Radial Velocity Evidence for a Post-Mass-Transfer Massive Binary System NaSt1

Kittipong Wangnok, Samaporn Tinyanont, Ryan M. Lau +11

We present multi-epoch high-resolution optical spectroscopy ($R\simeq 80,000$) of the emission-line object NaSt1 to test its proposed binary nature, along with long-term multiba…