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| Author(s): |
Thaina Aragao Sabino
Total Authors: 1
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| Document type: | Master's Dissertation |
| Press: | São Paulo. |
| Institution: | Universidade de São Paulo (USP). Instituto Astronômico e Geofísico (IAG/SBD) |
| Defense date: | 2022-10-14 |
| Examining board members: |
Jane Cristina Gregorio Hetem;
Roberto Dell'Aglio Dias da Costa;
Felipe Donizeti Teston Navarete;
Rodrigo Georgetti Vieira
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| Advisor: | Jane Cristina Gregorio Hetem |
| Abstract | |
Young stellar clusters are associated to star forming regions and play an important role in the chemical enrichment of the Galaxy. They are fundamental keys to understand the formation and evolution of the structures at galactic scales. Nonetheless, the process related to the clusters formation and the conditions of the medium in which they develop are still open questions to be solved. Aiming to contribute to the current scenario, this project is dedicated to perform a detailed study of the gas conditions around the young stellar clusters NGC 3572 and NGC 3590 and the stellar feedback effects based on SOAR/SAMI imaging observations in 4 bands with additional photometric data from 2MASS and WISE catalogs. We identified 37 and 42 members and, 32 and 34 candidates in NGC 3590 and NGC 3572, respectively. The chosen criteria to evaluate the membership are related to proper motion values: (6.12, 1.05) ± 0.11 mas/yr in NGC 3590, and (6.25, 2.04) ± 0.15 mas/yr in NGC 3572. The PARSEC isochrones show that NGC 3572 is a much younger object than NGC 3590, being only 3Myr old while NGC 3590 is 25 Myr old. The parallax distribution of the members indicates that the clusters are approximately located at same distance approximately. We estimate 0.39 ± 0.02 mas to NGC 3590 and 0.4 ± 0.06 mas to NGC 3572. In NGC 3572 we highlight the presence of a photoevaporating globule, the medium around the massive stars and a small cloud in the northwest. The section on the globules region reveals a radial gradient in emission, supporting the hypothesis described by Smith et al. (2003) in which the structure may be ionized from the outside in. (AU) | |
| FAPESP's process: | 19/25062-5 - Searching for peculiar features in the gas around young stellar clusters |
| Grantee: | Thaina Aragao Sabino |
| Support Opportunities: | Scholarships in Brazil - Master |