21-cm background anisotropies can discern primordial non-gaussianity

被引：82

作者：

Cooray, Asantha ^{[1
]}

机构：

[1] Univ Calif Irvine, Dept Phys & Astron, Irvine, CA 92697 USA

来源：

PHYSICAL REVIEW LETTERS | 2006年 / 97卷 / 26期

关键词：

D O I：

10.1103/PhysRevLett.97.261301

中图分类号：

O4 [物理学];

学科分类号：

0702 ;

摘要：

The non-Gaussianity of initial perturbations provides information on the mechanism that generated primordial density fluctuations. We find that 21-cm background anisotropies due to inhomogeneous neutral hydrogen distribution prior to reionization captures information on primordial non-Gaussianity better than a high-resolution cosmic microwave background anisotropy map. An all-sky 21-cm experiment over the frequency range from 14 to 40 MHz with angular information out to a multipole of 10(5) can limit the primordial non-Gaussianity parameter f(NL)less than or similar to 0.01.

引用

页数：4

共 22 条

[1] Gauge-invariant temperature anisotropies and primordial non-Gaussianity [J].

Bartolo, N ;

Matarrese, S ;

Riotto, A .

PHYSICAL REVIEW LETTERS, 2004, 93 (23)

[2] The cosmic microwave background radiation fluctuations from HI perturbations prior to reionization [J].

Bharadwaj, S ;

Ali, SS .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2004, 352 (01) :142-146

[3]

CHEN G, ASTROPH0606394

[4] Large-scale non-Gaussianities in the 21-cm background anisotropies from the era of reionization [J].

Cooray, A .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2005, 363 (03) :1049-1056

[5] Squared temperature-temperature power spectrum as a probe of the CMB bispectrum [J].

Cooray, A .

PHYSICAL REVIEW D, 2001, 64 (04)

[6] THE SPIN TEMPERATURE OF INTERGALACTIC NEUTRAL HYDROGEN [J].

FIELD, GB .

ASTROPHYSICAL JOURNAL, 1959, 129 (03) :536-550

[7] THE GALAXY CORRELATION HIERARCHY IN PERTURBATION-THEORY [J].

FRY, JN .

ASTROPHYSICAL JOURNAL, 1984, 279 (02) :499-510

[8] Cosmology at low frequencies: The 21 cm transition and the high-redshift Universe [J].

Furlanetto, Steven R. ;

Oh, S. Peng ;

Briggs, Frank H. .

PHYSICS REPORTS-REVIEW SECTION OF PHYSICS LETTERS, 2006, 433 (4-6) :181-301

[9] Non-linear clustering during the cosmic Dark Ages and its effect on the 21-cm background from minihaloes [J].

Iliev, IT ;

Scannapieco, E ;

Martel, H ;

Shapiro, PR .

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 2003, 341 (01) :81-90

[10] Acoustic signatures in the primary microwave background bispectrum [J].

Komatsu, E ;

Spergel, DN .

PHYSICAL REVIEW D, 2001, 63 (06) :13

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