<i>HST</i>/COS DETECTION OF THE SPECTRUM OF THE SUBDWARF COMPANION OF KOI-81
<i>HST</i>/COS DETECTION OF THE SPECTRUM OF THE SUBDWARF COMPANION OF KOI-81
KOI-81 is a totally eclipsing binary discovered by the Kepler mission that consists of a rapidly rotating B-type star and a small, hot companion. The system was forged through large-scale mass transfer that stripped the mass donor of its envelope and spun up the mass gainer star. We present an …