J/ApJ/683/1076 Transits of exoplanet XO-3b (Winn+, 2008)
The transit light curve project.
IX. Evidence for a smaller radius of the exoplanet XO-3b.
Winn J.N., Holman M.J., Torres G., McCullough P., Johns-Krull C.,
Latham D.W., Shporer A., Mazeh T., Garcia-Melendo E., Foote C.,
Esquerdo G., Everett M.
<Astrophys. J., 683, 1076-1084 (2008)>
=2008ApJ...683.1076W 2008ApJ...683.1076W
ADC_Keywords: Stars, variable ; Planets ; Photometry
Keywords: planetary systems - stars: individual (GSC 03727-01064, XO-3)
Abstract:
We present photometry of 13 transits of XO-3b, a massive transiting
planet on an eccentric orbit. Previous data led to two inconsistent
estimates of the planetary radius. Our data strongly favor the smaller
radius, with increased precision: Rp=1.217±0.073R☉. A
conflict remains between the mean stellar density determined from the
light curve, and the stellar surface gravity determined from the
shapes of spectral lines. We argue the light curve should take
precedence, and revise the system parameters accordingly. The
planetary radius is about 1σ larger than the theoretical radius
for a hydrogen-helium planet of the given mass and insolation. To help
in planning future observations, we provide refined transit and
occultation ephemerides.
Description:
We observed XO-3 on 12 nights when transits were predicted to occur.
Objects:
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RA (2000) DE Designation(s)
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04 21 52.7 +57 49 02 XO-3 = TYC 3727-1064-1
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See also:
J/ApJ/652/1715 : Four transits of the exoplanet XO-1b (Holman+, 2006)
J/AJ/133/11 : Photometry of OGLE-TR 111 (Winn+, 2007)
J/ApJ/657/1098 : Transit of TrES-1 (Winn+, 2007)
J/ApJ/655/1103 : Five transits of the exoplanet OGLE-TR-10b (Holman+, 2007)
J/AJ/133/1828 : Transit light curves of HD 189733 (Winn+, 2007)
J/ApJ/664/1185 : Three transits of the exoplanet TrES-2 (Holman+, 2007)
J/AJ/134/1707 : Six transit of exoplanet HAT-P-1b (Winn+, 2007)
J/AJ/136/267 : Six occultations of the exoplanet TrES-3 (Winn+, 2008)
J/ApJ/693/794 : Transit of exoplanet HD 17156b (Winn+, 2009)
J/AJ/137/3826 : Two transits of the giant planet WASP-4b (Winn+, 2009)
J/AJ/137/4911 : Six transits of the exoplanet XO-2b (Fernandez+, 2009)
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 28 6104 Photometry of XO-3
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 I1 --- Inst [1/4] Instrument code (1)
3- 7 A5 --- Filt [IRVz clear] Filter
9- 21 F13.5 d HJD Heliocentric Julian Date
23- 28 F6.4 --- Rflux Relative flux
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Note (1): Observatory Code as follows:
1 = Fred L. Whipple Observatory 1.2m telescope, Arizona
2 = Wise Observatory 0.5m telescope, Israel
3 = Vermillion Cliffs Observatory 0.4m telescope, Utah
4 = Esteve Duran Observatory 0.6m telescope, Seva, Spain.
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History:
From electronic version of the journal
References:
Holman et al., Paper I 2006ApJ...652.1715H 2006ApJ...652.1715H, Cat. J/ApJ/652/1715
Winn et al., Paper II 2007AJ....133...11W 2007AJ....133...11W, Cat. J/AJ/133/11
Winn et al., Paper III 2007ApJ...657.1098W 2007ApJ...657.1098W, Cat. J/ApJ/657/1098
Holman et al., Paper IV 2007ApJ...655.1103H 2007ApJ...655.1103H, Cat. J/ApJ/655/1103
Winn et al., Paper V 2007AJ....133.1828W 2007AJ....133.1828W, Cat. J/AJ/133/1828
Holman et al. Paper VI 2007ApJ...664.1185H 2007ApJ...664.1185H, Cat. J/ApJ/664/1185
Winn et al., Paper VII 2007AJ....134.1707W 2007AJ....134.1707W, Cat. J/AJ/134/1707
Winn et al., Paper VIII 2008AJ....136..267W 2008AJ....136..267W, Cat. J/AJ/136/267
Winn et al., Paper IX 2008ApJ...683.1076W 2008ApJ...683.1076W, Cat. J/ApJ/683/1076
Winn et al., Paper X 2009ApJ...693..794W 2009ApJ...693..794W, Cat. J/ApJ/693/794
Winn et al., Paper XI 2009AJ....137.3826W 2009AJ....137.3826W, Cat. J/AJ/137/3826
Fernandez et al., Paper XII 2009AJ....137.4911F 2009AJ....137.4911F, Cat. J/AJ/137/4911
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 08-Aug-2009