Seminário 27/08 - sexta-feira

Na próxima sexta-feira, dia 27/08 às 10h, teremos o seminário de Cristina Furlanetto (UFRGS), intitulado: "Small fuzzy satellites in the Local Universe: testing dark matter and galaxy formation with low surface brightness dwarfs"

Link: https://us02web.zoom.us/j/87309346620?pwd=YzdCLzJCRVhkb0tuSGJiV1dHSk9pUT09

Observem o novo horário dos seminários.

Contamos com a presença de todos!

Título: Small fuzzy satellites in the Local Universe: testing dark matter and galaxy formation with low surface brightness dwarfs

Resumo: Understanding the formation and evolution of faint dwarf galaxies, as well as their dark matter content and connection to the broader galaxy population is fundamental to the development/settlement of a robust theory of galaxy formation in small scales. Since the recent discovery of a population of large low surface brightness galaxies rich in globular clusters in Coma termed "ultra diffuse galaxies" (UDGs), there has been a revival and growing interest in the field of low surface brightness (LSB) dwarf galaxies, which were known since the 1980s. Much of the interest comes from their broad variety of dynamical mass-to-light ratios, ranging from dark matter dominated systems to dark matter deficient objects. The LSB dwarfs have been observed predominantly (but not exclusively) in groups and clusters, and their properties have been found to vary according to the environment. In this talk I will present the search and investigation of LSB dwarfs around the low-density environment of NGC3115, the closest S0 to the Galaxy. We carefully analyse the structure and morphology of 24 candidates, 18 of which are reported for the first time. We analyse the globular cluster (GC) candidate populations of our LSB dwarf sample and find that 6 appear to host GCs, with numbers compatible with literature samples of LSB dwarfs of the same luminosity. We speculate that low-density environments are less prone to produce higher mass LSB dwarfs.