Transit timing analysis of the exoplanet TrES-5 b. Possible existence of the exoplanet TrES-5 c

TL;DR

This study reports transit timing variations for exoplanet TrES-5b, suggesting a potential second planet in the system, based on extensive observational data and N-body modeling.

Contribution

First detection of transit timing variations for TrES-5b using a large dataset, indicating possible existence of a second exoplanet in the system.

Findings

Detected timing variations with ~0.0016 days amplitude

Identified a potential second planet of ~0.24 Jupiter masses

Suggested a 1:2 orbital resonance for the second planet

Abstract

In this work, we present transit timing variations detected for the exoplanet TrES-5b. To obtain the necessary amount of photometric data for this exoplanet, we have organized an international campaign to search for exoplanets based on the Transit Timing Variation method (TTV) and as a result of this we collected 30 new light curves, 15 light curves from the Exoplanet Transit Database (ETD) and 8 light curves from the literature for the timing analysis of the exoplanet TrES-5b. We have detected timing variations with a semi-amplitude of A ~ 0.0016 days and a period of P ~ 99 days. We carried out the N-body modeling based on the three-body problem. The detected perturbation of TrES-5b may be caused by a second exoplanet in the TrES-5 system. We have calculated the possible mass and resonance of the object: M ~ 0.24MJup at a 1:2 Resonance.