Monthly Archives: September 2019
I had a quick read of the new whitepaper from which this post borrows its title. The main recommendation is for greater funding towards astrostatistics/informatics education which I would generally support. Except that I feel one of our main barriers … Continue reading
One of today’s arXivals examines the use of random forest regression to predict exoplanetary radii given a training set with approx 10 observed properties of exoplanets and their host stars. I don’t quite understand the motivation for a random forest … Continue reading
Today I read an arXival on the topic of data compression or likelihood compression for cosmology, which translates to construction of approximately (or exactly) sufficient summary statistics via a transformation with reference to the assumed likelihood function. As Alsing & … Continue reading
A much improved approach to simulation based inference for cosmology, or maybe some sleight-of-hand?
A recent arXival presents an alternative method for approximating the posterior of some cosmological parameters given an observational dataset for which it is also required to marginalise over a set of nuisance parameters describing the non-linear regime. Previous approaches have … Continue reading
A recent arXival presents a (the arXival authors’ favourite) family of conditional density estimation (CDE) methods as a system for (A) propagating uncertainties downstream in astronomical analyses and (B) conducting likelihood-free inference in astronomy. While some of the individual methods and … Continue reading