Line luminosities of Galactic and Magellanic Cloud Wolf–Rayet stars

ABSTRACT We provide line luminosities and spectroscopic templates of prominent optical emission lines 133 Galactic Wolf–Rayet (WR) stars by exploiting Gaia DR3 parallaxes spectrophotometry, comparisons with 112 counterparts in the Magellanic Clouds. Average broad blue (He ii λ4686, C iii λλ4647,51, N λλ4634,41, v λλ4603,20) yellow (C iv λλ5801,12) features for WN, WN/C, WC, WO have application characterizing WR populations star-forming regions distant, unresolved galaxies. Early-type WN reveal lower more metal-poor environments, but situation is less clear late-type stars. LMC WC4–5 are higher than their Milky Way counterparts, Cloud highlight other lines, λλ3478,85 WN/C stars, O λλ3403,13 WC vi λλ3811,34 apply our calibrations to representative metal-rich galaxies, IC 4870 NGC 3049, respectively, spectral also applied based on a realistic mix subtypes. Finally, global λλ5801,12 Large Clouds or LMCs (Small Clouds) 2.6 × 1038 erg s−1 (9 1036 s−1) 8.8 1037 (4 s−1), cumulative luminosity estimated be an order magnitude LMC.