Skip to main content
Open Access Publications from the University of California

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

  • Author(s): Chilcote, J
  • Barman, T
  • Fitzgerald, MP
  • Graham, JR
  • Larkin, JE
  • Macintosh, B
  • Bauman, B
  • Burrows, AS
  • Cardwell, A
  • De Rosa, RJ
  • Dillon, D
  • Doyon, R
  • Dunn, J
  • Erikson, D
  • Gavel, D
  • Goodsell, SJ
  • Hartung, M
  • Hibon, P
  • Ingraham, P
  • Kalas, P
  • Konopacky, Q
  • Maire, J
  • Marchis, F
  • Marley, MS
  • Marois, C
  • Millar-Blanchaer, M
  • Morzinski, K
  • Norton, A
  • Oppenheimer, R
  • Palmer, D
  • Patience, J
  • Perrin, M
  • Poyneer, L
  • Pueyo, L
  • Rantakyrö, FT
  • Sadakuni, N
  • Saddlemyer, L
  • Savransky, D
  • Serio, A
  • Sivaramakrishnan, A
  • Song, I
  • Soummer, R
  • Thomas, S
  • Wallace, JK
  • Wiktorowicz, S
  • Wolff, S
  • et al.

© 2015. The American Astronomical Society. All rights reserved. Using 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 MJupand age between 10 and 20 Myr.

Many UC-authored scholarly publications are freely available on this site because of the UC Academic Senate's Open Access Policy. Let us know how this access is important for you.

Main Content
Current View