Follow-up paper ideas

[hippke]

Searches

• K2 multiples
• Paper: Quad system
• Paper: New multis
• K2 full
• K2 multiples
• K1 full
• TESS

Theory

• Determine effect of TTVs on SDE:
• Is a TTV-smeared transit more transit-like (or more box-like)?
• Are very short transits (outside of Figure 5) detectable?
• See previous estimates about exoplanet detectability around White Dwarfs (Agol 2011) and other exotic places (Imara & Stefano 2017).
• If this is realistic, how should TLS be adapted?
• Simply change the shortest transit duration to 1 cadence?
• How big is the morphological shape deformation with "long" cadences?
• Is the best transit template V-shaped?
• Account for TTVs
• For BLS this has been implemeneted: Quasiperiodic Automated Transit Search (Carter & Agol 2012)
• Is this computationally realistic fo TLS? The major additional effort should be non-constant phase folding?
• Determine detection biases:
• Observational biases for transiting planets (Kipping & Sandford 2016) are partly due to the box shaped transit fit (when using BLS).
• Even when fitting a better transit shape like the TLS template, similar biases can be expected since our template curve cannot be a perfect fit for all transits.
• For example, an eccentric or V-form grazing transit shape is substantially different from a box.
• This causes increased noise, resulting in lower detection efficiency.
• A few real, but rare, transit shapes might be closer to a box than to the reference transit template, resulting in a different set of observational biases.
• Characterizing these can be a natural follow-up work.
• Benchmark machine-learning vs. TLS:
• Speed
• Detection efficiency
• Develop a heuristic of a shallowest transit depth to be fitted, as a function of noise in the data, period, and other factors.
• What is the optimal (most sparse but still accurate) period grid to re-calculate the transit shape to correct for morphological deformations
• PLATOsim

[reneheller]

– René to request 3 years of DFG funding for a PhD student to investigate detrending methods (see my e-mail for proposal sketch)
– as for "TTV-smeared transit": I suspect a running median filter will transform it into a (more or less) un-smeared transit
– maybe instead of / in addition to PLATOSim we could use the ready-to-use & publicly available PLATO Solar-like Light-curve Simulator (PSLS, https://sites.lesia.obspm.fr/psls) to generate realistic PLATO light curves with transits