TY - JOUR
T1 - Global texture as the origin of large-scale structure
T2 - Numerical simulations of evolution
AU - Spergel, David N.
AU - Turok, Neil
AU - Press, William H.
AU - Ryden, Barbara S.
PY - 1991/1/1
Y1 - 1991/1/1
N2 - Numerical simulations explore the evolution of global texture in an expanding universe. The evolution is surprisingly simpleknots, regions with a nonzero winding number, collapse and unwind at a fixed rate per horizon volume per horizon time; the comoving density of knots n unwinding in a conformal time interval d obeys dnd0.04-4. During each collapse, asymmetries are damped and the texture knots appear to approach an exact spherically symmetric scaling solution. The locations of the knots are anticorrelated on scales smaller than the horizon scale and uncorrelated on larger scales. We calculate the density and pressure in the texture "scaling solution" in the matter and radiation eras. We estimate (in a universe dominated by cold dark matter with =1) that of order ten knots of angular radius of order 8°should be visible on the microwave sky.
AB - Numerical simulations explore the evolution of global texture in an expanding universe. The evolution is surprisingly simpleknots, regions with a nonzero winding number, collapse and unwind at a fixed rate per horizon volume per horizon time; the comoving density of knots n unwinding in a conformal time interval d obeys dnd0.04-4. During each collapse, asymmetries are damped and the texture knots appear to approach an exact spherically symmetric scaling solution. The locations of the knots are anticorrelated on scales smaller than the horizon scale and uncorrelated on larger scales. We calculate the density and pressure in the texture "scaling solution" in the matter and radiation eras. We estimate (in a universe dominated by cold dark matter with =1) that of order ten knots of angular radius of order 8°should be visible on the microwave sky.
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U2 - 10.1103/PhysRevD.43.1038
DO - 10.1103/PhysRevD.43.1038
M3 - Article
AN - SCOPUS:0001222349
VL - 43
SP - 1038
EP - 1046
JO - Physical Review D - Particles, Fields, Gravitation and Cosmology
JF - Physical Review D - Particles, Fields, Gravitation and Cosmology
SN - 1550-7998
IS - 4
ER -