Spectroscopy of H alpha-emission-line blue stars in M 33

We present the multiobject spectroscopy for 118 blue stars with an H alpha excess in the galaxy M 33 from the lists of SS 433 and LBV candidates and o ther rare types of massive stars. The H alpha parameters and the relative i ntensities of the [N II] lambda 6584 and [S II] lambda 6716 lines are given . In most objects, the H alpha line is formed (completely or partially) in the H II regions that surround the stars. We identified stars with a broad H alpha emission line, which is probably emitted in the stellar wind. The c orrelation between the objects' morphology in H alpha images and the parame ters of this line in their spectra is discussed. In general, the objects cl assified by the type of image as (diffuse or bubble) nebulae exhibit a cons iderably narrower H alpha line than do objects classified as stars. We desc ribe the spectra of stars No. 41 (an LBV candidate) and No. 35 (a WN nova, a candidate for Ofpe/WN9 stars) in greater detail. The star I322 at the cen ter of the giant H II region NGC 592 can be considered as an SS 433 candida te. The spectra of some X-ray sources are discussed.