Transit timing variation

arXiv:2609.24645 · astro-ph.EP, astro-ph.IM, astro-ph.SR · Submitted 2026-09-21 · Read on arXiv

astro-ph.EP, astro-ph.IM, astro-ph.SR

Submitted: 2026-09-21

Updated: 2026-09-21

Comments: This work is a peer-reviewed chapter contribution to an edited volume

Project page: https://johannesbuchner.github.io/UltraNest/index.html

License: http://creativecommons.org/licenses/by/4.0/

The gist: The transit timing variation (TTV) method is a key approach to the confirmation, detection, and characterisation of exoplanetary systems.

Terminology

Trace — 18× in this paper · explained in 2 episodes
Accuracy — 9× in this paper · explained in 1 episode
Adam — 9× in this paper · explained in 2 episodes
Bayesian Framework — 8× in this paper · explained in 3 episodes
alpha — 7× in this paper · explained in 1 episode
Degeneracy — 6× in this paper · explained in 3 episodes
Markov Chain Monte Carlo — 6× in this paper
Differential Evolution — 5× in this paper
Alignment — 4× in this paper · explained in 1 episode
Highest Density Interval — 4× in this paper
Auto-Correlation Function — 3× in this paper
Genetic Algorithm — 3× in this paper
Inverse Problem — 3× in this paper · explained in 2 episodes
Maximum A Posteriori — 3× in this paper
Objective Function — 3× in this paper · explained in 2 episodes
Bayesian Inference — 2× in this paper · explained in 5 episodes
Clustering — 2× in this paper · explained in 2 episodes
Gaussian Process — 2× in this paper
Adaptation — 1× in this paper · explained in 1 episode
Curse of Dimensionality — 1× in this paper · explained in 6 episodes
Fine-Tuning — 1× in this paper · explained in 5 episodes
Iterative Refinement — 1× in this paper · explained in 3 episodes
N-body simulations — 1× in this paper · explained in 2 episodes
Transiting Exoplanet Survey Satellite — 1× in this paper

Abstract

The transit timing variation (TTV) method is a key approach to the confirmation, detection, and characterisation of exoplanetary systems. This review discusses the detection of TTVs from transit observations and the origins of TTVs, mainly due to gravitational interactions with perturbing planets, whether transiting or not. Additionally, this work details methodologies for deriving planetary parameters, employing quasi-global and local optimisation algorithms within a Bayesian framework. By analysing TTVs, planetary orbital parameters and dynamical properties can be inferred, providing valuable insights into system formation and evolution. The role of resonances and stability in shaping these systems is reviewed, along with sensitivity biases that influence mass determination. Comparative analyses highlight the unique demographic contributions of TTV systems. TTVs offer a window into the dynamical and physical properties of planetary systems, advancing our understanding of their diversity and stability.

Transit timing variation

Terminology

Abstract

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