arXiv 1609.090952016-09-28astro-ph.SR

双子座行星成像仪对年轻光谱双星V343 Normae AaAb的动力学质量测量

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, … 展开作者

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 Hung, Patrick Ingraham, Paul Kalas, Quinn M. Konopacky, James E. Larkin, Jerome 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. Rantakyro, Dmitry Savransky, Adam C. Schneider, Anand Sivaramakrishnan, Remi Soummer, Sandrine Thomas, J. Kent Wallace, Kimberly Ward-Duong, Sloane J. Wiktorowicz, Schuyler G. Wolff

备注：: 12 pages, 7 figures. Accepted to AJ
DOI：: 10.3847/0004-6256/152/6/175

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摘要：

我们提出了新的空间分辨天体测量和测光从双子座行星成像仪的年轻的多星系统V343 Normae，这是一个成员的β Pictureso移动组的内部二进制。室女座V343由一颗K 0和M中的恒星组成，轨道约为4.5年（AaAb），还有一颗宽10”的M5伴星（B）。通过将这些数据与存档的天体测量和径向速度相结合，我们拟合了轨道，并测量了M_Aa = 1.10 +/- 0.10 M_sun和M_Ab = 0.290 +/- 0.018 M_sun两个分量的单个质量。与理论等时线比较，我们发现两个分量的测量质量和JHK带幅度与β Pic移动群的年龄一致。我们得出一个模型依赖的年龄为26 +/- 3百万年的β Pic移动群相结合，我们的结果为V343 Normae与文献测量GJ 3305，这是另一个组成员与解决二进制组件和动力学质量。

英文摘要：

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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