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Journal Articles The Astrophysical Journal Letters Year : 2016

Discovery of a Substellar Companion to the Nearby Debris Disk Host HR 2562

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Quinn M. Konopacky
  • Function : Author
Julien Rameau
  • Function : Author
Joseph C. Filippazzo
  • Function : Author
Paige A. Giorla Godfrey
  • Function : Author
Christian Marois
Eric L. Nielsen
  • Function : Author
Laurent Pueyo
  • Function : Author
Roman R. Rafikov
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Emily L. Rice
  • Function : Author
Jason J. Wang
  • Function : Author
S. Mark Ammons
  • Function : Author
Vanessa P. Bailey
  • Function : Author
Travis S. Barman
  • Function : Author
Joanna Bulger
  • Function : Author
Sebastian Bruzzone
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Jeffrey K. Chilcote
  • Function : Author
Tara Cotten
  • Function : Author
Rebekah I. Dawson
  • Function : Author
Robert J. de Rosa
  • Function : Author
René Doyon
Thomas M. Esposito
  • Function : Author
Michael P. Fitzgerald
  • Function : Author
Katherine B. Follette
  • Function : Author
Stephen Goodsell
  • Function : Author
James R. Graham
  • Function : Author
Alexandra Z. Greenbaum
  • Function : Author
Pascale Hibon
  • Function : Author
Li-Wei Hung
  • Function : Author
Patrick Ingraham
  • Function : Author
Paul Kalas
David Lafrenière
James E. Larkin
  • Function : Author
Bruce A. Macintosh
  • Function : Author
Jérôme Maire
  • Function : Author
Franck Marchis
Mark S. Marley
  • Function : Author
Brenda C. Matthews
  • Function : Author
Stanimir Metchev
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Maxwell A. Millar-Blanchaer
  • Function : Author
Rebecca Oppenheimer
  • Function : Author
David W. Palmer
  • Function : Author
Jenny Patience
  • Function : Author
Marshall D. Perrin
Lisa A. Poyneer
  • Function : Author
Abhijith Rajan
  • Function : Author
Fredrik T. Rantakyrö
  • Function : Author
Dmitry Savransky
  • Function : Author
Adam C. Schneider
  • Function : Author
Anand Sivaramakrishnan
  • Function : Author
Inseok Song
  • Function : Author
Remi Soummer
  • Function : Author
Sandrine Thomas
  • Function : Author
J. Kent Wallace
  • Function : Author
Kimberly Ward-Duong
  • Function : Author
Sloane J. Wiktorowicz
  • Function : Author
Schuyler G. Wolff
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Abstract

We present the discovery of a brown dwarf companion to the debris disk host star HR 2562. This object, discovered with the Gemini Planet Imager (GPI), has a projected separation of 20.3 ± 0.3 au (0\buildrel{\prime\prime}\over{.} 618+/- 0\buildrel{\prime\prime}\over{.} 004) from the star. With the high astrometric precision afforded by GPI, we have confirmed, to more than 5σ, the common proper motion of HR 2562B with the star, with only a month-long time baseline between observations. Spectral data in the J-, H-, and K-bands show a morphological similarity to L/T transition objects. We assign a spectral type of L7 ± 3 to HR 2562B and derive a luminosity of log(L {}{bol}/{L})=-4.62+/- 0.12, corresponding to a mass of 30 ± 15 {M}{Jup} from evolutionary models at an estimated age of the system of 300-900 Myr. Although the uncertainty in the age of the host star is significant, the spectra and photometry exhibit several indications of youth for HR 2562B. The source has a position angle that is consistent with an orbit in the same plane as the debris disk recently resolved with Herschel. Additionally, it appears to be interior to the debris disk. Though the extent of the inner hole is currently too uncertain to place limits on the mass of HR 2562B, future observations of the disk with higher spatial resolution may be able to provide mass constraints. This is the first brown-dwarf-mass object found to reside in the inner hole of a debris disk, offering the opportunity to search for evidence of formation above the deuterium burning limit in a circumstellar disk.

Dates and versions

insu-03691502 , version 1 (09-06-2022)

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Cite

Quinn M. Konopacky, Julien Rameau, Gaspard Duchêne, Joseph C. Filippazzo, Paige A. Giorla Godfrey, et al.. Discovery of a Substellar Companion to the Nearby Debris Disk Host HR 2562. The Astrophysical Journal Letters, 2016, 829, ⟨10.3847/2041-8205/829/1/L4⟩. ⟨insu-03691502⟩
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