Internal and relative motions of the Taurus and Ophiuchus star-forming regions

TL;DR

This study analyzes the internal and relative motions of Taurus and Ophiuchus star-forming regions, revealing no expansion or contraction but detecting global rotation, implying a shared origin possibly linked to Gould's Belt.

Contribution

It provides new insights into the kinematic behavior of these regions, highlighting the presence of rotation and suggesting a common origin.

Findings

No evidence for expansion or contraction.

Detection of global rotation.

Possible link to Gould's Belt origin.

Abstract

We investigate the internal and relative motions of the Taurus and Ophiuchus star-forming regions using a sample of young stars with accurately measured radial velocities and proper motions. We find no evidence for expansion or contraction of the Taurus complex, but a clear indication for a global rotation, resulting in velocity gradients, this suggests a common origin, possibly related to that of Gould's Belt.