The transit light curve project. v. system parameters and stellar rotation period of HD 189733

Joshua N. Winn; Matthew J. Holman; Gregory W. Henry; Anna Roussanova; Keigo Enya; Yuzuru Yoshi; Avi Shporer; Tsevi Mazeh; John Asher Johnson; Norio Narita; Yasushi Suto

doi:10.1086/512159

The transit light curve project. v. system parameters and stellar rotation period of HD 189733

Joshua N. Winn, Matthew J. Holman, Gregory W. Henry, Anna Roussanova, Keigo Enya, Yuzuru Yoshi, Avi Shporer, Tsevi Mazeh, John Asher Johnson, Norio Narita, Yasushi Suto

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

140 Scopus citations

Abstract

We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and planetary radii and the photometric ephemeris. Outside of transits, there are quasi-periodic flux variations with a 13.4 day period that we attribute to stellar rotation. In combination with previous results, we derive upper limits on the orbital eccentricity and on the true angle between the stellar rotation axis and planetary orbit (as opposed to the angle between the projections of those axes on the sky).

Original language	English (US)
Pages (from-to)	1828-1835
Number of pages	8
Journal	Astronomical Journal
Volume	133
Issue number	4
DOIs	https://doi.org/10.1086/512159
State	Published - Apr 2007
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Planetary systems: Formation
Stars: individual (HD 189733)
Stars: rotation

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10.1086/512159

Cite this

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title = "The transit light curve project. v. system parameters and stellar rotation period of HD 189733",

abstract = "We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and planetary radii and the photometric ephemeris. Outside of transits, there are quasi-periodic flux variations with a 13.4 day period that we attribute to stellar rotation. In combination with previous results, we derive upper limits on the orbital eccentricity and on the true angle between the stellar rotation axis and planetary orbit (as opposed to the angle between the projections of those axes on the sky).",

keywords = "Planetary systems, Planetary systems: Formation, Stars: individual (HD 189733), Stars: rotation",

author = "Winn, {Joshua N.} and Holman, {Matthew J.} and Henry, {Gregory W.} and Anna Roussanova and Keigo Enya and Yuzuru Yoshi and Avi Shporer and Tsevi Mazeh and Johnson, {John Asher} and Norio Narita and Yasushi Suto",

year = "2007",

month = apr,

doi = "10.1086/512159",

language = "English (US)",

volume = "133",

pages = "1828--1835",

journal = "Astronomical Journal",

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TY - JOUR

T1 - The transit light curve project. v. system parameters and stellar rotation period of HD 189733

AU - Winn, Joshua N.

AU - Holman, Matthew J.

AU - Henry, Gregory W.

AU - Roussanova, Anna

AU - Enya, Keigo

AU - Yoshi, Yuzuru

AU - Shporer, Avi

AU - Mazeh, Tsevi

AU - Johnson, John Asher

AU - Narita, Norio

AU - Suto, Yasushi

PY - 2007/4

Y1 - 2007/4

N2 - We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and planetary radii and the photometric ephemeris. Outside of transits, there are quasi-periodic flux variations with a 13.4 day period that we attribute to stellar rotation. In combination with previous results, we derive upper limits on the orbital eccentricity and on the true angle between the stellar rotation axis and planetary orbit (as opposed to the angle between the projections of those axes on the sky).

AB - We present photometry of HD 189733 during eight transits of its close-in giant planet, and out-of-transit photometry spanning 2 yr. Using the transit photometry, we determine the stellar and planetary radii and the photometric ephemeris. Outside of transits, there are quasi-periodic flux variations with a 13.4 day period that we attribute to stellar rotation. In combination with previous results, we derive upper limits on the orbital eccentricity and on the true angle between the stellar rotation axis and planetary orbit (as opposed to the angle between the projections of those axes on the sky).

KW - Planetary systems

KW - Planetary systems: Formation

KW - Stars: individual (HD 189733)

KW - Stars: rotation

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DO - 10.1086/512159

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JO - Astronomical Journal

JF - Astronomical Journal

IS - 4

ER -

The transit light curve project. v. system parameters and stellar rotation period of HD 189733

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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