Enlightening the chemistry of infalling envelopes and accretion disks around Sun-like protostars: the ALMA FAUST project

TL;DR

The FAUST project uses ALMA observations to study the chemical diversity of envelopes and disks around Sun-like protostars at 50 au scales, aiming to understand early planetary system formation.

Contribution

It introduces a large survey of Solar-like protostars focusing on their chemical composition at small scales, creating a comprehensive database for star formation and astrochemistry.

Findings

Homogeneous database of molecular images for protostars

Quantitative analysis of chemical diversity at 50 au scales

Insights into organic complexity and ionization in protostellar environments

Abstract

The huge variety of planetary systems discovered in recent decades likely depends on the early history of their formation. In this contribution we introduce the FAUST Large Program, which focuses specifically on the early history of Solar-like protostars and their chemical diversity at scales of $\sim$ 50 au, where planets are expected to form. In particular, the goal of the project is to reveal and quantify the variety of chemical composition of the envelope/disk system at scales of 50 au in a sample of Class 0 and I protostars representative of the chemical diversity observed at larger scales. For each source, we propose a set of molecules able to: (1) disentangle the components of the 50-2000 au envelope/disk system; (2) characterise the organic complexity in each of them; (3) probe their ionization structure; (4) measure their molecular deuteration. The output will be a homogeneous database of thousands of images from different lines and species, i.e., an unprecedented source-survey of the chemical diversity of Solar-like protostars. FAUST will provide the community with a legacy dataset that will be a milestone for astrochemistry and star formation studies.