J/AJ/135/68 HD 189733 differential light curve (Henry+, 2008)
The rotation period of the planet-hosting star HD 189733.
Henry G.W., Winn J.N.
<Astron. J., 135, 68-71 (2008)>
=2008AJ....135...68H 2008AJ....135...68H
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry
Keywords: planetary systems - planetary systems: formation -
stars: individual (HD 189733) - stars: rotation
Abstract:
We present synoptic optical photometry of HD 189733, the
chromospherically active parent star of one of the most intensively
studied exoplanets. We have significantly extended the timespan of our
previously reported observations and refined the estimate of the
stellar rotation period by more than an order of magnitude:
P=11.953±0.009-days. We derive a lower limit on the inclination of
the stellar rotation axis of 54° (with 95% confidence),
corroborating earlier evidence that the stellar spin axis and
planetary orbital axis are well aligned.
Description:
We acquired 314 good observations of HD 189733 between 2005 October
and 2007 July with the T10 0.8m automated photometric telescope (APT)
at Fairborn Observatory in southern Arizona.
Objects:
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RA (2000) DE Designation(s)
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20 00 43.7 +22 42 39 HD 189733 = HD 189733
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 60 314 Individual photometric observations of HD 189733
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 20 F7.4 mag D-A Star D minus Star A differential magnitude
in (b+y)/2 passband (1)
22- 28 F7.4 mag D-B Star D minus Star B differential magnitude
in (b+y)/2 passband (1)
30- 36 F7.4 mag D-C Star D minus Star C differential magnitude
in (b+y)/2 passband (1)
38- 44 F7.4 mag C-A Star C minus Star A differential magnitude
in (b+y)/2 passband (1)
46- 52 F7.4 mag C-B Star C minus Star B differential magnitude
in (b+y)/2 passband (1)
54- 60 F7.4 mag B-A Star B minus Star A differential magnitude
in (b+y)/2 passband (1)
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Note (1): The target star D is HD 189733, and the comparison stars A, B,
and C are HD 189410, HD 191260, and HD 189410, respectively.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 11-Feb-2011