English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

The Hubble constant, H0, or its dimensionless equivalent, "little h", is afundamental cosmological property that is now known to an accuracy better thana few percent. Despite its cosmological nature, little h commonly appears inthe measured properties of individual galaxies. This can pose unique challengesfor users of such data, particularly with survey data. In this paper we showhow little h arises in the measurement of galaxies, how to comparelike-properties from different datasets that have assumed different little hcosmologies, and how to fairly compare theoretical data with observed data,where little h can manifest in vastly different ways. This last point isparticularly important when observations are used to calibrate galaxy formationmodels, as calibrating with the wrong (or no) little h can lead to disastrousresults when the model is later converted to the correct h cosmology. We arguethat in this modern age little h is an anachronism, being one of leastuncertain parameters in astrophysics, and we propose that observers andtheorists instead treat this uncertainty like any other. We conclude with a"cheat sheet" of nine points that should be followed when dealing with little hin data analysis.

Damn You, Little h! (or, Real-World Applications Of The Hubble Constant Using Observed And Simulated Data)