Determine the systemic radial velocity of Berkeley 30

Determine a reliable mean systemic radial velocity for the open cluster Berkeley 30 by obtaining and analyzing spectroscopic observations or compiling consistent literature measurements, so that robust kinematic membership assessment can be performed for this cluster.

Background

In the kinematic membership analysis, the authors compare their Gaussian fits of radial velocity distributions with reference cluster radial velocities from the literature. For most clusters, published mean radial velocities are available to guide the selection and validation of members.

For Berkeley 30, however, the authors note the absence of any prior radial velocity measurement in the literature, which complicates external validation of the kinematic selection and motivates the need for an explicit determination of the cluster’s systemic radial velocity.