New Concept: splashback radius

[arianetrudeau]

Name the new concept
Splashback radius

Describe the concept
Change in the galaxy counts, surface brightness and weak lensing profiles of galaxy clusters, corresponding to the apocenter of the object orbiting into it. Often use as a physically motivated "boundary" for galaxy clusters, compared the more arbitrary r_500 and r_200.

Describe where the concept fits within the existing hierarchy
related to cosmology, weak lensing, galaxy clusters, intracluster light, galaxy counts, accretion, galaxy mass distribution

Provide 1-3 supporting articles
https://ui.adsabs.harvard.edu/abs/2024MNRAS.532.2521M/abstract
https://ui.adsabs.harvard.edu/abs/2016ApJ...825...39M/abstract
https://ui.adsabs.harvard.edu/abs/2021MNRAS.507..963G/abstract

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