ericagol
commented
4 years ago We simulated light curves using Phoenix-DRIFT models (Witte et al. 2009) and found that quadratic limb-darkening was sufficient to recover accurate model parameters.
We also fit the data with a quartic limb-darkening law, and found that BIC prefers the quadratic law, and that the best-fit parameters changed negligibly.
[x] ...the quadratic limb-darkening law was used with two coefficients per passband. Since the data used are of high quality, in my opinion, the four-parameter LD formula and the critical-foreshortening-angle approach (Claret 2018) should be calculated for the Spitzer channels and used during the analysis.
[x] Which is the best limb-darkening law to use for the photo dynamical analysis? Claret et al. (2012) computed coefficients for several limb-darkening parameterizations in the Spitzer passbands for stars with temperatures in the range 1500-4800 K. Which of these laws has the best RMS? Will this impact the radius inference?
[x] Does sampling from
(R_p/R_*)versus(R_p/R_*)^2make a difference to the result?[x] Does the foreshortened limb-darkening model make a difference to the results? Claret (2018) presents the method for computing these coefficients.