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The radius, at which a galaxy group stops the Hubble stream, and the group mass: an exact analytical solution

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arxiv 1907.08716 v2 pith:EXWQDBEU submitted 2019-07-19 astro-ph.CO astro-ph.GA

Anton N. Baushev This is my paper · ORCID
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keywords groupanalyticalexactgalaxyhubblemassradiusstream
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abstract

The gravitational field of a galaxy group or cluster slows down the Hubble stream and turns it speed to zero at some radius $R_0$. We offer an exact analytical relation between $R_0$ and the mass of the group.

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  1. A semi-analytical approach to cosmic void evolution

    astro-ph.CO 2026-07 conditional novelty 5.0 of 10

    Homogeneous spheroidal voids in ΛCDM become only slightly rounder, deviate from linear theory by z≈8, and retain substantial matter density μ>0.5 independent of eccentricity.

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