J/ApJ/714/462 Inclination change of TrES-2b (Scuderi+, 2010)
On the apparent orbital inclination change of the extrasolar transiting
planet TrES-2b.
Scuderi L.J., Dittmann J.A., Males J.R., Green E.M., Close L.M.
<Astrophys. J., 714, 462-468 (2010)>
=2010ApJ...714..462S 2010ApJ...714..462S
ADC_Keywords: Planets ; Photometry ; Stars, double and multiple
Keywords: planetary systems - stars: individual (TrES-2b)
Abstract:
On 2009 June 15 UT the transit of TrES-2b was detected using the
University of Arizona's 1.55m Kuiper Telescope with 2.0-2.5 millimag
rms accuracy in the I band. We find a central transit time of
Tc=2454997.76286±0.00035HJD, an orbital period of
P=2.4706127±0.0000009 days, and an inclination angle of
i=83.92°±0.05°, which is consistent with our re-fit of the
original I-band light curve of O'Donovan et al. where we find
i=83.84°±0.05°. We calculate an insignificant inclination
change of Δi =-0.08°±0.07° over the last three years,
and as such, our observations rule out, at the ∼11σ level, the
apparent change of orbital inclination to
ipredicted=83.35°±0.1° as predicted by Mislis & Schmitt
and Mislis et al. for our epoch. Moreover, our analysis of a recently
published Kepler Space Telescope light curve for TrES-2b finds an
inclination of i=83.91°±0.03° for a similar epoch. These
Kepler results definitively rule out change in i as a function of
time. Indeed, we detect no significant changes in any of the orbital
parameters of TrES-2b.
Description:
We observed the transit of TrES-2b on 2009 June 15 UT using the
University of Arizona's 61 inch (1.55m) Kuiper telescope on Mt.
Bigelow, Arizona with the Mont4k CCD, binned 3x3 to 0.43"/pixel. The
original transit observations of O'Donovan et al.
(2006ApJ...651L..61O 2006ApJ...651L..61O) used an I-band filter. After careful
consideration, we chose to use the Arizona I-band filter already
installed on the Mont4k filter wheel in order to match the original
observations as closely as possible with available equipment. This
filter is similar to a Kron-Cousins I-band filter.
Objects:
-----------------------------------------------
RA (2000) DE Designation(s)
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19 07 14.04 +49 18 59.1 TrES-2b = Kepler-1b
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 32 533 Data table of the June 15 2009 light curve
presented in this work
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See also:
V/133 : Kepler Input Catalog (Kepler Mission Team, 2009)
J/A+A/529/A89 : Kepler satellite variability study (Debosscher+, 2011)
J/A+A/510/A107 : TrES-2b multi-band transit observations (Mislis+, 2010)
J/MNRAS/408/1494 : Planetary transits of TrES-2 and TrES-3 (Colon+, 2010)
J/ApJ/692/L9 : Tidal evolution of transiting extrasolar planets (Levrard+,
2009)
J/A+A/500/L45 : Transits of the TrES-2 exoplanet (Mislis+, 2009)
J/A+A/508/1011 : Planetary transit of TrES-1 and TrES-2 (Rabus+, 2009)
J/ApJ/664/1185 : Three transits of the exoplanet TrES-2 (Holman+, 2007)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d HJD Heliocentric Julian Date
16- 23 F8.6 --- RFlux Relative flux in Cousins I band
25- 32 F8.6 --- e_RFlux Error in RFlux
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Emmanuelle Perret [CDS] 16-Apr-2012