Revisiting the Orbital Parameters for the XO-3 System
POSTER
Abstract
We present 12 new transit light curves, and 16 new out-of-transit radial velocity measurements for the XO-3 system. By modelling our newly collected measurements, together with archived photometric and Doppler velocimetric data, we confirmed the unusual configuration of the XO-3 system, containing a rather massive planet in a relatively eccentric and shortperiod orbit around a massive star Furthermore, we find no strong evidence for a temporal change of either Vsini (and by extension, the stellar spin vector of XO-3), or the transit profile (and thus orbital angular momentum vector of XO-3b). We conclude that the discrepancy in previous Rossiter-McLaughlin measurements may have stemmed from observational noise.
*I would like to thank my advisers Songhu Wang and Greg Laughlin as well as the First Year STEM Fellowship at Yale University.
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