Gaia EDR3 Reveals the Substructure and Complicated Star Formation History of the Greater Taurus-Auriga Star Forming Complex
Daniel M. Krolikowski, Adam L. Kraus, Aaron C. Rizzuto

TL;DR
Gaia EDR3 data reveals complex substructure and a multi-epoch star formation history in the Taurus-Auriga region, highlighting spatial, kinematic, and age variations among its stellar populations.
Contribution
This study provides the first comprehensive Gaia-based analysis of the Taurus-Auriga complex, identifying substructures and reconstructing its detailed star formation history.
Findings
Taurus is highly substructured with clustered and sparse groups.
Older populations are more dispersed and farther from molecular clouds.
Star formation occurred in at least two distinct epochs.
Abstract
The Taurus-Auriga complex is the prototypical low-mass star forming region, and provides a unique testbed of the star formation process, which left observable imprints on the spatial, kinematic, and temporal structure of its stellar population. Taurus's rich observational history has uncovered peculiarities that suggest a complicated star forming event, such as members at large distances from the molecular clouds and evidence of an age spread. With Gaia, an in-depth study of the Taurus census is possible to confirm membership, identify substructure, and reconstruct its star formation history. We have compiled an expansive census of the greater Taurus region, identifying spatial subgroups and confirming that Taurus is substructured across stellar density. There are two populations of subgroups: clustered groups near the clouds and sparse groups spread throughout the region. The sparse…
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