The first H-band spectrum of the giant planet β Pictoris b

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DOIResolve DOI: http://doi.org/10.1088/2041-8205/798/1/L3
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TypeArticle
Journal titleThe Astrophysical Journal Letters
ISSN2041-8205
Volume798
Issue1
Article numberL3
AbstractUsing the recently installed Gemini Planet Imager (GPI), we have obtained the first H-band spectrum of the planetary companion to the nearby young star β Pictoris. GPI is designed to image and provide low-resolution spectra of Jupiter-sized, self-luminous planetary companions around young nearby stars. These observations were taken covering the H band (1.65 μm). The spectrum has a resolving power of ∼45 and demonstrates the distinctive triangular shape of a cool substellar object with low surface gravity. Using atmospheric models, we find an effective temperature of 1600-1700K and a surface gravity of log(g) = 3.5-4.5 (cgs units). These values agree well with "hot-start" predictions from planetary evolution models for a gas giant with mass between 10 and 12 MJup and age between 10 and 20 Myr.
Publication date
PublisherIOP Sciences
LanguageEnglish
AffiliationNational Science Infrastructure; National Research Council Canada
Peer reviewedYes
NPARC number21275831
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Record identifier2f6f60aa-a1f1-46f0-8f48-89a99e4d53a4
Record created2015-07-14
Record modified2016-07-18
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