Banca de QUALIFICAÇÃO: JÚLIO CÉSAR COSTA SANTOS

Uma banca de QUALIFICAÇÃO de MESTRADO foi cadastrada pelo programa.
STUDENT : JÚLIO CÉSAR COSTA SANTOS
DATE: 26/01/2024
TIME: 10:00
LOCAL: Sala Virtual (meet.google.com/erm-mfgi-oxt)
TITLE:

Photometric analysis of subgiant stars in binary systems

KEY WORDS:

Binary Stars, Photometry, Subgiant Stars.

PAGES: 50
BIG AREA: Ciências Exatas e da Terra
AREA: Astronomia
SUMMARY:

In this work, we analyzed photometrically  a sample of binary subgiant stars observed by the GAIA and Kepler satellites. The Kepler mission, was launched in 2009 by NASA, and remained active until 2018; the mission observed more than 100,000 stars, we crossmatched  the observational data between Kepler and Gaia,  astrometry  mission  launched by European Space Agency (ESA). Gaia aimed to compile a 3D catalog with 100 million stars with greater precision in position, distances, movements and changes in brightness. Initially, a we used a catalog with 1,274,059 Gaia. Subgiant stars have been present in catalogs for more than a century, but around 1935 they began to be defined and added to stellar classifications. Spectroscopic data were used to separate subgiant stars from revised Kepler mission data. To have better precision in the results to be found, previous analyzes of the literature were used to identify binary systems. In this way, we constructed a sample by 124 binary and subgiant stars. To analyze the physical properties of these stars, we looked at the light curves obtained by the Kepler satellite in line with spectroscopic data.

COMMITTEE MEMBERS:
Presidente - 4857669 - JEFFERSON SOARES DA COSTA
Interno - 2757086 - JOILSON BATISTA DE ALMEIDA REGO
Externo à Instituição - THARCISYO SA E SOUSA DUARTE