Radial Velocities of Six OB Stars

TL;DR

This study reports new radial velocity measurements for six bright OB stars, identifying potential binary systems and stellar activity, with some stars showing significant velocity variations linked to disks, pulsations, or winds.

Contribution

First detailed radial velocity measurements for six OB stars with little prior data, highlighting possible binarity and stellar activity indicators.

Findings

HD 45314 may be a long-period binary.

HD 60848 shows velocity variations possibly due to pulsations.

HD 61827 exhibits wind-related velocity changes.

Abstract

We present new results from a radial velocity study of six bright OB stars with little or no prior measurements. One of these, HD 45314, may be a long-period binary, but the velocity variations of this Be star may be related to changes in its circumstellar disk. Significant velocity variations were also found for HD 60848 (possibly related to nonradial pulsations) and HD 61827 (related to wind variations). The other three targets, HD 46150, HD 54879, and HD 206183, are constant velocity objects, but we note that HD 54879 has H$\alpha$ emission that may originate from a binary companion. We illustrate the average red spectrum of each target.