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The Carina star-forming region is one of the largest in the Galaxy, and itsmassive star population is still being unveiled. The large number of starscombined with high, and highly variable, interstellar extinction makes itinherently difficult to find OB stars in this type of young region. We presentthe results of a spectroscopic campaign to study the massive star population ofthe Carina Nebula, with the primary goal to confirm or reject previouslyidentified Carina OB star candidates. A total of 141 known O- and B-type starsand 94 candidates were observed, of which 73 candidates had a high enoughsignal-to-noise ratio to classify. We find 23 new OB stars within the CarinaNebula, a 32% confirmation rate. One of the new OB stars has blended spectraand is suspected to be a double-lined spectroscopic binary (SB2). We alsoreclassify the spectral types of the known OB stars and discover nine new SB2samong this population. Finally, we discuss the spatial distribution of thesenew OB stars relative to known structures in the Carina NSebula.

A Catalog of New Spectroscopically Confirmed Massive OB Stars in Carina