ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT) V: Sample, overview, and demography of disk molecular emission

TL;DR

This paper provides an overview of ALMA-DOT, a survey of molecular emissions in young star disks in Taurus, aiming to understand chemical evolution during planet formation through high-resolution molecular mapping.

Contribution

It introduces the sample and summarizes initial findings on molecular distributions and abundances in young star disks, advancing understanding of disk chemical evolution.

Findings

Mapped spatial distribution of molecules in disks

Determined column densities and abundance ratios

Identified variations in molecular emissions

Abstract

We present an overview of the ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT), a campaign devoted to the characterization of the molecular emission from partly embedded, young stars. The project aims at better understanding the gaseous products that are delivered to planets by means of high-resolution maps of assorted lines probing disks at the time of the planet formation (less than 1 Myr). Nine different molecules are surveyed by our observations of six Class I/flat-spectrum sources. A series of accompanying articles analyze specific targets and molecules. Here we describe the sample and provide a general overview of the results, focusing on the spatial distribution, column densities, and abundance ratios of H$_2$CO, CS, and CN. The results of this work are a first step toward the characterization of the disk chemical evolution that need to be complemented by further observations of less exceptional disks and customized thermo-chemical modeling.