A prograde, low-inclination orbit for the very hot jupiter WASP-3b

Anjali Tripathi; Joshua N. Winn; John Asher Johnson; Andrew W. Howard; Sam Halverson; Geoffreyw Marcy; Matthew J. Holman; Katherine R. De Kleer; Joshua A. Carter; Gilbert A. Esquerdo; Marke Everett; Nicole E. Cabrera

doi:10.1088/0004-637X/715/1/421

A prograde, low-inclination orbit for the very hot jupiter WASP-3b

Anjali Tripathi, Joshua N. Winn, John Asher Johnson, Andrew W. Howard, Sam Halverson, Geoffreyw Marcy, Matthew J. Holman, Katherine R. De Kleer, Joshua A. Carter, Gilbert A. Esquerdo, Marke Everett, Nicole E. Cabrera

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

35 Scopus citations

Abstract

We present new spectroscopic and photometric observations of the transiting exoplanetary system WASP-3. Spectra obtained during two separate transits exhibit the Rossiter-McLaughlin (RM) effect and allow us to estimate the sky-projected angle between the planetary orbital axis and the stellar rotation axis, λ = 3.3^+2.5 _-4.4deg. This alignment between the axes suggests that WASP-3b has a low orbital inclination relative to the equatorial plane of its parent star. During our first night of spectroscopic measurements, we observed an unexpected redshift briefly exceeding the expected sum of the orbital and RM velocities by 140ms^-1. This anomaly could represent the occultation of material erupting from the stellar photosphere, although it is more likely to be an artifact caused by moonlight scattered into the spectrograph.

Original language	English (US)
Pages (from-to)	421-428
Number of pages	8
Journal	Astrophysical Journal
Volume	715
Issue number	1
DOIs	https://doi.org/10.1088/0004-637X/715/1/421
State	Published - 2010
Externally published	Yes

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

Keywords

Planetary systems
Stars: activity
Stars: individual (WASP-3)
Techniques: radial velocities

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10.1088/0004-637X/715/1/421

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title = "A prograde, low-inclination orbit for the very hot jupiter WASP-3b",

abstract = "We present new spectroscopic and photometric observations of the transiting exoplanetary system WASP-3. Spectra obtained during two separate transits exhibit the Rossiter-McLaughlin (RM) effect and allow us to estimate the sky-projected angle between the planetary orbital axis and the stellar rotation axis, λ = 3.3+2.5 -4.4deg. This alignment between the axes suggests that WASP-3b has a low orbital inclination relative to the equatorial plane of its parent star. During our first night of spectroscopic measurements, we observed an unexpected redshift briefly exceeding the expected sum of the orbital and RM velocities by 140ms-1. This anomaly could represent the occultation of material erupting from the stellar photosphere, although it is more likely to be an artifact caused by moonlight scattered into the spectrograph.",

keywords = "Planetary systems, Stars: activity, Stars: individual (WASP-3), Techniques: radial velocities",

author = "Anjali Tripathi and Winn, {Joshua N.} and Johnson, {John Asher} and Howard, {Andrew W.} and Sam Halverson and Geoffreyw Marcy and Holman, {Matthew J.} and {De Kleer}, {Katherine R.} and Carter, {Joshua A.} and Esquerdo, {Gilbert A.} and Marke Everett and Cabrera, {Nicole E.}",

year = "2010",

doi = "10.1088/0004-637X/715/1/421",

language = "English (US)",

volume = "715",

pages = "421--428",

journal = "Astrophysical Journal",

issn = "0004-637X",

publisher = "IOP Publishing Ltd.",

number = "1",

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TY - JOUR

T1 - A prograde, low-inclination orbit for the very hot jupiter WASP-3b

AU - Tripathi, Anjali

AU - Winn, Joshua N.

AU - Johnson, John Asher

AU - Howard, Andrew W.

AU - Halverson, Sam

AU - Marcy, Geoffreyw

AU - Holman, Matthew J.

AU - De Kleer, Katherine R.

AU - Carter, Joshua A.

AU - Esquerdo, Gilbert A.

AU - Everett, Marke

AU - Cabrera, Nicole E.

PY - 2010

Y1 - 2010

N2 - We present new spectroscopic and photometric observations of the transiting exoplanetary system WASP-3. Spectra obtained during two separate transits exhibit the Rossiter-McLaughlin (RM) effect and allow us to estimate the sky-projected angle between the planetary orbital axis and the stellar rotation axis, λ = 3.3+2.5 -4.4deg. This alignment between the axes suggests that WASP-3b has a low orbital inclination relative to the equatorial plane of its parent star. During our first night of spectroscopic measurements, we observed an unexpected redshift briefly exceeding the expected sum of the orbital and RM velocities by 140ms-1. This anomaly could represent the occultation of material erupting from the stellar photosphere, although it is more likely to be an artifact caused by moonlight scattered into the spectrograph.

AB - We present new spectroscopic and photometric observations of the transiting exoplanetary system WASP-3. Spectra obtained during two separate transits exhibit the Rossiter-McLaughlin (RM) effect and allow us to estimate the sky-projected angle between the planetary orbital axis and the stellar rotation axis, λ = 3.3+2.5 -4.4deg. This alignment between the axes suggests that WASP-3b has a low orbital inclination relative to the equatorial plane of its parent star. During our first night of spectroscopic measurements, we observed an unexpected redshift briefly exceeding the expected sum of the orbital and RM velocities by 140ms-1. This anomaly could represent the occultation of material erupting from the stellar photosphere, although it is more likely to be an artifact caused by moonlight scattered into the spectrograph.

KW - Planetary systems

KW - Stars: activity

KW - Stars: individual (WASP-3)

KW - Techniques: radial velocities

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U2 - 10.1088/0004-637X/715/1/421

DO - 10.1088/0004-637X/715/1/421

M3 - Article

AN - SCOPUS:77951862137

SN - 0004-637X

VL - 715

SP - 421

EP - 428

JO - Astrophysical Journal

JF - Astrophysical Journal

IS - 1

ER -

A prograde, low-inclination orbit for the very hot jupiter WASP-3b

Abstract

All Science Journal Classification (ASJC) codes

Keywords

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