Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 468, Issue 2, Pages 1542-1550Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/stx530
Keywords
intergalactic medium; cosmology: theory; dark ages, reionization, first stars
Categories
Funding
- Ministry of Education, Culture, Sports, Science and Technology (MEXT) of Japan [24340048, 26610048, 15H05896, 16H05999, 25-3015, 16J01585, 15K17659, 16H01103]
- Grants-in-Aid for Scientific Research [16H05999, 16H01103, 16J01585, 15H05896, 26610048, 15K17659, 17H01110, 17H01131] Funding Source: KAKEN
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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.
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