Astronomers use a technique called stellar stereography todetermine the density of stars in a star cluster from theobserved (two-dimensional) density that can be analyzedfrom a photograph. Suppose that in a spherical cluster ofradius R the density of stars depends only on the distancefrom the center of the cluster. If the perceived star density isgiven by y(s) , where is the observed planar distance fromthe center of the cluster, and x (r ) is the actual density, it canbe shown that y(s) = integral s to r 2 r /sqrt ( r2 - s2 ) x(r) dr If the actual density of stars in a cluster is x (r ) = 1/2 (R-r)2 ,find the perceived density y(s)
Astronomers use a technique called stellar stereography todetermine the density of stars in a star cluster from theobserved (two-dimensional) density that can be analyzedfrom a photograph. Suppose that in a spherical cluster ofradius R the density of stars depends only on the distancefrom the center of the cluster. If the perceived star density isgiven by y(s) , where is the observed planar distance fromthe center of the cluster, and x (r ) is the actual density, it canbe shown that y(s) = integral s to r 2 r /sqrt ( r2 - s2 ) x(r) dr If the actual density of stars in a cluster is x (r ) = 1/2 (R-r)2 ,find the perceived density y(s)
Calculus: Early Transcendentals
8th Edition
ISBN:9781285741550
Author:James Stewart
Publisher:James Stewart
Chapter1: Functions And Models
Section: Chapter Questions
Problem 1RCC: (a) What is a function? What are its domain and range? (b) What is the graph of a function? (c) How...
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Astronomers use a technique called stellar stereography to
determine the density of stars in a star cluster from the
observed (two-dimensional) density that can be analyzed
from a photograph. Suppose that in a spherical cluster of
radius R the density of stars depends only on the distance
from the center of the cluster. If the perceived star density is
given by y(s) , where is the observed planar distance from
the center of the cluster, and x (r ) is the actual density, it can
be shown that
y(s) = integral s to r 2 r /sqrt ( r2 - s2 ) x(r) dr
If the actual density of stars in a cluster is x (r ) = 1/2 (R-r)2 ,
find the perceived density y(s)
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