A Multiwavelength Study of High Mass X-ray Binary Candidates in M33

We present a multi-wavelength study of the population of high mass X-ray binaries (HMXBs) in the nearby galaxy, M33. We combine overlapping observations in the inner disk of M33 from the Hubble Space Telescope (HST; near IR, optical, and near UV), Chandra X-ray Observatory (Chanra; soft X-ray), and Nuclear Spectroscopic Telescope Array (NuSTAR; hard X-ray). HMXB candidates were identified using the optical and UV imaging and photometry from the HST observations to identify massive stars associated with sources in the Chandra and/or NuSTAR catalogs. We use spatially resolved star formation history (SFH) measurements of the locations of the HMXB candidates to constrain the age distribution and infer the HMXB production rate. Our measurements provide new observational constraints on theoretical models of massive binary stellar evolution.