The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b

Matthew J. Holman; Joshua N. Winn; David W. Latham; Francis T. O'Donovan; David Charbonneau; Gáspár A. Bakos; Gilbert A. Esquerdo; Carl Hergenrother; Mark E. Everett; P. Á L. András

doi:10.1086/508155

The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b

Matthew J. Holman, Joshua N. Winn, David W. Latham, Francis T. O'Donovan, David Charbonneau, Gáspár A. Bakos, Gilbert A. Esquerdo, Carl Hergenrother, Mark E. Everett, P. Á L. András

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Abstract

We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve on the estimates of the transit parameters, finding the planetary radius to be R_P = 1.184 _-0.018^+0.028 R_J, and the stellar radius to be R* = 0.928_-0.013^+0.018 R_⊙, assuming a stellar mass of M* = (1.00 ± 0.03) M⊙. The uncertainties in the planetary and stellar radii are dominated by the uncertainty in the stellar mass. These uncertainties increase by a factor of 2-3 if a more conservative uncertainty of 0.10 M_⊙ is assumed for the stellar mass. Our estimate of the planetary radius is smaller than that reported by McCullough and coworkers, and the resulting estimate for the mean density of XO-1b is intermediate between that of the low-density planet HD 209458b and the higher density planets TrES-1 and HD 189733b. The timings of the transits have an accuracy ranging from 0.2 to 2.5 minutes and are marginally consistent with a uniform period.

Original language	English (US)
Pages (from-to)	1715-1723
Number of pages	9
Journal	Astrophysical Journal
Volume	652
Issue number	2 I
DOIs	https://doi.org/10.1086/508155
State	Published - Dec 1 2006
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Stars: individual (GSC 02041-01657)
Techniques: photometric

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10.1086/508155

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title = "The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b",

abstract = "We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve on the estimates of the transit parameters, finding the planetary radius to be RP = 1.184 -0.018+0.028 RJ, and the stellar radius to be R* = 0.928-0.013+0.018 R⊙, assuming a stellar mass of M* = (1.00 ± 0.03) M⊙. The uncertainties in the planetary and stellar radii are dominated by the uncertainty in the stellar mass. These uncertainties increase by a factor of 2-3 if a more conservative uncertainty of 0.10 M⊙ is assumed for the stellar mass. Our estimate of the planetary radius is smaller than that reported by McCullough and coworkers, and the resulting estimate for the mean density of XO-1b is intermediate between that of the low-density planet HD 209458b and the higher density planets TrES-1 and HD 189733b. The timings of the transits have an accuracy ranging from 0.2 to 2.5 minutes and are marginally consistent with a uniform period.",

keywords = "Planetary systems, Stars: individual (GSC 02041-01657), Techniques: photometric",

author = "Holman, {Matthew J.} and Winn, {Joshua N.} and Latham, {David W.} and O'Donovan, {Francis T.} and David Charbonneau and Bakos, {G{\'a}sp{\'a}r A.} and Esquerdo, {Gilbert A.} and Carl Hergenrother and Everett, {Mark E.} and Andr{\'a}s, {P. {\'A} L.}",

year = "2006",

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doi = "10.1086/508155",

language = "English (US)",

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TY - JOUR

T1 - The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b

AU - Holman, Matthew J.

AU - Winn, Joshua N.

AU - Latham, David W.

AU - O'Donovan, Francis T.

AU - Charbonneau, David

AU - Bakos, Gáspár A.

AU - Esquerdo, Gilbert A.

AU - Hergenrother, Carl

AU - Everett, Mark E.

AU - András, P. Á L.

PY - 2006/12/1

Y1 - 2006/12/1

N2 - We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve on the estimates of the transit parameters, finding the planetary radius to be RP = 1.184 -0.018+0.028 RJ, and the stellar radius to be R* = 0.928-0.013+0.018 R⊙, assuming a stellar mass of M* = (1.00 ± 0.03) M⊙. The uncertainties in the planetary and stellar radii are dominated by the uncertainty in the stellar mass. These uncertainties increase by a factor of 2-3 if a more conservative uncertainty of 0.10 M⊙ is assumed for the stellar mass. Our estimate of the planetary radius is smaller than that reported by McCullough and coworkers, and the resulting estimate for the mean density of XO-1b is intermediate between that of the low-density planet HD 209458b and the higher density planets TrES-1 and HD 189733b. The timings of the transits have an accuracy ranging from 0.2 to 2.5 minutes and are marginally consistent with a uniform period.

AB - We present RIz photometry of four consecutive transits of the newly discovered exoplanet XO-1b. We improve on the estimates of the transit parameters, finding the planetary radius to be RP = 1.184 -0.018+0.028 RJ, and the stellar radius to be R* = 0.928-0.013+0.018 R⊙, assuming a stellar mass of M* = (1.00 ± 0.03) M⊙. The uncertainties in the planetary and stellar radii are dominated by the uncertainty in the stellar mass. These uncertainties increase by a factor of 2-3 if a more conservative uncertainty of 0.10 M⊙ is assumed for the stellar mass. Our estimate of the planetary radius is smaller than that reported by McCullough and coworkers, and the resulting estimate for the mean density of XO-1b is intermediate between that of the low-density planet HD 209458b and the higher density planets TrES-1 and HD 189733b. The timings of the transits have an accuracy ranging from 0.2 to 2.5 minutes and are marginally consistent with a uniform period.

KW - Planetary systems

KW - Stars: individual (GSC 02041-01657)

KW - Techniques: photometric

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JF - Astrophysical Journal

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ER -

The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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