Gravitational waves from an early matter era
Gravitational waves from an early matter era
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来自早期物质时代的引力波
DOI:
10.1103/physrevd.79.083511
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发表时间:
2009
影响因子:
5
通讯作者:
Assadullahi H
中科院分区:
文献类型:
--
作者:
Assadullahi H
We investigate the generation of gravitational waves due to the gravitational instability of primordial density perturbations in an early matter-dominated era which could be detectable by experiments such as laser interferometer gravitational wave observatory (LIGO) and laser interferometer space antenna (LISA). We use relativistic perturbation theory to give analytic estimates of the tensor perturbations generated at second order by linear density perturbations. We find that large enhancement factors with respect to the naive second-order estimate are possible due to the growth of density perturbations on sub-Hubble scales. However very large enhancement factors coincide with a breakdown of linear theory for density perturbations on small scales. To produce a primordial gravitational-wave background that would be detectable with LIGO or LISA from density perturbations in the linear regime requires primordial comoving curvature perturbations on small scales of order 0.02 for advanced LIGO or 0.005 for LISA; otherwise numerical calculations of the nonlinear evolution on sub-Hubble scales are required.
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影响因子:
6.4
作者:
J. Dufaux;G. Felder;L. Kofman;Olga Navros
通讯作者:
J. Dufaux;G. Felder;L. Kofman;Olga Navros
DOI:
--
发表时间:
2003
期刊:
影响因子:
--
作者:
D. Lyth
通讯作者:
D. Lyth
影响因子:
5
作者:
Assadullahi H
通讯作者:
Assadullahi H
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.
影响因子:
5
作者:
D. Lyth;Yeinzon Rodriguez Department of Physics Lancaster University-Yeinzon-Rodriguez-Department-of-Physics-Lancaster-102312475;C. D. I. U. A. Narino
通讯作者:
D. Lyth;Yeinzon Rodriguez Department of Physics Lancaster University-Yeinzon-Rodriguez-Department-of-Physics-Lancaster-102312475;C. D. I. U. A. Narino