Equation 3 · Part 2 · Comparing the Main Approaches to Precision Cosmology
Symbol sigma_8
What this part means
sigm is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Its job in the formula
sigm is a part of this expression. Its role is fixed by the surrounding article and by the operations shown in the formula.
Full expression→Symbol sigma_8→Article meaning
The passage around this formula
The second, quieter disagreement is the S8 tension. S8 is a combination of the amplitude of matter density fluctuations and the matter density parameter , defined as . Weak gravitational lensing surveys — which measure the distortion of background galaxy shapes by intervening matter, and therefore probe how clustered matter actually is in the late universe — have historically…
Learn the underlying idea
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Sources cited in the surrounding passage
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