J/ApJ/715/421 Relative photometry of WASP-3 (Tripathi+, 2010)
A prograde, low-inclination orbit for the very hot Jupiter WASP-3b.
Tripathi A., Winn J.N., Johnson J.A., Howard A.W., Halverson S.,
Marcy G.W., Holman M.J., de Kleer K.R., Carter J.A., Esquerdo G.A.,
Everett M.E., Cabrera N.E.
<Astrophys. J., 715, 421-428 (2010)>
=2010ApJ...715..421T 2010ApJ...715..421T
ADC_Keywords: Stars, double and multiple ; Photometry ; Planets
Keywords: planetary systems - stars: activity - stars: individual (WASP-3) -
techniques: radial velocities
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 140m/s. 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.
Description:
Photometric observations of transits were conducted on UT 2008 May 15,
June 10, June 21, and UT 2009 May 12 and May 25, using Keplercam on
the 1.2m telescope at the Fred L. Whipple Observatory (FLWO) on Mount
Hopkins, Arizona. For the observations in 2008 we used a Sloan i'
filter, and for those in 2009 we used a Sloan g' filter.
We also observed the complete transit of UT 2008 July 13 with the
University of Hawaii 2.2m (UH 2.2m) telescope on Mauna Kea, Hawaii, in
z' filter.
Objects:
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RA (2000) DE Designation(s) Orbital period (d)
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18 34 31.62 +35 39 41.5 WASP 3 = TYC 2636-195-1 (P = 1.846834)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 32 1934 Relative photometry of WASP-3
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See also:
J/ApJ/692/L9 : Tidal evolution of transiting extrasolar planets (Levrard+,
2009)
J/PASP/120/1128 : Calibrated griz magnitudes of Tycho star (Ofek, 2008)
J/MNRAS/379/816 : SuperWASP-North extrasolar planet candidates (Street+, 2007)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian Date
16- 22 F7.5 --- RFlux Relative flux
24- 30 F7.5 --- e_RFlux Uncertainty in RFlux
32 I1 --- Obs Observatory code; 1=FLWO 1.2m (Fred L. Whipple
Obs.), 2=UH 2.2m (Univ. Hawaii)
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 14-May-2012