Cosmic microwave background constraints on a physical model of reionization
| dc.contributor.author | Paul, S | |
| dc.contributor.author | Choudhury, T.R | |
| dc.contributor.author | Mukherjee, S | |
| dc.date.accessioned | 2021-07-02T10:25:28Z | |
| dc.date.available | 2021-07-02T10:25:28Z | |
| dc.date.issued | 2021 | |
| dc.description.abstract | We study constraints on allowed reionization histories by comparing predictions of a physical seminumerical model with secondary temperature and polarization anisotropies of the cosmic microwave background (CMB). Our model has four free parameters characterizing the evolution of ionizing efficiency ζ and the minimum mass Mmin of haloes that can produce ionizing radiation. Comparing the model predictions with the presently available data of the optical depth τ and kinematic Sunyaev-Zeldovich signal, we find that we can already rule out a significant region of the parameter space. We limit the duration of reionization Δz = 1.30+0.19-0.60 (Δz < 2.9 at 99 per cent C.L.), one of the tightest constraints on the parameter. The constraints mildly favour Mmin ≳ 109 M⊙ (at 68 per cent C.L.) at z ∼ 8, thus indicating the presence of reionization feedback. Our analysis provides an upper bound on the secondary B-mode amplitude Dl=200BB < 18 nK2 at 99 per cent C.L. We also study how the constraints can be further tightened with upcoming space- and ground-based CMB missions. Our study, which relies solely on CMB data, has implications not only for upcoming CMB surveys for detecting primordial gravitational waves but also redshifted 21 cm studies. | en_US |
| dc.identifier.citation | Paul, S. et al. (2021). Cosmic microwave background constraints on a physical model of reionization. Monthly Notices of the Royal Astronomical Society: Letters, 501(1), L7-L11 | en_US |
| dc.identifier.issn | 17453925 | |
| dc.identifier.uri | 10.1093/mnrasl/slaa185 | |
| dc.identifier.uri | http://hdl.handle.net/10566/6350 | |
| dc.language.iso | en | en_US |
| dc.publisher | Oxford University Press | en_US |
| dc.subject | Cosmic background radiation | en_US |
| dc.subject | Cosmology: observations | en_US |
| dc.subject | Reionization | en_US |
| dc.subject | Cosmic microwave background (CMB) | en_US |
| dc.title | Cosmic microwave background constraints on a physical model of reionization | en_US |
| dc.type | Article | en_US |