Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star

M. Gillon; D.~R. Anderson; A.~H.~M.~J. Triaud; C. Hellier; P.~F.~L. Maxted; D. Pollaco; D. Queloz; B. Smalley; R.~G. West; D.~M. Wilson; S.~J. Bentley; A. Collier Cameron; B. Enoch; L. Hebb; K. Horne; J. Irwin; Y.~C. Joshi; T.~A. Lister; M. Mayor; F. Pepe; N. Parley; D. Segransan; S. Udry; P.~J. Wheatley

doi:10.1051/0004-6361/200911749

Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star

M. Gillon, D.~R. Anderson, A.~H.~M.~J. Triaud, C. Hellier, P.~F.~L. Maxted, D. Pollaco, D. Queloz, B. Smalley, R.~G. West, D.~M. Wilson, S.~J. Bentley, A. Collier Cameron, B. Enoch, L. Hebb, K. Horne, J. Irwin, Y.~C. Joshi, T.~A. Lister, M. Mayor, F. PepeN. Parley, D. Segransan, S. Udry, P.~J. Wheatley

Physics and Astronomy

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Abstract

We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060$^+ 0.0000022 $$_- 0.0000035 $ days a mildly metal-poor solar-type star of magnitude V = 11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass M$_p$ = 0.503$^+0.019$$_-0.038$ M$_J$ and radius R$_p$ = 1.224$^+0.051$$_-0.052$ RJ, resulting in a density $$_p$ = 0.27 plusmn 0.05 $J. The mass and radius for the host star are Mast = 0.88$^+0.05$$_-0.08$ Msun and Rast = 0.870$^+0.025$$_-0.036$ Rsun. The non-zero orbital eccentricity e = 0.054+0.018$_-0.015$ that we measure suggests that the planet underwent a massive tidal heating 1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis $ = 11$^+14$$_-18$ deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk. Based on data collected with the HARPS spectrograph at ESO La Silla Observatory in the programs 082.C-0040(E) and 082.C-0608. The photometric time-series and radial velocities (Tables 4, 5) used in this work are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/501/785

Original language	English
Pages (from-to)	785-792
Number of pages	8
Journal	Astronomy and Astrophysics
Volume	501
DOIs	https://doi.org/10.1051/0004-6361/200911749
Publication status	Published - 1 Jul 2009

Keywords

binaries: eclipsing, stars: individual: WASP-6, planetary systems, techniques: photometric, techniques: radial velocities, techniques: spectroscopic

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10.1051/0004-6361/200911749

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Gillon, M., Anderson, D. R., Triaud, A. H. M. J., Hellier, C., Maxted, P. F. L., Pollaco, D., Queloz, D., Smalley, B., West, R. G., Wilson, D. M., Bentley, S. J., Collier Cameron, A., Enoch, B., Hebb, L., Horne, K., Irwin, J., Joshi, Y. C., Lister, T. A., Mayor, M., ... Wheatley, P. J. (2009). Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star. Astronomy and Astrophysics, 501, 785-792. https://doi.org/10.1051/0004-6361/200911749

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title = "Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star",

abstract = "We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060$^+ 0.0000022 $$_- 0.0000035 $ days a mildly metal-poor solar-type star of magnitude V = 11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass M$_p$ = 0.503$^+0.019$$_-0.038$ M$_J$ and radius R$_p$ = 1.224$^+0.051$$_-0.052$ RJ, resulting in a density $$_p$ = 0.27 plusmn 0.05 $J. The mass and radius for the host star are Mast = 0.88$^+0.05$$_-0.08$ Msun and Rast = 0.870$^+0.025$$_-0.036$ Rsun. The non-zero orbital eccentricity e = 0.054+0.018$_-0.015$ that we measure suggests that the planet underwent a massive tidal heating 1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis $ = 11$^+14$$_-18$ deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk. Based on data collected with the HARPS spectrograph at ESO La Silla Observatory in the programs 082.C-0040(E) and 082.C-0608. The photometric time-series and radial velocities (Tables 4, 5) used in this work are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/501/785 ",

keywords = "binaries: eclipsing, stars: individual: WASP-6, planetary systems, techniques: photometric, techniques: radial velocities, techniques: spectroscopic",

author = "M. Gillon and D.~R. Anderson and A.~H.~M.~J. Triaud and C. Hellier and P.~F.~L. Maxted and D. Pollaco and D. Queloz and B. Smalley and R.~G. West and D.~M. Wilson and S.~J. Bentley and {Collier Cameron}, A. and B. Enoch and L. Hebb and K. Horne and J. Irwin and Y.~C. Joshi and T.~A. Lister and M. Mayor and F. Pepe and N. Parley and D. Segransan and S. Udry and P.~J. Wheatley",

year = "2009",

month = jul,

day = "1",

doi = "10.1051/0004-6361/200911749",

language = "English",

volume = "501",

pages = "785--792",

journal = "Astronomy and Astrophysics",

issn = "0004-6361",

publisher = "EDP Sciences",

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Gillon, M, Anderson, DR, Triaud, AHMJ, Hellier, C, Maxted, PFL, Pollaco, D, Queloz, D, Smalley, B, West, RG, Wilson, DM, Bentley, SJ, Collier Cameron, A, Enoch, B, Hebb, L, Horne, K, Irwin, J, Joshi, YC, Lister, TA, Mayor, M, Pepe, F, Parley, N, Segransan, D, Udry, S & Wheatley, PJ 2009, 'Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star', Astronomy and Astrophysics, vol. 501, pp. 785-792. https://doi.org/10.1051/0004-6361/200911749

TY - JOUR

T1 - Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star

AU - Gillon, M.

AU - Anderson, D.~R.

AU - Triaud, A.~H.~M.~J.

AU - Hellier, C.

AU - Maxted, P.~F.~L.

AU - Pollaco, D.

AU - Queloz, D.

AU - Smalley, B.

AU - West, R.~G.

AU - Wilson, D.~M.

AU - Bentley, S.~J.

AU - Collier Cameron, A.

AU - Enoch, B.

AU - Hebb, L.

AU - Horne, K.

AU - Irwin, J.

AU - Joshi, Y.~C.

AU - Lister, T.~A.

AU - Mayor, M.

AU - Pepe, F.

AU - Parley, N.

AU - Segransan, D.

AU - Udry, S.

AU - Wheatley, P.~J.

PY - 2009/7/1

Y1 - 2009/7/1

N2 - We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060$^+ 0.0000022 $$_- 0.0000035 $ days a mildly metal-poor solar-type star of magnitude V = 11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass M$_p$ = 0.503$^+0.019$$_-0.038$ M$_J$ and radius R$_p$ = 1.224$^+0.051$$_-0.052$ RJ, resulting in a density $$_p$ = 0.27 plusmn 0.05 $J. The mass and radius for the host star are Mast = 0.88$^+0.05$$_-0.08$ Msun and Rast = 0.870$^+0.025$$_-0.036$ Rsun. The non-zero orbital eccentricity e = 0.054+0.018$_-0.015$ that we measure suggests that the planet underwent a massive tidal heating 1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis $ = 11$^+14$$_-18$ deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk. Based on data collected with the HARPS spectrograph at ESO La Silla Observatory in the programs 082.C-0040(E) and 082.C-0608. The photometric time-series and radial velocities (Tables 4, 5) used in this work are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/501/785

AB - We report the discovery of WASP-6b, an inflated sub-Jupiter mass planet transiting every 3.3610060$^+ 0.0000022 $$_- 0.0000035 $ days a mildly metal-poor solar-type star of magnitude V = 11.9. A combined analysis of the WASP photometry, high-precision followup transit photometry and radial velocities yield a planetary mass M$_p$ = 0.503$^+0.019$$_-0.038$ M$_J$ and radius R$_p$ = 1.224$^+0.051$$_-0.052$ RJ, resulting in a density $$_p$ = 0.27 plusmn 0.05 $J. The mass and radius for the host star are Mast = 0.88$^+0.05$$_-0.08$ Msun and Rast = 0.870$^+0.025$$_-0.036$ Rsun. The non-zero orbital eccentricity e = 0.054+0.018$_-0.015$ that we measure suggests that the planet underwent a massive tidal heating 1 Gyr ago that could have contributed to its inflated radius. High-precision radial velocities obtained during a transit allow us to measure a sky-projected angle between the stellar spin and orbital axis $ = 11$^+14$$_-18$ deg. In addition to similar published measurements, this result favors a dominant migration mechanism based on tidal interactions with a protoplanetary disk. Based on data collected with the HARPS spectrograph at ESO La Silla Observatory in the programs 082.C-0040(E) and 082.C-0608. The photometric time-series and radial velocities (Tables 4, 5) used in this work are only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/501/785

KW - binaries: eclipsing, stars: individual: WASP-6, planetary systems, techniques: photometric, techniques: radial velocities, techniques: spectroscopic

U2 - 10.1051/0004-6361/200911749

DO - 10.1051/0004-6361/200911749

M3 - Article

SN - 0004-6361

VL - 501

SP - 785

EP - 792

JO - Astronomy and Astrophysics

JF - Astronomy and Astrophysics

ER -

Discovery and characterization of WASP-6b, an inflated sub-Jupiter mass planet transiting a solar-type star

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