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

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

doi:10.3847/1538-3881/aa63e9

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

Chilcote, Jeffrey; Pueyo, Laurent; De Rosa, Robert J.; Vargas, Jeffrey; Macintosh, Bruce; Bailey, Vanessa P.; Barman, Travis; Bauman, Brian; Bruzzone, Sebastian; Bulger, Joanna; Burrows, Adam S.; Cardwell, Andrew; Chen, Christine H.; Cotten, Tara; Dillon, Daren; Doyon, Rene; Draper, Zachary H.; Duchêne, Gaspard; Dunn, Jennifer; Erikson, Darren; Fitzgerald, Michael P.; Follette, Katherine B.; Gavel, Donald; Goodsell, Stephen J.; Graham, James R.; Greenbaum, Alexandra Z.; Hartung, Markus; Hibon, Pascale; Hung, Li-Wei; Ingraham, Patrick; Kalas, Paul; Konopacky, Quinn; Larkin, James E.; Maire, Jérôme; Marchis, Franck; Marley, Mark S.; Marois, Christian; Metchev, Stanimir; Millar-Blanchaer, Maxwell A.; Morzinski, Katie M.; Nielsen, Eric L.; Norton, Andrew; Oppenheimer, Rebecca; Palmer, David; Patience, Jennifer; Perrin, Marshall; Poyneer, Lisa; Rajan, Abhijith; Rameau, Julien; Rantakyrö, Fredrik T.; Sadakuni, Naru; Saddlemyer, Leslie; Savransky, Dmitry; Schneider, Adam C.; Serio, Andrew; Si...

Authors

Jeffrey Chilcote

Laurent Pueyo

Robert J. De Rosa

Jeffrey Vargas

Bruce Macintosh

Vanessa P. Bailey

Travis Barman

Brian Bauman

Sebastian Bruzzone

Joanna Bulger

Adam S. Burrows

Andrew Cardwell

Christine H. Chen

Tara Cotten

Daren Dillon

Rene Doyon

Zachary H. Draper

Gaspard Duchêne

Jennifer Dunn

Darren Erikson

Michael P. Fitzgerald

Katherine B. Follette

Donald Gavel

Dr Stephen Goodsell stephen.goodsell@durham.ac.uk
Programme Manager

James R. Graham

Alexandra Z. Greenbaum

Markus Hartung

Pascale Hibon

Li-Wei Hung

Patrick Ingraham

Paul Kalas

Quinn Konopacky

James E. Larkin

Jérôme Maire

Franck Marchis

Mark S. Marley

Christian Marois

Stanimir Metchev

Maxwell A. Millar-Blanchaer

Katie M. Morzinski

Eric L. Nielsen

Andrew Norton

Rebecca Oppenheimer

David Palmer

Jennifer Patience

Marshall Perrin

Lisa Poyneer

Abhijith Rajan

Julien Rameau

Fredrik T. Rantakyrö

Naru Sadakuni

Leslie Saddlemyer

Dmitry Savransky

Adam C. Schneider

Andrew Serio

Anand Sivaramakrishnan

Inseok Song

Remi Soummer

Sandrine Thomas

J. Kent Wallace

Jason J. Wang

Kimberly Ward-Duong

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 ${{ \mathcal M }}_{\mathrm{Jup}}$, an effective temperature of 1724 ± 15 K, a radius of 1.46 ± 0.01 ${{ \mathcal R }}_{\mathrm{Jup}}$, and a surface gravity of $\mathrm{log}g=4.18\pm 0.01$ [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 $\mathrm{log}g=3.5$–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.

Citation

Chilcote, J., Pueyo, L., De Rosa, R. J., Vargas, J., Macintosh, B., Bailey, V. P., …Wolff, S. (2017). 1–2.4 μm Near-IR Spectrum of the Giant Planet β Pictoris b Obtained with the Gemini Planet Imager. Astrophysical Journal, 153(4), Article 182. https://doi.org/10.3847/1538-3881/aa63e9

Journal Article Type	Article
Acceptance Date	Feb 27, 2017
Online Publication Date	Mar 28, 2017
Publication Date	Mar 28, 2017
Deposit Date	Jul 11, 2017
Publicly Available Date	Jul 11, 2017
Journal	Astronomical Journal
Print ISSN	0004-637X
Electronic ISSN	1538-4357
Publisher	American Astronomical Society
Peer Reviewed	Peer Reviewed
Volume	153
Issue	4
Article Number	182
DOI	https://doi.org/10.3847/1538-3881/aa63e9