[en] HD 150136 is a hierarchical triple system, non-thermal radio emitter, made of three O stars totalling some 130 solar masses. The 2.67-day inner orbit is rather well-known. Recent works derived a good approximation for the outer orbit with a period of 3000 days. We report here on interferometric observations that allow us to angularly resolve the outer orbit. First evidences for an astrometric displacement are given. The determination of the outer system orbit gives access to the inclinations of the systems and to the masses, including the one of the O3-O3.5 primary star.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Gosset, Eric ; Université de Liège - ULiège > Groupe d'astrophysique des hautes énergies (GAPHE)
Berger, J. P.; European Southern Observatory, Santiago, Chile
Absil, Olivier ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > PSILab
Le Bouquin, J. B.; IPAG, Université Joseph Fourier, Grenoble, France
Sana, H.; Astronomical Institute Anton Pannekoek, Amsterdam, The Netherlands
Mahy, Laurent ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
De Becker, Michaël ; Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS)
Language :
English
Title :
Recent results on the hierarchical triple system HD 150136
