Artículo
Spectroscopic and photometric analysis of the early-type spectroscopic binary HD 161853 in the centre of an H ii region (Research Note)
Gamen, Roberto Claudio
; Putkuri, C.; Morrell, Nidia Irene
; Barba, Rodolfo Hector
; Arias, J. I.; Maíz Apellániz, J.; Walborn, N. R.; Sota, A.; Alfaro, E. J.
Fecha de publicación:
12/2015
Editorial:
Edp Sciences
Revista:
Astronomy And Astrophysics
ISSN:
0004-6361
Idioma:
Inglés
Tipo de recurso:
Artículo publicado
Clasificación temática:
Resumen
Aims. We study the O-type star HD 161853, which has been noted as a probable double-lined spectroscopic binary system.
Methods. We secured high-resolution spectra of HD 161853 during the past nine years. We separated the two components in the system and measured their respective radial velocities for the first time.
Results. We confirm that HD 161853 is an ~1 Ma old binary system consisting of an O8 V star (MA,RV ≥ 22 M⊙) and a B1–3 V star (MB,RV ≥ 7.2 M⊙) at about 1.3 kpc. From the radial velocity curve, we measure an orbital period P = 2.66765 ± 0.00001 d and an eccentricity e = 0.121 ± 0.007. Its V-band light curve is constant within 0.014 mag and does not display eclipses, from which we impose a maximum orbital inclination i = 54 deg. HD 161853 is probably associated with an H ii region and a poorly investigated very young open cluster. In addition, we detect a compact emission region at 50 arcsec to HD 161853 in 22 μm-WISE and 24 μm-Spitzer images, which may be identified as a dust wave piled up by the radiation pressure of the massive binary system.
Palabras clave:
Spectroscopic Binaries
,
Early Type Stars
,
Hd 161853 (Estrella)
Archivos asociados
Licencia
Identificadores
Colecciones
Articulos(IALP)
Articulos de INST.DE ASTROFISICA LA PLATA
Articulos de INST.DE ASTROFISICA LA PLATA
Citación
Gamen, Roberto Claudio; Putkuri, C.; Morrell, Nidia Irene; Barba, Rodolfo Hector; Arias, J. I.; et al.; Spectroscopic and photometric analysis of the early-type spectroscopic binary HD 161853 in the centre of an H ii region (Research Note); Edp Sciences; Astronomy And Astrophysics; 584; 12-2015; 7-11
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