Dynamical Mass Measurement of the Young Spectroscopic Binary V343 Normae AaAb Resolved With the Gemini Planet Imager
Abstract
We present new spatially resolved astrometry and photometry from the Gemini Planet Imager of the inner binary of the young multiple star system V343 Normae, which is a member of the beta Pictoris moving group. V343 Normae comprises a K0 and mid-M star in a ~4.5 year orbit (AaAb) and a wide 10" M5 companion (B). By combining these data with archival astrometry and radial velocities we fit the orbit and measure individual masses for both components of M_Aa = 1.10 +/- 0.10 M_sun and M_Ab = 0.290 +/- 0.018 M_sun. Comparing to theoretical isochrones, we find good agreement for the measured masses and JHK band magnitudes of the two components consistent with the age of the beta Pic moving group. We derive a model-dependent age for the beta Pic moving group of 26 +/- 3 Myr by combining our results for V343 Normae with literature measurements for GJ 3305, which is another group member with resolved binary components and dynamical masses.
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Cite
@article{arxiv.1609.09095,
title = {Dynamical Mass Measurement of the Young Spectroscopic Binary V343 Normae AaAb Resolved With the Gemini Planet Imager},
author = {Eric L. Nielsen and Robert J. De Rosa and Jason Wang and Julien Rameau and Inseok Song and James R. Graham and Bruce Macintosh and Mark Ammons and Vanessa P. Bailey and Travis S. Barman and Joanna Bulger and Jeffrey K. Chilcote and Tara Cotten and Rene Doyon and Gaspard Duchene and Michael P. Fitzgerald and Katherine B. Follette and Alexandra Z. Greenbaum and Pascale Hibon and Li-Wei Hung and Patrick Ingraham and Paul Kalas and Quinn M. Konopacky and James E. Larkin and Jerome Maire and Franck Marchis and Mark S. Marley and Christian Marois and Stanimir Metchev and Maxwell A. Millar-Blanchaer and Rebecca Oppenheimer and David W. Palmer and Jenny Patience and Marshall D. Perrin and Lisa A. Poyneer and Laurent Pueyo and Abhijith Rajan and Fredrik T. Rantakyro and Dmitry Savransky and Adam C. Schneider and Anand Sivaramakrishnan and Remi Soummer and Sandrine Thomas and J. Kent Wallace and Kimberly Ward-Duong and Sloane J. Wiktorowicz and Schuyler G. Wolff},
journal= {arXiv preprint arXiv:1609.09095},
year = {2016}
}
Comments
12 pages, 7 figures. Accepted to AJ