A precise estimate of the radius of the exoplanet HD 149026b from spitzer photometry

Philip Nutzman; David Charbonneau; Joshua N. Winn; Heather A. Knutson; Jonathan J. Fortney; Matthew J. Holman; Eric Agol

doi:10.1088/0004-637X/692/1/229

A precise estimate of the radius of the exoplanet HD 149026b from spitzer photometry

Philip Nutzman
, David Charbonneau
, Joshua N. Winn
, Heather A. Knutson
, Jonathan J. Fortney
, Matthew J. Holman
, Eric Agol

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

21 Scopus citations

Abstract

We present Spitzer 8 μm transit observations of the extrasolar planet HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb darkening, allowing for a simpler and more accurate determination of planetary parameters. We measure a planet-star radius ratio of R_p /R* = 0.05158 ± 0.00077, and in combination with ground-based data and independent constraints on the stellar mass and radius, we derive an orbital inclination i = 85°.4^+0°.9_-0°.8 of and a planet radius of R_p = 0.755 ± 0.040 R_J. These measurements further support models in which the planet is greatly enriched in heavy elements.

Original language	English (US)
Pages (from-to)	229-235
Number of pages	7
Journal	Astrophysical Journal
Volume	692
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/692/1/229
State	Published - Feb 10 2009
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

planetary systems
techniques: photometric

Access to Document

10.1088/0004-637X/692/1/229

Cite this

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title = "A precise estimate of the radius of the exoplanet HD 149026b from spitzer photometry",

abstract = "We present Spitzer 8 μm transit observations of the extrasolar planet HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb darkening, allowing for a simpler and more accurate determination of planetary parameters. We measure a planet-star radius ratio of Rp /R* = 0.05158 ± 0.00077, and in combination with ground-based data and independent constraints on the stellar mass and radius, we derive an orbital inclination i = 85°.4+0°.9-0°.8 of and a planet radius of Rp = 0.755 ± 0.040 RJ. These measurements further support models in which the planet is greatly enriched in heavy elements.",

keywords = "planetary systems, techniques: photometric",

author = "Philip Nutzman and David Charbonneau and Winn, \{Joshua N.\} and Knutson, \{Heather A.\} and Fortney, \{Jonathan J.\} and Holman, \{Matthew J.\} and Eric Agol",

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doi = "10.1088/0004-637X/692/1/229",

language = "English (US)",

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TY - JOUR

T1 - A precise estimate of the radius of the exoplanet HD 149026b from spitzer photometry

AU - Nutzman, Philip

AU - Charbonneau, David

AU - Winn, Joshua N.

AU - Knutson, Heather A.

AU - Fortney, Jonathan J.

AU - Holman, Matthew J.

AU - Agol, Eric

PY - 2009/2/10

Y1 - 2009/2/10

N2 - We present Spitzer 8 μm transit observations of the extrasolar planet HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb darkening, allowing for a simpler and more accurate determination of planetary parameters. We measure a planet-star radius ratio of Rp /R* = 0.05158 ± 0.00077, and in combination with ground-based data and independent constraints on the stellar mass and radius, we derive an orbital inclination i = 85°.4+0°.9-0°.8 of and a planet radius of Rp = 0.755 ± 0.040 RJ. These measurements further support models in which the planet is greatly enriched in heavy elements.

AB - We present Spitzer 8 μm transit observations of the extrasolar planet HD 149026b. At this wavelength, transit light curves are weakly affected by stellar limb darkening, allowing for a simpler and more accurate determination of planetary parameters. We measure a planet-star radius ratio of Rp /R* = 0.05158 ± 0.00077, and in combination with ground-based data and independent constraints on the stellar mass and radius, we derive an orbital inclination i = 85°.4+0°.9-0°.8 of and a planet radius of Rp = 0.755 ± 0.040 RJ. These measurements further support models in which the planet is greatly enriched in heavy elements.

KW - planetary systems

KW - techniques: photometric

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UR - https://www.scopus.com/pages/publications/64849101006#tab=citedBy

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DO - 10.1088/0004-637X/692/1/229

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AN - SCOPUS:64849101006

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VL - 692

SP - 229

EP - 235

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

A precise estimate of the radius of the exoplanet HD 149026b from spitzer photometry

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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