(k.k) 1 = { $2(09) + bx2({0}) [(*) + 2) = {}]} [ k 3 Fg,2(k1,...
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(k₁.k₂)² 1 = { $2(09) + bx2({0}) [(*) + 2)² = {}]} [₁ k³ 3 Fg,2(k1, k2; n) = b1 (n) F2 (k1, k2) + − b2(n) +bx²(n) (12.87) Derive the second-order perturbation theory kernel for the galaxy density). (a) Define the scaled tidal field through Kij (x, n) = 1 1 47 G₁²(m) [2; ³; - - 8i, ²] v (x. n). aj di 4л 3 (12.115) Use this definition to relate Kij is to the matter density in real and Fourier space. (b) Begin with the real-space expression of the second-order galaxy density, 8(²)(x, n) = b₁8 (²) +-b₂(8(¹)² +bk²l (1) where on the right-hand side all fields are evaluated at (x, n), and the bias pa- rameters b₁,b2, bk2 are defined at n. Why does the tidal field only appear at second order and in this particular combination? Now pull out the time depen- dence contained in the growth factors, and Fourier transform Eq. (12.116) to arrive at Eq. (12.87). (12.116) (k₁.k₂)² 1 = { $2(09) + bx2({0}) [(*) + 2)² = {}]} [₁ k³ 3 Fg,2(k1, k2; n) = b1 (n) F2 (k1, k2) + − b2(n) +bx²(n) (12.87) Derive the second-order perturbation theory kernel for the galaxy density). (a) Define the scaled tidal field through Kij (x, n) = 1 1 47 G₁²(m) [2; ³; - - 8i, ²] v (x. n). aj di 4л 3 (12.115) Use this definition to relate Kij is to the matter density in real and Fourier space. (b) Begin with the real-space expression of the second-order galaxy density, 8(²)(x, n) = b₁8 (²) +-b₂(8(¹)² +bk²l (1) where on the right-hand side all fields are evaluated at (x, n), and the bias pa- rameters b₁,b2, bk2 are defined at n. Why does the tidal field only appear at second order and in this particular combination? Now pull out the time depen- dence contained in the growth factors, and Fourier transform Eq. (12.116) to arrive at Eq. (12.87). (12.116)
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Materials Science and Engineering An Introduction
ISBN: 978-0470419977
8th edition
Authors: William D. Callister Jr., David G. Rethwisch
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