000007466 001__ 7466
000007466 005__ 20250204104833.0
000007466 0247_ $$2DOI$$a10.48550/arXiv.2411.14149
000007466 037__ $$aSCART-2025-0097
000007466 100__ $$aGómez-González, V. M. A. 
000007466 245__ $$aX-Shooting ULLYSES: Massive Stars at Low Metallicity X. Physical Parameters and Feedback of Massive Stars in the LMC N11 B Star-Forming Region
000007466 260__ $$c2024
000007466 520__ $$aMassive stars lead the ionization and mechanical feedback within young star-forming regions. The Large Magellanic Cloud (LMC) is an ideal galaxy for studying individual massive stars and quantifying their feedback contribution to the environment. We analyze eight exemplary targets in LMC N11 B from the Hubble UV Legacy Library of Young Stars as Essential Standards (ULLYSES) program, using novel spectra from HST (COS and STIS) in the UV, and from VLT (X-shooter) in the optical. We model the spectra of early to late O-type stars by using state-of-the-art PoWR atmosphere models. We determine the stellar and wind parameters (e.g., T⋆, logg, L⋆ , M ̇ , v∞ ) of the analyzed objects, chemical abundances (C, N, O), ionizing and mechanical feedback (QH , QHe I , QHe II , Lmec ) and X- rays. We report ages of 2 − 4.5 Myr and masses of 30 − 60 M⊙ for the analyzed stars in N11 B, consistent with a scenario of sequential star formation. We note that the observed wind-momentum luminosity relation is consistent with theoretical predictions. We detect nitrogen enrichment in most of the stars, up to a factor of seven. However, we do not find a correlation between nitrogen enrichment and projected rotational velocity. Finally, based on their spectral type, we estimate the total ionizing photons injected from the O-type stars in N11 B into its environment. We report log (Sum QH)= 50.5 ph s−1, log (Sum QHe I)= 49.6 ph s−1 and log (Sum QHe II)= 44.4 ph s−1, consistent with the total ionizing budget in N11.
000007466 594__ $$aNO
000007466 700__ $$aOskinova, L. M. 
000007466 700__ $$aHamann, W. -R. 
000007466 700__ $$aTodt, H. 
000007466 700__ $$aPauli, D. 
000007466 700__ $$aReyero Serantes, S. 
000007466 700__ $$aBernini-Peron, M. 
000007466 700__ $$aSander, A. C.  
000007466 700__ $$aRamachandran, V. 
000007466 700__ $$aVink, J. S. 
000007466 700__ $$aCrowther, P. A. 
000007466 700__ $$aBerlanas, S. R. 
000007466 700__ $$aud-Doula, A. 
000007466 700__ $$aGormaz-Matamala, A. C. 
000007466 700__ $$aKehrig, C. 
000007466 700__ $$aKuiper, R. 
000007466 700__ $$aLeitherer, C. 
000007466 700__ $$aMahy, L. 
000007466 700__ $$aMcLeod, A. F. 
000007466 700__ $$aMehner, A. 
000007466 700__ $$aMorrell, N. 
000007466 700__ $$aShenar, T. 
000007466 700__ $$aTelford, O. G. 
000007466 700__ $$avan Loon, J. Th. 
000007466 700__ $$aTramper, F.  
000007466 700__ $$aWofford, A.
000007466 773__ $$pAstronomy & Astrophysics$$y2024
000007466 8560_ $$flaurent.mahy@ksb-orb.be
000007466 8564_ $$s5662969$$uhttp://publi2-as.oma.be/record/7466/files/Gómez-González_XshootU_2024.pdf
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000007466 905__ $$ain press to
000007466 980__ $$aREFERD