Searching for new young stars in the northern hemisphere: The Pisces Moving Group

TL;DR

This study identifies 17 new young stars in the northern hemisphere and provides evidence for a new kinematic group, the Pisces Moving Group, with an age of 30-50 million years, using optical spectra and kinematic analysis.

Contribution

It introduces the Pisces Moving Group as a new young stellar association in the northern hemisphere based on spectroscopic and kinematic data.

Findings

Identified 17 new young, likely single stars under 200 Myr.

Established the existence of the Pisces Moving Group with coherent kinematics.

Members are approximately 30-50 Myr old and lithium-rich.

Abstract

Using the kinematically unbiased technique described in Binks, Jeffries & Maxted (2015), we present optical spectra for a further 122 rapidly-rotating (rotation periods < 6 days), X-ray active FGK stars, selected from the SuperWASP survey. We identify 17 new examples of young, probably single stars with ages of < 200 Myr and provide additional evidence for a new northern hemisphere kinematic association: the Pisces Moving Group (MG). The group consists of 14 lithium-rich G- and K-type stars, that have a dispersion of only $\sim $3 kms$^{-1}$ in each Galactic space velocity coordinate. The group members are approximately co-eval in the colour-magnitude diagram, with an age of 30-50 Myr, and have similar, though not identical, kinematics to the Octans-Near MG.