Artículos de revistas
Optical spectroscopy of X-Mega targets in the Carina nebula, VII: on the multiplicity of Tr 16-112, HD 93343 and HD 93250
Fecha
2009-09Registro en:
Rauw, G.; Nazé, Y.; Fernandez Lajus, Eduardo Eusebio; Lanotte, A.; Solivella, Gladys Rebeca; et al.; Optical spectroscopy of X-Mega targets in the Carina nebula, VII: on the multiplicity of Tr 16-112, HD 93343 and HD 93250; Wiley Blackwell Publishing, Inc; Monthly Notices of the Royal Astronomical Society; 398; 3; 9-2009; 1582-1592
0035-8711
CONICET Digital
CONICET
Autor
Rauw, G.
Nazé, Y.
Fernandez Lajus, Eduardo Eusebio
Lanotte, A.
Solivella, Gladys Rebeca
Sana, H.
Gosset, E.
Resumen
We present the results of a spectroscopic monitoring campaign devoted to three O-type stars in the Carina nebula. We derive the full SB2 orbital solution of the binary system Tr 16-112, an exceptional dissymmetrical system consisting of an O5.5–6 V((f+?p)) primary and a B2 V-III secondary. We also report on low-amplitude brightness variations in Tr 16-112 that are likely due to the ellipsoidal shape of the O5.5–6 primary revolving in an eccentric orbit around the system’s centre of mass. We detect for the first time a clear SB2 binary signature in the spectrum of HD 93343 (O8 + O8), although our data are not sufficient to establish an orbital solution. This system also displays low-amplitude photometric modulations. On the other hand, no indication of multiplicity is found in the optical spectra of HD 93250. Finally, we discuss the general properties of multiple massive stars in the Carina OB1 association.