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 I. Dawson; Lars A. Buchhave; Mark E. Everett; Debra A. 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, 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 I. Dawson, Lars A. Buchhave, Mark E. Everett, Debra A. Fischer, John C. Geary, Ronald L. Gilliland, Elliott P. HorchSteve B. Howell, David W. Latham

Physics and Astronomy

Research output: Contribution to journal › Article › peer-review

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

Keywords

planetary systems
stars: activity
stars: individual (Kepler-63)
stars: rotation
starspots

ASJC Scopus subject areas

Space and Planetary Science
Astronomy and Astrophysics

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

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Sanchis-Ojeda, R., Winn, J. N., Marcy, G. W., Howard, A. W., Isaacson, H., Johnson, J. A., Torres, G., Albrecht, 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. A., 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), Article 54. https://doi.org/10.1088/0004-637X/775/1/54

@article{68eb904b4a974729b5ae3da7fdea9516,

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.",

keywords = "planetary systems, stars: activity, stars: individual (Kepler-63), stars: rotation, starspots",

author = "Roberto Sanchis-Ojeda and Winn, {Joshua N.} and Marcy, {Geoffrey W.} and Howard, {Andrew W.} and Howard Isaacson and Johnson, {John Asher} and Guillermo Torres and Simon Albrecht 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 Fischer, {Debra A.} and Geary, {John C.} and Gilliland, {Ronald L.} and Horch, {Elliott P.} and Howell, {Steve B.} and Latham, {David W.}",

year = "2013",

month = sep,

day = "20",

doi = "10.1088/0004-637X/775/1/54",

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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', The Astrophysical Journal, vol. 775, no. 1, 54. https://doi.org/10.1088/0004-637X/775/1/54

TY - JOUR

T1 - KEPLER-63b

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 I.

AU - Buchhave, Lars A.

AU - Everett, Mark E.

AU - Fischer, Debra A.

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.

KW - planetary systems

KW - stars: activity

KW - stars: individual (Kepler-63)

KW - stars: rotation

KW - starspots

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

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SN - 0004-637X

VL - 775

JO - The Astrophysical Journal

JF - The Astrophysical Journal

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ER -

KEPLER-63b: A giant planet in a polar orbit around a young sun-like star

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