NOAO >   Observing Info >   Approved Programs >   2018A-0158

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Program Information for 2018A-0158


PI: Cyprien Lanthermann, Universitee Grenoble Alpes, lantherc@univ-grenoble-alpes.fr
Address: IPAG, 414 rue de la Piscine, Saint Martin d'Heres 38400 France

CoI: H Sana, Katholieke Universiteit Leuven
CoI: J B Le Bouquin, Universitee Grenoble Alpes
CoI: Gosset Eric, Universite de Liege, Belgium
CoI: A Rainot, Katholieke Universiteit Leuven
CoI: F Tramper, ESA - Madrid, Spain
CoI: L Mahy, Universite de Liege, Belgium
CoI: Michael De Becker, Universite de Liege, Belgium
CoI: Olivier Absil, Universite de Liege, Belgium

Title: Northern Massive Stars at High Angular Resolution

Abstract: The aim of our team is to characterize the intrinsic multiplicity of massive stars in order to shed new light onto their formation mechanisms and evolutionary paths. Our observational constraints are the distributions of separation, mass ratio, and eccentricity; as well as the number of triple and high order systems. Because massive stars are far away, mapping the entire range of separation requires radial- velocity, optical interferometry, and adaptive optics imaging. In the Southern hemisphere, we concluded our multi-technique large program in 2014 (see results below). In the Northern hemisphere, radial-velocities and adaptive-optics database already exist. We need to complement them with optical interferometry at CHARA. For this period, we propose to verify the feasibility of the project on a sub-sample of 29 O-type stars, in order to build an optimised 'long term status' proposal for next periods.

Program Type: Standard/Galactic

Scheduled Nights:
Run 2 (2018A):  CHARA/MIRC -- 60hrs


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NOAO >   Observing Info >   Approved Programs >   2018A-0158

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