The transit light curve project. XII. Six transits of the exoplanet XO-2b

Jose M. Fernandez; Matthew J. Holman; Joshua N. Winn; Guillermo Torres; Avi Shporer; Tsevi Mazeh; Gilbert A. Esquerdo; Mark E. Everett

doi:10.1088/0004-6256/137/6/4911

The transit light curve project. XII. Six transits of the exoplanet XO-2b

Jose M. Fernandez, Matthew J. Holman, Joshua N. Winn, Guillermo Torres, Avi Shporer, Tsevi Mazeh, Gilbert A. Esquerdo, Mark E. Everett

Research output: Contribution to journal › Article › peer-review

28 Scopus citations

Abstract

We present photometry of six transits of the exoplanet XO-2b. By combining the light-curve analysis with theoretical isochrones to determine the stellar properties, we find the planetary radius to be 0.996_-0.018 ^+0.031 R_Jup and the planetary mass to be 0.565 ± 0.054 M_Jup. These results are consistent with those reported previously, and are also consistent with theoretical models for gas giant planets. The midtransit times are accurate to within 1 minute and are consistent with a constant period. However, the period we derive differs by 2.5σ from the previously published period. More data are needed to tell whether the period is actually variable (as it would be in the presence of an additional body) or if the timing errors have been underestimated.

Original language	English (US)
Pages (from-to)	4911-4916
Number of pages	6
Journal	Astronomical Journal
Volume	137
Issue number	6
DOIs	https://doi.org/10.1088/0004-6256/137/6/4911
State	Published - Jun 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planetary systems
stars: individual (XO-2, GSC 03413-00005)

Access to Document

10.1088/0004-6256/137/6/4911

Cite this

@article{6ca79070f74f427ab28d2092d0e27b7d,

title = "The transit light curve project. XII. Six transits of the exoplanet XO-2b",

abstract = "We present photometry of six transits of the exoplanet XO-2b. By combining the light-curve analysis with theoretical isochrones to determine the stellar properties, we find the planetary radius to be 0.996-0.018 +0.031 RJup and the planetary mass to be 0.565 ± 0.054 MJup. These results are consistent with those reported previously, and are also consistent with theoretical models for gas giant planets. The midtransit times are accurate to within 1 minute and are consistent with a constant period. However, the period we derive differs by 2.5σ from the previously published period. More data are needed to tell whether the period is actually variable (as it would be in the presence of an additional body) or if the timing errors have been underestimated.",

keywords = "planetary systems, stars: individual (XO-2, GSC 03413-00005)",

author = "Fernandez, {Jose M.} and Holman, {Matthew J.} and Winn, {Joshua N.} and Guillermo Torres and Avi Shporer and Tsevi Mazeh and Esquerdo, {Gilbert A.} and Everett, {Mark E.}",

year = "2009",

month = jun,

doi = "10.1088/0004-6256/137/6/4911",

language = "English (US)",

volume = "137",

pages = "4911--4916",

journal = "Astronomical Journal",

issn = "0004-6256",

publisher = "IOP Publishing Ltd.",

number = "6",

}

TY - JOUR

T1 - The transit light curve project. XII. Six transits of the exoplanet XO-2b

AU - Fernandez, Jose M.

AU - Holman, Matthew J.

AU - Winn, Joshua N.

AU - Torres, Guillermo

AU - Shporer, Avi

AU - Mazeh, Tsevi

AU - Esquerdo, Gilbert A.

AU - Everett, Mark E.

PY - 2009/6

Y1 - 2009/6

N2 - We present photometry of six transits of the exoplanet XO-2b. By combining the light-curve analysis with theoretical isochrones to determine the stellar properties, we find the planetary radius to be 0.996-0.018 +0.031 RJup and the planetary mass to be 0.565 ± 0.054 MJup. These results are consistent with those reported previously, and are also consistent with theoretical models for gas giant planets. The midtransit times are accurate to within 1 minute and are consistent with a constant period. However, the period we derive differs by 2.5σ from the previously published period. More data are needed to tell whether the period is actually variable (as it would be in the presence of an additional body) or if the timing errors have been underestimated.

AB - We present photometry of six transits of the exoplanet XO-2b. By combining the light-curve analysis with theoretical isochrones to determine the stellar properties, we find the planetary radius to be 0.996-0.018 +0.031 RJup and the planetary mass to be 0.565 ± 0.054 MJup. These results are consistent with those reported previously, and are also consistent with theoretical models for gas giant planets. The midtransit times are accurate to within 1 minute and are consistent with a constant period. However, the period we derive differs by 2.5σ from the previously published period. More data are needed to tell whether the period is actually variable (as it would be in the presence of an additional body) or if the timing errors have been underestimated.

KW - planetary systems

KW - stars: individual (XO-2, GSC 03413-00005)

UR - http://www.scopus.com/inward/record.url?scp=70449867748&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=70449867748&partnerID=8YFLogxK

U2 - 10.1088/0004-6256/137/6/4911

DO - 10.1088/0004-6256/137/6/4911

M3 - Article

AN - SCOPUS:70449867748

SN - 0004-6256

VL - 137

SP - 4911

EP - 4916

JO - Astronomical Journal

JF - Astronomical Journal

IS - 6

ER -

The transit light curve project. XII. Six transits of the exoplanet XO-2b

Abstract

All Science Journal Classification (ASJC) codes

Keywords

Access to Document

Other files and links

Fingerprint

Cite this