Banca de DEFESA: RAFAEL RAMON FERREIRA

Uma banca de DEFESA de MESTRADO foi cadastrada pelo programa.
DISCENTE : RAFAEL RAMON FERREIRA
DATA : 04/11/2016
HORA: 10:00
LOCAL: Auditório do DFTE
TÍTULO:

A quantitative and qualitatively study of the star HD 43587 based on CoRoT Mission data and spectroscopy

PALAVRAS-CHAVES:

Activity, HD 43587, Maunder minimum.

PÁGINAS: 81
GRANDE ÁREA: Ciências Exatas e da Terra
ÁREA: Física
RESUMO:

Among several aspects related to the Sun's activity history, the extended period of the Sun's evolution with a low chromospheric activity level and a low quantity of observed sunspots compared with other epochs, known as Maunder Minimum, remains as a puzzle for the stellar evolution theory.  In this work we study HD 43587 a solar analog star that is a seismic primary target from the CoRoT mission and presents measurements of activity index along 50 yrs by the Mount Wilson program and outher spectroscopic measurements.  Based on the similarity of HD 43587 with the Sun and by using observations collected by the CoRoT satellite as well as data from the literature, our preliminary analysis (Lithium abundance and chromosferic activity) confirms the evolutionary status of HD 43587. The CoRoT light curve indicates also a flat activity profile, that is a indicative of very low chromospheric activity. All this measurements and analysis make this star an excellent Maunder minimum candidate.

MEMBROS DA BANCA:
Externo à Instituição - GUSTAVO ANDRES GUERRERO ERASO - UFMG
Interno - 2496004 - JOSE DIAS DO NASCIMENTO JUNIOR
Presidente - 2887830 - MATTHIEU SEBASTIEN CASTRO