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, A. Pál

Research output: Contribution to journalArticle

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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 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.

Original languageEnglish
Pages (from-to)1715-1723
Number of pages9
JournalAstrophysical Journal
Volume652
Issue number2 I
DOIs
Publication statusPublished - Dec 1 2006

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extrasolar planets
transit
light curve
stellar mass
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planet
planets
estimates
photometry
time measurement
project

Keywords

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

ASJC Scopus subject areas

  • Space and Planetary Science
  • Nuclear and High Energy Physics

Cite this

Holman, M. J., Winn, J. N., Latham, D. W., O'Donovan, F. T., Charbonneau, D., Bakos, G. A., ... Pál, A. (2006). The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b. Astrophysical Journal, 652(2 I), 1715-1723. https://doi.org/10.1086/508155

The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b. / Holman, Matthew J.; Winn, Joshua N.; Latham, David W.; O'Donovan, Francis T.; Charbonneau, David; Bakos, Gáspár A.; Esquerdo, Gilbert A.; Hergenrother, Carl; Everett, Mark E.; Pál, A.

In: Astrophysical Journal, Vol. 652, No. 2 I, 01.12.2006, p. 1715-1723.

Research output: Contribution to journalArticle

Holman, MJ, Winn, JN, Latham, DW, O'Donovan, FT, Charbonneau, D, Bakos, GA, Esquerdo, GA, Hergenrother, C, Everett, ME & Pál, A 2006, 'The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b', Astrophysical Journal, vol. 652, no. 2 I, pp. 1715-1723. https://doi.org/10.1086/508155
Holman MJ, Winn JN, Latham DW, O'Donovan FT, Charbonneau D, Bakos GA et al. The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b. Astrophysical Journal. 2006 Dec 1;652(2 I):1715-1723. https://doi.org/10.1086/508155
Holman, Matthew J. ; Winn, Joshua N. ; Latham, David W. ; O'Donovan, Francis T. ; Charbonneau, David ; Bakos, Gáspár A. ; Esquerdo, Gilbert A. ; Hergenrother, Carl ; Everett, Mark E. ; Pál, A. / The transit light curve project. I. Four consecutive transits of the exoplanet XO-1b. In: Astrophysical Journal. 2006 ; Vol. 652, No. 2 I. pp. 1715-1723.
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