Constraining the epoch-of-reionization model parameters with the 21-cm bispectrum

被引：44

作者：

Shimabukuro, Hayato ^{[1
,2
,3
]}

Yoshiura, Shintaro ^{[2
]}

Takahashi, Keitaro ^{[2
]}

Yokoyama, Shuichiro ^{[4
]}

Ichiki, Kiyotomo ^{[1
,5
]}

机构：

[1] Nagoya Univ, Grad Sch Sci, Dept Phys, Nagoya, Aichi 4648602, Japan

[2] Kumamoto Univ, Dept Phys, Kumamoto 8608555, Japan

[3] Observ Paris, LERMA, F-75014 Paris, France

[4] Rikkyo Univ, Dept Phys, Tokyo, Japan

[5] Nagoya Univ, Kobayashi Maskawa Inst Origin Particles & Univers, Nagoya, Aichi 4648602, Japan

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2017年 / 468卷 / 02期

关键词：

intergalactic medium; cosmology: theory; dark ages; reionization; first stars; SPIN-TEMPERATURE-FLUCTUATIONS; CM POWER SPECTRUM; COSMIC DAWN; 1ST STARS; SIGNAL; HISTORY; IMPACT; TOOL;

D O I：

10.1093/mnras/stx530

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a Fisher analysis to estimate the expected constraints on the epoch-of-reionization (EoR) model parameters (i. e. minimum virial temperature, the ionizing efficiency and the mean free path of ionizing photons) taking into account the thermal noise of the existing telescopes, MWA and LOFAR. We consider how the inclusion of the 21-cm bispectrum improves the constraints compared to using the power spectrum alone. Assuming that we perfectly remove the foregrounds, we found that the bispectrum, which is calculated by the 21-CM FAST code, can constrain the EoR model parameters more tightly than the power spectrum since the bispectrum is more sensitive to the EoR model parameters than the power spectrum. We also found that degeneracy between the EoR model parameters can be reduced by combining the bispectrum with the power spectrum.

引用

页码：1542 / 1550

页数：9

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