X-Shooting ULLYSES: Massive stars at low metallicity: X. Physical parameters and feedback of massive stars in the LMC N11 B star-forming region

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F25%3A00618570" target="_blank" >RIV/67985815:_____/25:00618570 - isvavai.cz</a>

Výsledek na webu

<a href="https://hdl.handle.net/11104/0366073" target="_blank" >https://hdl.handle.net/11104/0366073</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1051/0004-6361/202451366" target="_blank" >10.1051/0004-6361/202451366</a>

Jazyk výsledku

angličtina

Název v původním jazyce

X-Shooting ULLYSES: Massive stars at low metallicity: X. Physical parameters and feedback of massive stars in the LMC N11 B star-forming region

Popis výsledku v původním jazyce

Massive stars drive 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 using state-of-the-art PoWR atmosphere models. We determine the stellar and wind parameters (e.g., T-star, log g, L-star, M, and v(infinity)) of the analyzed objects, chemical abundances (C, N, and O), ionizing and mechanical feedback (Q(H), Q(HeI), Q(He II), and L-mec), and X-rays. We report ages of 2-4.5 Myr and masses of 30-60 M-circle dot for the analyzed stars in N11 B, which are 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 by up to a factor of seven in most of the stars. 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 (Sigma Q(H)) = 50.5 ph s(-1), log (Sigma Q(He I)) = 49.6 ph s(-1), and log (Sigma Q(He II))= 44.4 ph s(-1), consistent with the total ionizing budget in N11.

Název v anglickém jazyce

X-Shooting ULLYSES: Massive stars at low metallicity: X. Physical parameters and feedback of massive stars in the LMC N11 B star-forming region

Popis výsledku anglicky

Massive stars drive 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 using state-of-the-art PoWR atmosphere models. We determine the stellar and wind parameters (e.g., T-star, log g, L-star, M, and v(infinity)) of the analyzed objects, chemical abundances (C, N, and O), ionizing and mechanical feedback (Q(H), Q(HeI), Q(He II), and L-mec), and X-rays. We report ages of 2-4.5 Myr and masses of 30-60 M-circle dot for the analyzed stars in N11 B, which are 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 by up to a factor of seven in most of the stars. 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 (Sigma Q(H)) = 50.5 ph s(-1), log (Sigma Q(He I)) = 49.6 ph s(-1), and log (Sigma Q(He II))= 44.4 ph s(-1), consistent with the total ionizing budget in N11.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Astronomy & Astrophysics

ISSN

0004-6361

e-ISSN

1432-0746

Svazek periodika

695

Číslo periodika v rámci svazku

March

Stát vydavatele periodika

FR - Francouzská republika

Počet stran výsledku

18

Strana od-do

A197

Kód UT WoS článku

001448085200006

EID výsledku v databázi Scopus

2-s2.0-105000992265