DYNAMICAL MASS MEASUREMENT of the YOUNG SPECTROSCOPIC BINARY V343 NORMAE AaAb RESOLVED with the GEMINI PLANET IMAGER

Eric L. Nielsen, Robert J.De Rosa, Jason Wang, Julien Rameau, Inseok Song, James R. Graham, Bruce Macintosh, Mark Ammons, Vanessa P. Bailey, Travis S. Barman, Joanna Bulger, Jeffrey K. Chilcote, Tara Cotten, Rene Doyon, Gaspard Duchene, Michael P. Fitzgerald, Katherine B. Follette, Alexandra Z. Greenbaum, Pascale Hibon, Li Wei HungPatrick Ingraham, Paul Kalas, Quinn M. Konopacky, James E. Larkin, Jérôme Maire, Franck Marchis, Mark S. Marley, Christian Marois, Stanimir Metchev, Maxwell A. Millar-Blanchaer, Rebecca Oppenheimer, David W. Palmer, Jenny Patience, Marshall D. Perrin, Lisa A. Poyneer, Laurent Pueyo, Abhijith Rajan, Fredrik T. Rantakyrö, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Remi Soummer, Sandrine Thomas, J. Kent Wallace, Kimberly Ward-Duong, Sloane J. Wiktorowicz, Schuyler G. Wolff

Research output: Contribution to journalArticle

17 Scopus citations

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 β Pictoris (β Pic) 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 MAa = 1.10 ± 0.10 M and MAb = 0.290 ± 0.018 M. 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 β Pic moving group. We derive a model-dependent age for the β 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.

Original languageEnglish (US)
Article number175
JournalAstronomical Journal
Volume152
Issue number6
DOIs
StatePublished - Dec 2016

Keywords

  • planets and satellites: detection
  • stars: individual (V343 Nor)

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Nielsen, E. L., Rosa, R. J. D., Wang, J., Rameau, J., Song, I., Graham, J. R., Macintosh, B., Ammons, M., Bailey, V. P., Barman, T. S., Bulger, J., Chilcote, J. K., Cotten, T., Doyon, R., Duchene, G., Fitzgerald, M. P., Follette, K. B., Greenbaum, A. Z., Hibon, P., ... Wolff, S. G. (2016). DYNAMICAL MASS MEASUREMENT of the YOUNG SPECTROSCOPIC BINARY V343 NORMAE AaAb RESOLVED with the GEMINI PLANET IMAGER. Astronomical Journal, 152(6), [175]. https://doi.org/10.3847/0004-6256/152/6/175