The current knowledge of cosmological structure formation suggests that Cold Dark Matter (CDM) halos possess a nonspherical density profile, implying that cosmic structures can be potential sources of gravitational waves via power transfer from scalar perturbations to tensor metric modes in the nonlinear regime. By means of a previously developed mathematical formalism and a triaxial collapse model, we numerically estimate the stochastic gravitational-wave background generated by CDM halos during the fully nonlinear stage of their evolution. Our results suggest that the energy density associated with this background is comparable to that produced by primordial tensor modes at frequencies ν≈10−18–10−17  Hz if the energy scale of inflation is V1/4≈1–2×1015  GeV, and that these gravitational waves could give rise to several cosmological effects, including secondary CMB anisotropy and polarization.

Stochastic gravitational wave background from cold dark matter halos / Carbone, C.; Baccigalupi, C.; Matarrese, S.. - In: PHYSICAL REVIEW D, PARTICLES, FIELDS, GRAVITATION, AND COSMOLOGY. - ISSN 1550-7998. - 73:6(2006), pp. 1-9. [10.1103/PhysRevD.73.063503]

Stochastic gravitational wave background from cold dark matter halos

Baccigalupi, C.;
2006

Abstract

The current knowledge of cosmological structure formation suggests that Cold Dark Matter (CDM) halos possess a nonspherical density profile, implying that cosmic structures can be potential sources of gravitational waves via power transfer from scalar perturbations to tensor metric modes in the nonlinear regime. By means of a previously developed mathematical formalism and a triaxial collapse model, we numerically estimate the stochastic gravitational-wave background generated by CDM halos during the fully nonlinear stage of their evolution. Our results suggest that the energy density associated with this background is comparable to that produced by primordial tensor modes at frequencies ν≈10−18–10−17  Hz if the energy scale of inflation is V1/4≈1–2×1015  GeV, and that these gravitational waves could give rise to several cosmological effects, including secondary CMB anisotropy and polarization.
73
6
1
9
063503
https://arxiv.org/abs/astro-ph/0509680
Carbone, C.; Baccigalupi, C.; Matarrese, S.
File in questo prodotto:
Non ci sono file associati a questo prodotto.

I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.

Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/20.500.11767/16624
Citazioni
  • ???jsp.display-item.citation.pmc??? ND
  • Scopus 14
  • ???jsp.display-item.citation.isi??? 14
social impact