Artículo
Spectroscopic study of the extremely young O-type triple system Herschel 36 A in the Hourglass nebula - I. Orbital properties
Campillay, Abdo R.; Arias, Julia Ines
; Barba, Rodolfo Héctor
; Morrell, Nidia Irene
; Gamen, Roberto Claudio
; Maíz Apellániz, Jesús
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
![Icon](/themes/CONICETDigital/images/conicet.png)
Fecha de publicación:
05/01/2019
Editorial:
Wiley Blackwell Publishing, Inc
Revista:
Monthly Notices of the Royal Astronomical Society
ISSN:
0035-8711
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
We present a detailed spectroscopic study of Herschel 36 A (H36A), the main stellar component of the massive multiple system Herschel 36 in the Hourglass nebula, based on high-resolution optical spectra obtained along an 11 yr span. The three stellar components present in the spectrum of H36A are separated by means of a spectral disentangling technique. Individual spectral classifications are improved, and high-precision orbital solutions for the inner and outer orbits are calculated. H36A is confirmed to be a hierarchical triple system composed of a close massive binary (Ab1 + Ab2, O9.5 V + B0.7 V) in wide orbit around a third O-type star (Aa, O7.5 Vz). The inner-pair orbit is characterized by a period of 1.54157 ± 0.00006 d, and semi-amplitudes of 181.2 ± 0.7 and 295.4 ± 1.7 km s−1. The outer orbit has a period of 492.81 ± 0.69 d, and semi-amplitudes of 62.0 ± 0.6 and 42.4 ± 0.8 km s−1. The inner and outer orbits are not coplanar, having a relative inclination of at least 20◦. Dynamical minimum masses of 20.6 ± 0.8 M☉, 18.7 ± 1.1 M☉, and 11.5 ± 1.1 M☉ are derived for the Aa, Ab1, and Ab2 components, respectively, in reasonable agreement with the theoretical calibrations.
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IALP)
Articulos de INST.DE ASTROFISICA LA PLATA
Articulos de INST.DE ASTROFISICA LA PLATA
Citación
Campillay, Abdo R.; Arias, Julia Ines; Barba, Rodolfo Héctor; Morrell, Nidia Irene; Gamen, Roberto Claudio; et al.; Spectroscopic study of the extremely young O-type triple system Herschel 36 A in the Hourglass nebula - I. Orbital properties; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 484; 2; 5-1-2019; 2137-2147
Compartir
Altmétricas