We use BPASS to predict frequencies of ejected OB and OBe stars and binaries. We also predict companion frequencies and model distributions of primary & secondary masses & some orbital parameters. (Shoutout to @astro-jje.bsky.social !!)

Using RV measurements, we set constraints on companion masses and in some cases periods, eccentricities and inclinations. Our RV data suggest that OB binaries favor more circular orbits and OBe binaries are eccentric.

This is presenting an RV survey of field OB and OBe stars in the SMC Wing. We ID single and double-lined spectroscopic binaries and binary candidates. We also use TESS light curves to identify new eclipsing binary candidates!