Kepler-63b: a giant planet in a polar orbit around a young Sun-like star

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

doi:10.1088/0004-637X/775/1/54

Kepler-63b: a giant planet in a polar orbit around a young Sun-like star

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

Astrophysics and Planetary Science

72 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 language	English
Article number	UNSP 54
Journal	The Astrophysical Journal
Volume	775
Issue number	1
ISSN	0004-637X
DOIs	https://doi.org/10.1088/0004-637X/775/1/54
Publication status	Published - 20 Sept 2013

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Sanchis-Ojeda, R., Winn, J. N., Marcy, G. W., Howard, A. W., Isaacson, H., Johnson, J. A., Torres, G., Albercht, S., Campante, T. L., Chaplin, W. J., Davies, G. R., Lund, M. N., Carter, J. A., Dawson, R. I., Buchhave, L. A., Everett, M. E., Fischer, D., Geary, J. C., Gilliland, R. L., ... Latham, D. W. (2013). Kepler-63b: a giant planet in a polar orbit around a young Sun-like star. The Astrophysical Journal, 775(1), [UNSP 54]. https://doi.org/10.1088/0004-637X/775/1/54

Sanchis-Ojeda, R, Winn, JN, Marcy, GW, Howard, AW, Isaacson, H, Johnson, JA, Torres, G, Albercht, S, Campante, TL, Chaplin, WJ, Davies, GR, Lund, MN, Carter, JA, Dawson, RI, Buchhave, LA, Everett, ME, Fischer, D, 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', The Astrophysical Journal, vol. 775, no. 1, UNSP 54. https://doi.org/10.1088/0004-637X/775/1/54

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title = "Kepler-63b: a giant planet in a polar orbit around a young Sun-like star",

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.",

author = "Roberto Sanchis-Ojeda and Winn, {Joahua N.} and Marcy, {Geoffrey W.} and Howard, {Andrew W.} and Howard Isaacson and Johnson, {John Asher} and Guillermo Torres and Simon Albercht and Campante, {Tiago L.} and Chaplin, {William J.} and Davies, {Guy R.} and Lund, {Mikkel N.} and Carter, {Joshua A.} and Dawson, {Rebekah I.} and Buchhave, {Lars A.} and Everett, {Mark E.} and Debra Fischer and Geary, {John C.} and Gilliland, {Ronald L.} and Horch, {Elliott P.} and Howell, {Steve B.} and Latham, {David W.}",

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

AU - Sanchis-Ojeda, Roberto

AU - Winn, Joahua N.

AU - Marcy, Geoffrey W.

AU - Howard, Andrew W.

AU - Isaacson, Howard

AU - Johnson, John Asher

AU - Torres, Guillermo

AU - Albercht, Simon

AU - Campante, Tiago L.

AU - Chaplin, William J.

AU - Davies, Guy R.

AU - Lund, Mikkel N.

AU - Carter, Joshua A.

AU - Dawson, Rebekah I.

AU - Buchhave, Lars A.

AU - Everett, Mark E.

AU - Fischer, Debra

AU - Geary, John C.

AU - Gilliland, Ronald L.

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.

AB - 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.

U2 - 10.1088/0004-637X/775/1/54

DO - 10.1088/0004-637X/775/1/54

M3 - Journal article

SN - 0004-637X

VL - 775

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

M1 - UNSP 54

ER -

Kepler-63b: a giant planet in a polar orbit around a young Sun-like star

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