Coordenação de Astronomia e Astrofísica - COAA

Descrição do Seminário

Enigmas across the solar system and beyond

Resumo: In this talk I will use the results of numerical simulations to discuss planet formation theories covering aspects of the solar system and exoplanetary systems. I will first discuss the origins of so-called "hot super-Earths". Hot super-Earths (or Mini-Neptunes) have sizes between 1-4 Earths radii (or masses between 1-20 Earth masses). Statistical analyses suggest that super-Earths with orbital periods shorter than 100 days orbit at least ~50% of sun-like stars in our Galaxy. The origins of hot super-Earths remain elusive: Where and how did hot super-Earth systems form and dynamically evolve? I will present a scenario for the formation of close-in super-Earths constrained by their observed dynamical architectures. The second part of my talk will place the solar system in the context of exoplanetary systems by addressing a great enigma: If hot super-Earths are so common, why there is none inside Mercury's orbit? Finally, I will discuss how formation models can address different Solar System mysteries: Why is Mars so small compared with Earth? Why is the asteroid belt so dynamically excited? Why does the solar system have two ice giants? And where did Planet-9 come from?

Palestrante: André Izidoro

Instituto: UNESP

Data: 11/05/2017

Hora: 15:30

Local: Auditório do prédio Emmanuel Liais

Responsável: Luan Ghezzi

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