1-2.4 μm Near-IR Spectrum of the Giant Planet β Pictoris b Obtained with the Gemini Planet Imager - Archive ouverte HAL Access content directly
Journal Articles The Astronomical Journal Year : 2017

1-2.4 μm Near-IR Spectrum of the Giant Planet β Pictoris b Obtained with the Gemini Planet Imager

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Jeffrey Chilcote
Laurent Pueyo
  • Function : Author
Robert J. de Rosa
  • Function : Author
Jeffrey Vargas
  • Function : Author
Bruce Macintosh
Vanessa P. Bailey
  • Function : Author
Travis Barman
  • Function : Author
Brian Bauman
  • Function : Author
Sebastian Bruzzone
  • Function : Author
Joanna Bulger
  • Function : Author
Adam S. Burrows
  • Function : Author
Andrew Cardwell
  • Function : Author
Christine H. Chen
  • Function : Author
Tara Cotten
  • Function : Author
Daren Dillon
  • Function : Author
Rene Doyon
  • Function : Author
Zachary H. Draper
  • Function : Author
Jennifer Dunn
  • Function : Author
Darren Erikson
  • Function : Author
Michael P. Fitzgerald
  • Function : Author
Katherine B. Follette
  • Function : Author
Donald Gavel
  • Function : Author
Stephen J. Goodsell
  • Function : Author
James R. Graham
  • Function : Author
Alexandra Z. Greenbaum
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Markus Hartung
  • Function : Author
Pascale Hibon
  • Function : Author
Li-Wei Hung
  • Function : Author
Patrick Ingraham
  • Function : Author
Paul Kalas
Quinn Konopacky
  • Function : Author
James E. Larkin
  • Function : Author
Jérôme Maire
  • Function : Author
Franck Marchis
Mark S. Marley
  • Function : Author
Christian Marois
Stanimir Metchev
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Maxwell A. Millar-Blanchaer
  • Function : Author
Katie M. Morzinski
  • Function : Author
Eric L. Nielsen
  • Function : Author
Andrew Norton
  • Function : Author
Rebecca Oppenheimer
  • Function : Author
David Palmer
  • Function : Author
Jennifer Patience
  • Function : Author
Marshall Perrin
Lisa Poyneer
  • Function : Author
Abhijith Rajan
  • Function : Author
Julien Rameau
  • Function : Author
Fredrik T. Rantakyrö
  • Function : Author
Naru Sadakuni
  • Function : Author
Leslie Saddlemyer
  • Function : Author
Dmitry Savransky
  • Function : Author
Adam C. Schneider
  • Function : Author
Andrew Serio
  • Function : Author
Anand Sivaramakrishnan
  • Function : Author
Inseok Song
  • Function : Author
Remi Soummer
  • Function : Author
Sandrine Thomas
  • Function : Author
J. Kent Wallace
  • Function : Author
Jason J. Wang
  • Function : Author
Kimberly Ward-Duong
  • Function : Author
Sloane Wiktorowicz
Schuyler Wolff

Abstract

Using the Gemini Planet Imager located at Gemini South, we measured the near-infrared (1.0-2.4 μm) spectrum of the planetary companion to the nearby, young star β Pictoris. We compare the spectrum obtained with currently published model grids and with known substellar objects and present the best matching models as well as the best matching observed objects. Comparing the empirical measurement of the bolometric luminosity to evolutionary models, we find a mass of 12.9 ± 0.2 {{ M }}{Jup}, an effective temperature of 1724 ± 15 K, a radius of 1.46 ± 0.01 {{ R }}{Jup}, and a surface gravity of {log}g=4.18+/- 0.01 [dex] (cgs). The stated uncertainties are statistical errors only, and do not incorporate any uncertainty on the evolutionary models. Using atmospheric models, we find an effective temperature of 1700-1800 K and a surface gravity of {log}g=3.5-4.0 [dex] depending upon the model. These values agree well with other publications and with “hot-start” predictions from planetary evolution models. Further, we find that the spectrum of β Pic b best matches a low surface gravity L2 ± 1 brown dwarf. Finally, comparing the spectrum to field brown dwarfs, we find the the spectrum best matches 2MASS J04062677-381210 and 2MASS J03552337+1133437.

Dates and versions

insu-03692525 , version 1 (09-06-2022)

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Cite

Jeffrey Chilcote, Laurent Pueyo, Robert J. de Rosa, Jeffrey Vargas, Bruce Macintosh, et al.. 1-2.4 μm Near-IR Spectrum of the Giant Planet β Pictoris b Obtained with the Gemini Planet Imager. The Astronomical Journal, 2017, 153, ⟨10.3847/1538-3881/aa63e9⟩. ⟨insu-03692525⟩
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