Wolf-Rayet stars in the Antennae unveiled by MUSE

DOI: 
10.1093/mnras/staa3304
Publication date: 
01/01/2021
Main author: 
Gómez-González, V. M. A.
IAA authors: 
Guerrero, M. A.
Authors: 
Gómez-González, V. M. A.;Mayya, Y. D.;Toalá, J. A.;Arthur, S. J.;Zaragoza-Cardiel, J.;Guerrero, M. A.
Journal: 
Monthly Notices of the Royal Astronomical Society
Refereed: 
Yes
Publication type: 
Article
Pages: 
2076-2095
Abstract: 
We present the analysis of archival Very Large Telescope (VLT) Multi Unit Spectroscopic Explorer (MUSE) observations of the interacting galaxies NGC 4038/39 (a.k.a. the Antennae) at a distance of 18.1 Mpc. Up to 38 young star-forming complexes with evident contribution from Wolf-Rayet (WR) stars are unveiled. We use publicly available templates of Galactic WR stars in conjunction with available photometric extinction measurements to quantify and classify the WR population in each star-forming region, on the basis of its nearly Solar oxygen abundance. The total estimated number of WR stars in the Antennae is 4053 ± 84, of which there are 2021 ± 60 WNL and 2032 ± 59 WC-types. Our analysis suggests a global WC to WN-type ratio of 1.01 ± 0.04, which is consistent with the predictions of the single star evolutionary scenario in the most recent BPASS stellar population synthesis models.
Database: 
ADS
SCOPUS
URL: 
https://ui.adsabs.harvard.edu/#abs/2021MNRAS.500.2076G/abstract
ADS Bibcode: 
2021MNRAS.500.2076G
Keywords: 
stars: emission-line;stars: evolution;stars: massive;stars: Wolf-Rayet;galaxies: individual (NGC 4038/39);Astrophysics - Astrophysics of Galaxies