Refined parameters of the planet orbiting HD 189733

G. Á Bakos; H. Knutson; F. Pont; C. Moutou; D. Charbonneau; A. Shporer; F. Bouchy; M. Everett; C. Hergenrother; D. W. Latham; M. Mayor; T. Mazeh; R. W. Noyes; D. Queloz; A. Pál; S. Udry

doi:10.1086/506316

Refined parameters of the planet orbiting HD 189733

G. Á Bakos, H. Knutson, F. Pont, C. Moutou, D. Charbonneau, A. Shporer, F. Bouchy, M. Everett, C. Hergenrother, D. W. Latham, M. Mayor, T. Mazeh, R. W. Noyes, D. Queloz, A. Pál, S. Udry

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Abstract

We report on the BVRI multiband follow-up photometry of the transiting extrasolar planet HD 189733b. We revise the transit parameters and find a planetary radius of R_P = 1.154 ± 0.033R_J and an inclination of i_P = 85°.79 ± 0°.24. The new density (∼1 g cm^-3) is significantly higher than the former estimate (∼0.75 g cm^-3); this shows that from the current sample of nine transiting planets, only HD 209458 (and possibly OGLE-10b) have anomalously large radii and low densities. We note that due to the proximity of its parent star, HD 189733b currently has one of the most precise radius determinations among extrasolar planets. We calculate new ephemerides, P = 2.218573 ± 0.000020 days and T₀ = 2453629.39420 ±0.00024 (HJD), and estimate the timing offsets of the 11 distinct transits with respect to the predictions of a constant orbital period, which can be used to reveal the presence of additional planets in the system.

Original language	English (US)
Pages (from-to)	1160-1171
Number of pages	12
Journal	Astrophysical Journal
Volume	650
Issue number	2 I
DOIs	https://doi.org/10.1086/506316
State	Published - Oct 20 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Stars: Individual (HD 189733)

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10.1086/506316

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title = "Refined parameters of the planet orbiting HD 189733",

abstract = "We report on the BVRI multiband follow-up photometry of the transiting extrasolar planet HD 189733b. We revise the transit parameters and find a planetary radius of RP = 1.154 ± 0.033RJ and an inclination of iP = 85°.79 ± 0°.24. The new density (∼1 g cm-3) is significantly higher than the former estimate (∼0.75 g cm-3); this shows that from the current sample of nine transiting planets, only HD 209458 (and possibly OGLE-10b) have anomalously large radii and low densities. We note that due to the proximity of its parent star, HD 189733b currently has one of the most precise radius determinations among extrasolar planets. We calculate new ephemerides, P = 2.218573 ± 0.000020 days and T0 = 2453629.39420 ±0.00024 (HJD), and estimate the timing offsets of the 11 distinct transits with respect to the predictions of a constant orbital period, which can be used to reveal the presence of additional planets in the system.",

keywords = "Planetary systems, Stars: Individual (HD 189733)",

author = "Bakos, {G. {\'A}} and H. Knutson and F. Pont and C. Moutou and D. Charbonneau and A. Shporer and F. Bouchy and M. Everett and C. Hergenrother and Latham, {D. W.} and M. Mayor and T. Mazeh and Noyes, {R. W.} and D. Queloz and A. P{\'a}l and S. Udry",

year = "2006",

month = oct,

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doi = "10.1086/506316",

language = "English (US)",

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TY - JOUR

T1 - Refined parameters of the planet orbiting HD 189733

AU - Bakos, G. Á

AU - Knutson, H.

AU - Pont, F.

AU - Moutou, C.

AU - Charbonneau, D.

AU - Shporer, A.

AU - Bouchy, F.

AU - Everett, M.

AU - Hergenrother, C.

AU - Latham, D. W.

AU - Mayor, M.

AU - Mazeh, T.

AU - Noyes, R. W.

AU - Queloz, D.

AU - Pál, A.

AU - Udry, S.

PY - 2006/10/20

Y1 - 2006/10/20

N2 - We report on the BVRI multiband follow-up photometry of the transiting extrasolar planet HD 189733b. We revise the transit parameters and find a planetary radius of RP = 1.154 ± 0.033RJ and an inclination of iP = 85°.79 ± 0°.24. The new density (∼1 g cm-3) is significantly higher than the former estimate (∼0.75 g cm-3); this shows that from the current sample of nine transiting planets, only HD 209458 (and possibly OGLE-10b) have anomalously large radii and low densities. We note that due to the proximity of its parent star, HD 189733b currently has one of the most precise radius determinations among extrasolar planets. We calculate new ephemerides, P = 2.218573 ± 0.000020 days and T0 = 2453629.39420 ±0.00024 (HJD), and estimate the timing offsets of the 11 distinct transits with respect to the predictions of a constant orbital period, which can be used to reveal the presence of additional planets in the system.

AB - We report on the BVRI multiband follow-up photometry of the transiting extrasolar planet HD 189733b. We revise the transit parameters and find a planetary radius of RP = 1.154 ± 0.033RJ and an inclination of iP = 85°.79 ± 0°.24. The new density (∼1 g cm-3) is significantly higher than the former estimate (∼0.75 g cm-3); this shows that from the current sample of nine transiting planets, only HD 209458 (and possibly OGLE-10b) have anomalously large radii and low densities. We note that due to the proximity of its parent star, HD 189733b currently has one of the most precise radius determinations among extrasolar planets. We calculate new ephemerides, P = 2.218573 ± 0.000020 days and T0 = 2453629.39420 ±0.00024 (HJD), and estimate the timing offsets of the 11 distinct transits with respect to the predictions of a constant orbital period, which can be used to reveal the presence of additional planets in the system.

KW - Planetary systems

KW - Stars: Individual (HD 189733)

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JO - Astrophysical Journal

JF - Astrophysical Journal

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ER -

Refined parameters of the planet orbiting HD 189733

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