Title: Dynamical mass measurement of the young spectroscopic binary V343 Normae AaAb resolved with the Gemini Planet Imager

Abstract

Here, 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 $${M}_{\mathrm{Aa}}=1.10\pm 0.10\,{M}_{\odot }$$ and $${M}_{\mathrm{Ab}}=0.290\pm 0.018\,{M}_{\odot }$$. 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.

Authors:

Nielsen, Eric L.  ^[1];

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• Search DOE PAGES for ORCID "0000-0001-6975-9056"

De Rosa, Robert J. ^[2]; Wang, Jason ^[2]; Rameau, Julien ^[3]; Song, Inseok  ^[4];

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• Search DOE PAGES for ORCID "0000-0002-5815-7372"

Graham, James R. ^[2]; Macintosh, Bruce  ^[5];

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• Search DOE PAGES for ORCID "0000-0003-1212-7538"

Ammons, Mark ^[6]; Bailey, Vanessa P. ^[5]; Barman, Travis S.  ^[7];

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Bulger, Joanna ^[8]; Chilcote, Jeffrey K. ^[9]; Cotten, Tara  ^[4];

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Doyon, Rene ^[3]; Duchêne, Gaspard ^[10]; Fitzgerald, Michael P. ^[11]; Follette, Katherine B. ^[5]; Greenbaum, Alexandra Z.  ^[12];

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Hibon, Pascale  ^[13];

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Hung, Li -Wei ^[11] more »; Ingraham, Patrick ^[14]; Kalas, Paul ^[2]; Konopacky, Quinn M.  ^[15];

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Larkin, James E. ^[11]; Maire, Jérôme ^[9]; Marchis, Franck  ^[16];

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Marley, Mark S.  ^[17];

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Marois, Christian  ^[18];

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Metchev, Stanimir  ^[19];

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Millar-Blanchaer, Maxwell A.  ^[9];

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Oppenheimer, Rebecca  ^[20];

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Palmer, David W. ^[6]; Patience, Jenny ^[21]; Perrin, Marshall D.  ^[22];

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Poyneer, Lisa A. ^[6]; Pueyo, Laurent ^[22]; Rajan, Abhijith  ^[21];

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Rantakyrö, Fredrik T.  ^[23];

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Savransky, Dmitry  ^[24];

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Schneider, Adam C. ^[25]; Sivaramakrishnan, Anand  ^[22];

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Soummer, Remi  ^[22];

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Thomas, Sandrine ^[14]; Wallace, J. Kent  ^[26];

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Ward-Duong, Kimberly ^[21]; Wiktorowicz, Sloane J.  ^[27];

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Wolff, Schuyler G. ^[12] « less

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+ Show Author Affiliations

1. SETI Institute, Mountain View, CA (United States); Stanford Univ., Stanford, CA (United States)
2. Univ. of California, Berkeley, CA (United States)
3. Univ. de Montreal, Montreal, QC (Canada)
4. Univ. of Georgia, Athens, GA (United States)
5. Stanford Univ., Stanford, CA (United States)
6. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
7. Univ. of Arizona, Tucson, AZ (United States)
8. Subaru Telescope, Hilo, HI (United States)
9. Univ. of Toronto, Toronto, ON (Canada)
10. Univ. of California, Berkeley, CA (United States); Univ. of Grenoble Alpes/CNRS, Grenoble (France)
11. Univ. of California, Los Angeles, CA (United States)
12. Johns Hopkins Univ., Baltimore, MD (United States)
13. European Southern Observatory, Santiago (Chile)
14. Large Synoptic Survey Telescope, Tucson, AZ (United States)
15. Univ. of California, San Diego, La Jolla, CA (United States)
16. SETI Institute, Mountain View, CA (United States)
17. NASA Ames Research Center (ARC), Moffett Field, CA (United States)
18. National Research Council of Canada Herzberg, Victoria, BC (Canada); Univ. of Victoria, Victoria, BC (Canada)
19. The Univ. of Western Ontario, London, ON (Canada); Stony Brook Univ., Stony Brook, NY (United States)
20. American Museum of Natural History, New York, NY (United States)
21. Arizona State Univ., Tempe, AZ (United States)
22. Space Telescope Science Institute, Baltimore, MD (United States)
23. Gemini Observatory, La Serena (Chile)
24. Cornell Univ., Ithaca, NY (United States)
25. Univ. of Toledo, Toledo, OH (United States)
26. California Inst. of Technology (CalTech), Pasadena, CA (United States)
27. The Aerospace Corp., El Segundo, CA (United States)

Publication Date:

Tue Nov 22 00:00:00 EST 2016

Research Org.:

Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)

Sponsoring Org.:

USDOE

OSTI Identifier:

1352126

Report Number(s):

LLNL-JRNL-717862
Journal ID: ISSN 1538-3881; TRN: US1701222

Grant/Contract Number:  

AC52-07NA27344

Resource Type:

Accepted Manuscript

Journal Name:

The Astronomical Journal (Online)

Additional Journal Information:

Journal Name: The Astronomical Journal (Online); Journal Volume: 152; Journal Issue: 6; Journal ID: ISSN 1538-3881

Publisher:

IOP Publishing

Country of Publication:

United States

Language:

English

Subject:

79 ASTRONOMY AND ASTROPHYSICS; planets and satellites: detection; stars: individual (V343 Nor)