| Title |
Žvaigždžių populiacijos mažos masės sistemose / |
| Translation of Title |
Stellar populations in low mass systems. |
| Authors |
Čeponis, Marius |
| DOI |
10.15388/vu.thesis.664 |
| Full Text |
|
| Pages |
192 |
| Keywords [eng] |
stars ; star formation ; star clusters |
| Abstract [eng] |
The dissertation examines the influence of the environment on the stellar populations in low-mass systems. The irregular dwarf galaxy Leo A and the star clusters in the Andromeda galaxy were studied. The observations of the Hubble Space Telescope and the ground-based Subaru Telescope were used for the research. Two new photometric methods have been developed for the study of stellar populations: an algorithm for reproducing the star formation history of dwarf galaxies and a procedure for determining the parameters of star clusters. The star formation history of the dwarf galaxy Leo A has been determined – most of the stars formed during the last 6 billion years in star formation bursts. It was shown that the star-forming region during the last ∼300 million years gradually receded. Also, ages, masses, and interstellar extinctions were determined for 854 star clusters in the Andromeda galaxy. These results suggest a burst of star formation activity ∼220 million years ago. |
| Dissertation Institution |
Valstybinis mokslinių tyrimų institutas Fizinių ir technologijos mokslų centras. |
| Type |
Doctoral thesis |
| Language |
Lithuanian |
| Publication date |
2024 |
