ALMA Recounts of Cosmic Conundrums

The European ARC network is launching the new virtual talk series "ALMA recounts of Cosmic Conundrums". In every talk of this series a major astronomical question is discussed. The invited speaker will describe the context of the question and then focuses on the ALMA contribution to the field, past and future. The aim of the series is to highlight the unparalleled contribution of ALMA to the broader astronomical landscape and to provide an outlook towards the future. 

The first talk of this series will take place December 1 at 14:00 CET. The talks will be broadcasted through the Youtube channel of the European ALMA Regional Centre network and will remain available on the same channel afterwards.

How does dust enrichment around evolved stars work?

The first talk of the series will be presented by Leen Decin (KU Leuven), on December 1st at 14:00 CET, and can be view on the Youtube channel of the European ALMA Regional Centre network

 

Flecks of extraterrestrial dust, all over the roof - The story of their cosmic makeup

After decades of failures and misunderstandings, scientists have solved a cosmic riddle — what happens to the tons of dust particles that hit the Earth every day but seldom if ever get discovered in the places that humans know best, like buildings and parking lots, sidewalks and park benches. The answer? Nothing. Look harder. The tiny flecks are everywhere, all over the roof. The morphology of these flecks - micrometeorites - is a first hint of their extraterrestrial origin, the determination of their chemical makeup is the decisive making body. But how is that cosmic dust formed? What important clues on stellar evolution are hidden in these extraterrestrial flecks? What do these microscopic samples supported by astronomical observations tell us about the future evolution of our own Sun, and how life on Earth might change in a few billion years from now? In this talk, I will discuss how interdisciplinary research linking astronomy and chemistry – `astrochemistry’ – can reveal the true formation pathways of these little grains, thereby combining the three fundamental axes of (astro)physical research: observations, theoretical models, and laboratory experiments. During the talk, I will specifically highlight the crucial role of ALMA observations in disclosing the nucleation histories of ageing Sun-like stars.

Schedule

Date

Question

Speaker

December 1, 2021

14:00 CET

How does dust enrichment around evolved stars work? Leen Decin (KU Leuven)

January 12, 2022

14:00 CET

What is the coupling between molecular clouds, star formation and stellar feedback? Eva Schinnerer (MPIA Heidelberg)

February 2, 2022

14:00 CET

How does the dynamics of galaxies evolve over cosmic time?    Francesca Rizzo (DAWN Kopenhagen)

March 2, 2022

14:00 CET

How are the building blocks of life formed? Izaskun Jiménez-Serra (Centro de Astrobiología)

April 6, 2022

14:00 CEST

What is the role of filaments in star formation and how are they shaped?   
Alvaro Hacar (University of Vienna)

May 4, 2022

14:00 CEST

How and when does planet-formation happen in disks? Marco Tazzari (University of Cambridge)

June 1, 2022

14:00 CEST

What do comets tell us about the origin of Earth? Nicolas Biver (Observatoire Paris-Site de Meudon)

If you have any questions contact the European ARC network through the ALMA helpdesk.