NOAO >   Observing Info >   Approved Programs >   2015A-0133

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Proposal Information for 2015A-0133


PI: Noel Richardson, Universite de Montreal, richardson@astro.umontreal.ca
Address: Physique, C.P. 6128, Succ. Centre-Ville, Montreal, Quebec H3C3J7, Canada

CoI: Anthony Moffat, Universite de Montreal
CoI: Tahina Ramiaramanantsoa, Universite de Montreal
CoI: Grant Hill, W. M. Keck Observatory
CoI: Peter Tuthill, University of Sydney
CoI: Nicole St-Louis, Universite de Montreal
CoI: Andre-Nicolas Chene, Gemini Observatory
CoI: Olivier Schnurr, Leibniz-Institut für Astrophysik Potsdam (AIP)
CoI: Bernard Heathcote, Barfold Observatory
CoI: Emily Aldoretta, Universite de Montreal
CoI: Melissa Munoz, Universite de Montreal
CoI: Herbert Pablo, Universite de Montreal
CoI: Michael Corcoran, USRA and NASA Goddard

Title: The Spectroscopic Variability of the Rosetta Stone Binary gamma Velorum

Abstract: (gamma)^2 Vel is a Rosetta Stone for our understanding of the post- main sequence evolution of massive stars and binaries. The two stars both have strong winds, with a Wolf-Rayet and O star components. Due to its proximity, it is the brightest WR star in the sky, and the orbit has been visually resolved, leading to precise mass measurements. The star will be a target of the \it BRIght Target Explorer (BRITE) - Constellation) during the upcoming period of 2014 November-2015 May. We propose a long time-series of high-resolution, high-signal-to-noise spectroscopy to constrain the physics in the system. These observations will allow us to combine simultaneous photometry, spectroscopy, and interferometry to constrain the processes for colliding winds, and the variability of Wolf-Rayet stars.


National Optical Astronomy Observatory, 950 North Cherry Avenue, P.O. Box 26732, Tucson, Arizona 85726, Phone: (520) 318-8000, Fax: (520) 318-8360



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