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Astronomy · L5 · Hierarchical Halo Assembly and Galaxy Growth

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Merger-tree-style assembly of dark matter halos over cosmic time, and how baryonic cooling, star formation, and feedback build the galaxies within them.

by @openstemUpdated Astronomy
Small halo A(high redshift)Halo mergerSmall halo B(high redshift)Larger halo(intermediate redshift)Further mergers +smooth accretionPresent-daygroup/cluster-scale haloGas cools, forms starsin central galaxyFeedback(supernovae, AGN)regulates growthElliptical galaxy(dispersion-supported)Spiral galaxy(disk, rotation-supported)Major merger of central galaxiesQuiescent accretion, no major merger

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