General Seminar : Dr. Jens Barosch
Abstract: Presolar stardust grains are tiny and rare components of meteorites. They were produced in the winds and explosions of ancient dying stars and were part of the molecular cloud from which the Solar System formed. By analyzing their compositions, we can learn how stars synthetized elements and their isotopes. Studying presolar grains is also the only known way of directly examining some of the building blocks of the Solar System in the laboratory. They can tell us what type of material and which processes ultimately formed the Sun and planets. In this talk, we will explore a new dataset of presolar grain abundances and multi-element isotopic compositions collected with the Carnegie NanoSIMS. The samples include previously unstudied meteorites and material recently returned from asteroid Ryugu by the Hayabusa2 spacecraft. We will examine what these presolar grains can tell us about their origin and the early evolution of the solar system.
Abstract
Presolar stardust grains are tiny and rare components of meteorites. They were produced in the winds and explosions of ancient dying stars and were part of the molecular cloud from which the Solar System formed. By analyzing their compositions, we can learn how stars synthetized elements and their isotopes. Studying presolar grains is also the only known way of directly examining some of the building blocks of the Solar System in the laboratory. They can tell us what type of material and which processes ultimately formed the Sun and planets. In this talk, we will explore a new dataset of presolar grain abundances and multi-element isotopic compositions collected with the Carnegie NanoSIMS. The samples include previously unstudied meteorites and material recently returned from asteroid Ryugu by the Hayabusa2 spacecraft. We will examine what these presolar grains can tell us about their origin and the early evolution of the solar system.