Monthly Archives: July 2019

Non-parametric N[ion]

In a recent arXival it is proposed to estimate the relationship between redshift and the log comoving density of ionising photons with a “non-parametric” Bayesian approach, such that “ can take any value at any redshift”. In fact, the authors … Continue reading

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Understanding coverage: a big ‘tension headache’

If you selected a sample of 100 astronomers/cosmologists who had previously published a paper in which was set forth a Bayesian analysis of some data, and you asked each of them to explain what a 95% posterior credible interval was, … Continue reading

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A positive example: S0-2

A new arXival (of a Science paper) by Do et al. offers a positive example of how the contemporary best practice approach to Bayesian model building can be brought to bear on an interesting astrophysical dataset.  The authors aim to … Continue reading

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How to resolve tension between local and cosmological estimates of H0: Juke the stats!

A recent arXival has proposed a new approach to resolving the tension between the local and cosmological estimates of .  Or, more specifically, to solve the pesky problem of having to fit the ‘extended physics’ models to the data—simply vary … Continue reading

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