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.

UR - http://www.scopus.com/inward/record.url?scp=0001222349&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0001222349&partnerID=8YFLogxK

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 -