Transiting Exoplanet Monitoring Project (TEMP). I. Refined System Parameters and Transit Timing Variations of HAT-P-29b

TL;DR

This study refines the orbital parameters of HAT-P-29b using new and existing transit data, finds no evidence of additional planetary perturbers, and updates the transit ephemeris with improved precision.

Contribution

It provides the first comprehensive analysis combining new and published data to refine HAT-P-29b's system parameters and transit timing, and rules out certain perturbers.

Findings

Updated orbital period longer by 17.63 seconds

No evidence of transit timing variations or perturbers

Refined system parameters with improved accuracy

Abstract

We report the photometry of six transits of the hot Jupiter HAT-P-29b obtained from 2013 October to 2015 January. We analyze the new light curves, in combination with the published photometric, and Doppler velocimetric, and spectroscopic measurements, finding an updated orbital ephemeris for the HAT-P-29 system, $T_{\rm C}[0]= 2456170.5494(15)\,[\rm{BJD_{TDB}}]$ and $P=5.723390(13) \,{\rm days}$. It is $17.63\,{\rm s}$ ($4.0\,\sigma$) longer than the previously published value, amounting to errors exceeding $2.5\,\rm{hrs}$ at the time of writing (on UTC 2018 June 1). The measured transit mid-times for HAT-P-29b show no compelling evidence of timing anomalies from a linear model, which rules out the presence of a perturbers with masses greater than $0.6$, $0.7$, $0.5$, and $0.4\,{\rm M_\oplus}$ near the $1:2$, $2:3$, $3:2$, and $2:1$ resonances with HAT-P-29b, respectively.