Seminário da Astronomia do ON fala sobre populações estelares em aglomerados globulares

Na quinta-feira, dia 22 de maio, a Coordenação de Astronomia e Astrofísica (COAST) do Observatório Nacional (ON/MCTI) realizará uma nova edição de seu seminário. 

O evento ocorrerá às 14h30 (horário de Brasília) no auditório Yeda Ferraz. O tema será “Multiple stellar populations in globular clusters: The case of NGC 2808”. Para falar sobre o assunto, foi convidada a pesquisadora do ON, Dra. Marília Carlos

Title: Multiple stellar populations in globular clusters: The case of NGC 2808

Abstract: In the past 15 years, the overwhelming observational evidence of multiple stellar populations in globular clusters (GCs) has challenged the idea that a GC consists of stars born at the same time out of the same material. I will discuss the methods and tools to investigate the different populations of stars in GCs, from the point of view of photometry and high resolution spectroscopy, in an effort to shed light on the mechanisms behind the formation of multiple stellar populations. I will then present and discuss detailed chemical abundances of NGC 2808, one of the most massive GCs in our Galaxy, hosting at least five different stellar populations.