# Radial velocity dispersions of star groups in M 67

## TL;DR

This study measures radial velocity dispersions in M 67 star groups, confirming a previously detected feature and discussing future improvements with Gaia data.

## Contribution

It provides high-precision radial velocity measurements of M 67 members and confirms a specific velocity feature in one star group.

## Key findings

- Confirmed the velocity feature in Group 60
- Measured radial velocity dispersions in M 67
- Discussed future Gaia-based studies

## Abstract

High-precision measurements of radial velocities of the M 67 cluster members are used to calculate the radial-velocity dispersions in the stellar groups found earlier in the cluster's corona. The previously detected feature in one of the groups (Group 60) consisting of stars with almost identical space velocities was confirmed. The possibility of more accurate future studies of the parameters of star groups using the Gaia catalogues is discussed.