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2010ApJ...714..462S - Astrophys. J., 714, 462-468 (2010/May-1)

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. and CLOSE L.M.

Abstract (from CDS):

On 2009 June 15 UT the transit of TrES-2b was detected using the University of Arizona's 1.55 m Kuiper Telescope with 2.0-2.5 millimag rms accuracy in the I band. We find a central transit time of Tc= 2454997.76286±0.00035 HJD, an orbital period of P = 2.4706127±0.0000009 days, and an inclination angle of i = 83{fdg}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{fdg}84 ±0°.05. We calculate an insignificant inclination change of Δi = -0{fdg}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 i predicted= 83{fdg}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{fdg}91 ±0{fdg}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.

Abstract Copyright:

Journal keyword(s): planetary systems - stars: individual: TrES-2b

VizieR on-line data: <Available at CDS (J/ApJ/714/462): table2.dat>

Simbad objects: 8

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