IWARA2026 - 12th International Workshop on Astronomy and Relativistic Astrophysics

Implementation of Profile Likelihood approach for cosmological parameter estimation in SimpleMC

Not scheduled

20m

Auditorio José Adem, Mexico

Poster

Speaker

Valeria Herrera Tinoco (Instituto de Ciencias Físicas- UNAM)

Description

This work aims to implement likelihood profile techniques within the SimpleMC framework as a frequentist approach to cosmological parameter estimation. The method consists of fixing a parameter of interest while doing MLE with respect to the remaining free parameters, allowing the construction of one-dimensional likelihood profiles. To improve the efficiency of the parameter exploration, covariance information from previous MCMC chains will be used to define adaptive proposal steps. The resulting implementation will provide a complementary alternative to Bayesian inference for parameter estimation and confidence interval construction, and will be applicable to a variety of cosmological models and parameters.