TY - JOUR
T1 - The spin-orbit angle of the transiting hot Jupiter CoRoT-1b
AU - Pont, F.
AU - Endl, M.
AU - Cochran, W. D.
AU - Barnes, S. I.
AU - Sneden, C.
AU - MacQueen, P. J.
AU - Moutou, C.
AU - Aigrain, S.
AU - Alonso, R.
AU - Baglin, A.
AU - Bouchy, F.
AU - Deleuil, M.
AU - Fridlund, M.
AU - Hébrard, G.
AU - Hatzes, A.
AU - Mazeh, T.
AU - Shporer, A.
PY - 2010/2
Y1 - 2010/2
N2 - We measure the angle between the planetary orbit and the stellar rotation axis in the transiting planetary system CoRoT-1, with new HIRES/Keck and FORS/VLT high-accuracy photometry. The data indicate a highly tilted system, with a projected spin-orbit angle λ = 77° ± 11°. Systematic uncertainties in the radial velocity data could cause the actual errors to be larger by an unknown amount, and this result needs to be confirmed with further high-accuracy spectroscopic transit measurements. Spin-orbit alignment has now been measured in a dozen extra-solar planetary systems, and several show strong misalignment. The first three misaligned planets were all much more massive than Jupiter and followed eccentric orbits. CoRoT-1, however, is a jovian-mass close-in planet on a circular orbit. If its strong misalignment is confirmed, it would break this pattern. The high occurrence of misaligned systems for several types of planets and orbits favours planet-planet scattering as a mechanism to bring gas giants on very close orbits.
AB - We measure the angle between the planetary orbit and the stellar rotation axis in the transiting planetary system CoRoT-1, with new HIRES/Keck and FORS/VLT high-accuracy photometry. The data indicate a highly tilted system, with a projected spin-orbit angle λ = 77° ± 11°. Systematic uncertainties in the radial velocity data could cause the actual errors to be larger by an unknown amount, and this result needs to be confirmed with further high-accuracy spectroscopic transit measurements. Spin-orbit alignment has now been measured in a dozen extra-solar planetary systems, and several show strong misalignment. The first three misaligned planets were all much more massive than Jupiter and followed eccentric orbits. CoRoT-1, however, is a jovian-mass close-in planet on a circular orbit. If its strong misalignment is confirmed, it would break this pattern. The high occurrence of misaligned systems for several types of planets and orbits favours planet-planet scattering as a mechanism to bring gas giants on very close orbits.
KW - Planetary systems
KW - Stars: individual: CoRoT-Exo-1, CoRoT-1
KW - Techniques: photometric
KW - Techniques: radial velocities
UR - http://www.scopus.com/inward/record.url?scp=77954867990&partnerID=8YFLogxK
U2 - 10.1111/j.1745-3933.2009.00785.x
DO - 10.1111/j.1745-3933.2009.00785.x
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AN - SCOPUS:77954867990
SN - 1745-3933
VL - 402
SP - L1-L5
JO - Monthly Notices of the Royal Astronomical Society: Letters
JF - Monthly Notices of the Royal Astronomical Society: Letters
IS - 1
ER -