The Value of $H_0$ from Gaussian Processes

Understand

A new non-parametric method based on Gaussian Processes was proposed recently to measure the Hubble constant $H_0$.

• The freedom in this approach comes in the chosen covariance function, which determines how smooth the process is and how nearby points are correlated.
• We perform coverage tests with a thousand mock samples within the LCDM model in order to determine what covariance function provides the least biased results.
• The function Matern(5/2) is the best with sligthly higher errors than other covariance functions, although much more stable when compared to standard parametric analyses.