KEPLER-63b

A giant planet in a polar orbit around a young sun-like star

Roberto Sanchis-Ojeda, Joshua N. Winn, Geoffrey W. Marcy, Andrew W. Howard, Howard Isaacson, John Asher Johnson, Guillermo Torres, Simon Albrecht, Tiago L. Campante, William J. Chaplin, Guy R. Davies, Mikkel N. Lund, Joshua A. Carter, Rebekah Ilene Dawson, Lars A. Buchhave, Mark E. Everett, Debra A. Fischer, John C. Geary, Ronald Lynn Gilliland, Elliott P. Horch & 2 others Steve B. Howell, David W. Latham

Research output: Contribution to journalArticle

57 Citations (Scopus)

Abstract

We present the discovery and characterization of a giant planet orbiting the young Sun-like star Kepler-63 (KOI-63, M⊙Kp = 11.6, T eff = 5576 K, M⊙ = 0.98 M). The planet transits every 9.43 days, with apparent depth variations and brightening anomalies caused by large starspots. The planet's radius is 6.1 ± 0.2 R , based on the transit light curve and the estimated stellar parameters. The planet's mass could not be measured with the existing radial-velocity data, due to the high level of stellar activity, but if we assume a circular orbit, then we can place a rough upper bound of 120 M ⊕ (3σ). The host star has a high obliquity (ψ = 104°), based on the Rossiter-McLaughlin effect and an analysis of starspot-crossing events. This result is valuable because almost all previous obliquity measurements are for stars with more massive planets and shorter-period orbits. In addition, the polar orbit of the planet combined with an analysis of spot-crossing events reveals a large and persistent polar starspot. Such spots have previously been inferred using Doppler tomography, and predicted in simulations of magnetic activity of young Sun-like stars.

Original languageEnglish (US)
Article number54
JournalAstrophysical Journal
Volume775
Issue number1
DOIs
StatePublished - Sep 20 2013

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polar orbits
planets
sun
planet
starspots
stars
obliquity
transit
stellar activity
circular orbits
radial velocity
light curve
tomography
young
anomalies
orbits
anomaly
radii
simulation

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Sanchis-Ojeda, R., Winn, J. N., Marcy, G. W., Howard, A. W., Isaacson, H., Johnson, J. A., ... Latham, D. W. (2013). KEPLER-63b: A giant planet in a polar orbit around a young sun-like star. Astrophysical Journal, 775(1), [54]. https://doi.org/10.1088/0004-637X/775/1/54
Sanchis-Ojeda, Roberto ; Winn, Joshua N. ; Marcy, Geoffrey W. ; Howard, Andrew W. ; Isaacson, Howard ; Johnson, John Asher ; Torres, Guillermo ; Albrecht, Simon ; Campante, Tiago L. ; Chaplin, William J. ; Davies, Guy R. ; Lund, Mikkel N. ; Carter, Joshua A. ; Dawson, Rebekah Ilene ; Buchhave, Lars A. ; Everett, Mark E. ; Fischer, Debra A. ; Geary, John C. ; Gilliland, Ronald Lynn ; Horch, Elliott P. ; Howell, Steve B. ; Latham, David W. / KEPLER-63b : A giant planet in a polar orbit around a young sun-like star. In: Astrophysical Journal. 2013 ; Vol. 775, No. 1.
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abstract = "We present the discovery and characterization of a giant planet orbiting the young Sun-like star Kepler-63 (KOI-63, M⊙Kp = 11.6, T eff = 5576 K, M⊙ = 0.98 M⊙). The planet transits every 9.43 days, with apparent depth variations and brightening anomalies caused by large starspots. The planet's radius is 6.1 ± 0.2 R ⊕, based on the transit light curve and the estimated stellar parameters. The planet's mass could not be measured with the existing radial-velocity data, due to the high level of stellar activity, but if we assume a circular orbit, then we can place a rough upper bound of 120 M ⊙⊕ (3σ). The host star has a high obliquity (ψ = 104°), based on the Rossiter-McLaughlin effect and an analysis of starspot-crossing events. This result is valuable because almost all previous obliquity measurements are for stars with more massive planets and shorter-period orbits. In addition, the polar orbit of the planet combined with an analysis of spot-crossing events reveals a large and persistent polar starspot. Such spots have previously been inferred using Doppler tomography, and predicted in simulations of magnetic activity of young Sun-like stars.",
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Sanchis-Ojeda, R, Winn, JN, Marcy, GW, Howard, AW, Isaacson, H, Johnson, JA, Torres, G, Albrecht, S, Campante, TL, Chaplin, WJ, Davies, GR, Lund, MN, Carter, JA, Dawson, RI, Buchhave, LA, Everett, ME, Fischer, DA, Geary, JC, Gilliland, RL, Horch, EP, Howell, SB & Latham, DW 2013, 'KEPLER-63b: A giant planet in a polar orbit around a young sun-like star', Astrophysical Journal, vol. 775, no. 1, 54. https://doi.org/10.1088/0004-637X/775/1/54

KEPLER-63b : A giant planet in a polar orbit around a young sun-like star. / Sanchis-Ojeda, Roberto; Winn, Joshua N.; Marcy, Geoffrey W.; Howard, Andrew W.; Isaacson, Howard; Johnson, John Asher; Torres, Guillermo; Albrecht, Simon; Campante, Tiago L.; Chaplin, William J.; Davies, Guy R.; Lund, Mikkel N.; Carter, Joshua A.; Dawson, Rebekah Ilene; Buchhave, Lars A.; Everett, Mark E.; Fischer, Debra A.; Geary, John C.; Gilliland, Ronald Lynn; Horch, Elliott P.; Howell, Steve B.; Latham, David W.

In: Astrophysical Journal, Vol. 775, No. 1, 54, 20.09.2013.

Research output: Contribution to journalArticle

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T2 - A giant planet in a polar orbit around a young sun-like star

AU - Sanchis-Ojeda, Roberto

AU - Winn, Joshua N.

AU - Marcy, Geoffrey W.

AU - Howard, Andrew W.

AU - Isaacson, Howard

AU - Johnson, John Asher

AU - Torres, Guillermo

AU - Albrecht, Simon

AU - Campante, Tiago L.

AU - Chaplin, William J.

AU - Davies, Guy R.

AU - Lund, Mikkel N.

AU - Carter, Joshua A.

AU - Dawson, Rebekah Ilene

AU - Buchhave, Lars A.

AU - Everett, Mark E.

AU - Fischer, Debra A.

AU - Geary, John C.

AU - Gilliland, Ronald Lynn

AU - Horch, Elliott P.

AU - Howell, Steve B.

AU - Latham, David W.

PY - 2013/9/20

Y1 - 2013/9/20

N2 - We present the discovery and characterization of a giant planet orbiting the young Sun-like star Kepler-63 (KOI-63, M⊙Kp = 11.6, T eff = 5576 K, M⊙ = 0.98 M⊙). The planet transits every 9.43 days, with apparent depth variations and brightening anomalies caused by large starspots. The planet's radius is 6.1 ± 0.2 R ⊕, based on the transit light curve and the estimated stellar parameters. The planet's mass could not be measured with the existing radial-velocity data, due to the high level of stellar activity, but if we assume a circular orbit, then we can place a rough upper bound of 120 M ⊙⊕ (3σ). The host star has a high obliquity (ψ = 104°), based on the Rossiter-McLaughlin effect and an analysis of starspot-crossing events. This result is valuable because almost all previous obliquity measurements are for stars with more massive planets and shorter-period orbits. In addition, the polar orbit of the planet combined with an analysis of spot-crossing events reveals a large and persistent polar starspot. Such spots have previously been inferred using Doppler tomography, and predicted in simulations of magnetic activity of young Sun-like stars.

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Sanchis-Ojeda R, Winn JN, Marcy GW, Howard AW, Isaacson H, Johnson JA et al. KEPLER-63b: A giant planet in a polar orbit around a young sun-like star. Astrophysical Journal. 2013 Sep 20;775(1). 54. https://doi.org/10.1088/0004-637X/775/1/54