binary stars, both theoretically and observationally. The main
research areas are as follows: variability and evolution of massive stars; shells, discs and other outflows from stars; symbiotic and related binary stars; preparations to the analysis of the Gaia data; computations of stellar model atmospheres and synthetic spectra; relativistic physics in the sources of gamma-ray-bursts; statistical analysis of astronomical time series.