WebIn this work, our aim is to obtain scaling relations for the turbulence parameters l, u and in terms of other quantities like gas density, sound speed, and supernova rate density. The latter parameters are often readily computed from observations or models, so such relations can provide a missing link.

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WebSep 21, 2009 · Physics The Astrophysical Journal We use a robust sample of 11 z ∼ 7 galaxies (z850 dropouts) to estimate the stellar mass density (SMD) of the universe when it was only ∼750 Myr old. WebAug 19, 2024 · The universe’s density is equivalent to 5 protons per cubic meter of space. The universe is made up of 4.9% ordinary (baryonic) matter, 26.8% dark matter, and 68.3% dark energy. Considering only the largest structures, the universe is made up of filaments, voids, superclusters, and galaxy groups, and clusters. billy seymour wiki

Density Determination - University of California, Los Angeles

WebThis surface mass density can be accounted for by the observed gas and stars in the outer disk (little or no dark matter in the disk is required). ... nearby universe. The outer disks of galaxies have received much recent attention, both observational (Thilker et … WebThen there may be 200M galaxies within 1B light years. That seems too high. Density is 5E-20 galaxies per cubic light year. Space per galaxy is 10 19 cubic light years. With … Web1. stars form rapidly as the protogalactic cloud shrinks 2. protogalactic cloud has high densitya 3. galaxy collision strips away gas 4. protogalactic cloud rotates very slowly Spiral galaxy 1. protogalactic cloud has high angular momentum 2. most protogalactic gas settles into a disk Suppose a collision strips gas out of a spiral galaxy. billy sexton