INTERACTIVE ASTERODENSITY LAB

PhotoRing Effect Simulator

By Jorge I. Zuluaga, Ph.D.

This app lets you explore the PhotoRing effect, introduced in the paper A Novel Method for Identifying Exoplanetary Rings by J.I. Zuluaga, D. Kipping, M. Sucerquia and J. Alvarado-Montes (2015) and developed further in the paper Probing Exoplanetary Rings with Asterodensity Profiling: A PhotoRing Analysis of Kepler-51 by J.I. Zuluaga, S. Numpaque, D. Kipping and J.A. Alvarado-Montes (2026). The effect occurs when rings change the transit silhouette and duration, making the inferred stellar density differ from its true value. Change the System Parameters values and observe how the PR anomaly changes. Want to know how PR is calculated? See this document.

Transit geometry

Planet to scale
Spectral type G starb
-6.55 h

Options

Synthetic light curve

Ringed planet Current position
1.00000.99110.98220.97330.9644T1 (ringed planet): -7.41 hT1-7.41 hT2 (ringed planet): -5.15 hT2-5.15 hT3 (ringed planet): 4.97 hT3+4.97 hT4 (ringed planet): 7.59 hT4+7.59 hT1 (ringless planet): -7.15 hT1T2 (ringless planet): -5.41 hT2T3 (ringless planet): 5.41 hT3T4 (ringless planet): 7.15 hT4Time from mid-transit [hours]Relative flux

Residuals

Ringed − ringless flux, in ppm (autoscaled)
-2070-1035010352070T1 (ringed planet): -7.41 hT1T2 (ringed planet): -5.15 hT2T3 (ringed planet): 4.97 hT3T4 (ringed planet): 7.59 hT4T1 (ringless planet): -7.15 hT1T2 (ringless planet): -5.41 hT2T3 (ringless planet): 5.41 hT3T4 (ringless planet): 7.15 hT4Residual: -420 ppmTime from mid-transit [hours]Residual [ppm]

Options

Other observables

T₁₄15.00 htotal transit duration
T₂₃10.11 hfull transit duration
Transit depth16927 ppmmaximum blocked flux
(a/R★)obs181.8scaled semi-major axis (true 214.9)
bobs0.57impact parameter (true 0.25)
Equivalent Planet Radius0.130 R★1.55 Rₚ · 55% larger from depth