info:eu-repo/semantics/article
Fundamental parameters of the massive eclipsing binary HM1 8
Fecha
2021-09Registro en:
Rodríguez, C. L.; Ferrero, G. A.; Benvenuto, Omar Gustavo; Gamen, Roberto Claudio; Morrell, Nidia Irene; et al.; Fundamental parameters of the massive eclipsing binary HM1 8; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 508; 2; 9-2021; 2179-2193
0035-8711
CONICET Digital
CONICET
Autor
Rodríguez, C. L.
Ferrero, G. A.
Benvenuto, Omar Gustavo
Gamen, Roberto Claudio
Morrell, Nidia Irene
Barbá, Rodolfo
Arias, J.
Massey, P.
Resumen
We present a comprehensive study of the massive binary system HM1 8, based on multi-epoch high-resolution spectroscopy, V-band photometry, and archival X-ray data. Spectra from the OWN Survey, a high-resolution optical monitoring of Southern O and WN stars, are used to analyse the spectral morphology and perform quantitative spectroscopic analysis of both stellar components. The primary and secondary components are classified as O4.5 IV(f) and O9.7 V, respectively. From a radial velocity (RV) study, we derived a set of orbital parameters for the system. We found an eccentric orbit (e = 0.14 ± 0.01) with a period of P = 5.87820 ± 0.00008 d. Through the simultaneous analysis of the RVs and the V-band light curve, we derived an orbital inclination of 70.0° ± 2.0 and stellar masses of Ma=33.6+1.4−1.2 M⊙ for the primary, and Mb=17.7+0.5−0.7 M⊙ for the secondary. The components show projected rotational velocities vasin i = 105 ± 14 km s−1 and vbsin i = 82 ± 15 km s−1, respectively. A tidal evolution analysis is also performed and found to be in agreement with the orbital characteristics. Finally, the available X-ray observations show no evidence of a colliding winds region; therefore, the X-ray emission is attributed to stellar winds.