The prograde orbit of exoplanet TrES-2b

Joshua N. Winn; John Asher Johnson; Norio Narita; Yasushi Suto; Edwin L. Turner; Debra A. Fischer; R. Paul Butler; Steven S. Vogt; Francis T. O'Donovan; B. Scott Gaudi

doi:10.1086/589235

The prograde orbit of exoplanet TrES-2b

Joshua N. Winn
, John Asher Johnson
, Norio Narita
, Yasushi Suto
, Edwin L. Turner
, Debra A. Fischer
, R. Paul Butler
, Steven S. Vogt
, Francis T. O'Donovan
, B. Scott Gaudi

Astrophysical Sciences

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

45 Scopus citations

Abstract

We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9° ± 12° relative to the projected stellar equator. With 98% confidence, the orbit is prograde.

Original language	English (US)
Pages (from-to)	1283-1288
Number of pages	6
Journal	Astrophysical Journal
Volume	682
Issue number	2
DOIs	https://doi.org/10.1086/589235
State	Published - Aug 1 2008

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Planetary systems: Formation
Stars: Individual (GSC 03549-02811, TrES-2)
Stars: Rotation

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10.1086/589235

Cite this

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title = "The prograde orbit of exoplanet TrES-2b",

abstract = "We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9° ± 12° relative to the projected stellar equator. With 98\% confidence, the orbit is prograde.",

keywords = "Planetary systems, Planetary systems: Formation, Stars: Individual (GSC 03549-02811, TrES-2), Stars: Rotation",

author = "Winn, \{Joshua N.\} and Johnson, \{John Asher\} and Norio Narita and Yasushi Suto and Turner, \{Edwin L.\} and Fischer, \{Debra A.\} and Butler, \{R. Paul\} and Vogt, \{Steven S.\} and O'Donovan, \{Francis T.\} and \{Scott Gaudi\}, B.",

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doi = "10.1086/589235",

language = "English (US)",

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T1 - The prograde orbit of exoplanet TrES-2b

AU - Winn, Joshua N.

AU - Johnson, John Asher

AU - Narita, Norio

AU - Suto, Yasushi

AU - Turner, Edwin L.

AU - Fischer, Debra A.

AU - Butler, R. Paul

AU - Vogt, Steven S.

AU - O'Donovan, Francis T.

AU - Scott Gaudi, B.

PY - 2008/8/1

Y1 - 2008/8/1

N2 - We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9° ± 12° relative to the projected stellar equator. With 98% confidence, the orbit is prograde.

AB - We monitored the Doppler shift of the G0 V star TrES-2 throughout a transit of its giant planet. The anomalous Doppler shift due to stellar rotation (the Rossiter-McLaughlin effect) is discernible in the data, with a signal-to-noise ratio of 2.9, even though the star is a slow rotator. By modeling this effect we find that the planet's trajectory across the face of the star is tilted by -9° ± 12° relative to the projected stellar equator. With 98% confidence, the orbit is prograde.

KW - Planetary systems

KW - Planetary systems: Formation

KW - Stars: Individual (GSC 03549-02811, TrES-2)

KW - Stars: Rotation

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DO - 10.1086/589235

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JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 2

ER -

The prograde orbit of exoplanet TrES-2b

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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