Work

X. Cosmological parameter constraints from HI intensity mapping lognormal simulations

Year: 2026

Type: article

Abstract: Context. Building on the transformative success of optical redshift surveys, the emerging technique of neutral hydrogen (HI) intensity mapping (IM) offers a novel probe of large-scale structure (LSS) growth and the late-time accelerated expansion of the Universe. Aims. We present cosmological forecasts for the Baryon acoustic oscillations from Integrated Neutral Gas Observations (BINGO) project, a pioneering HI IM experiment, quantifying its potential to constrain the Planck-calibrated lambda-cold dark matter (Lambda CDM) cosmology and extensions to the w(0)w(a)CDM dark energy model. Methods. For BINGO's phase 1 configuration, we simulated the HI IM signal using a lognormal model and incorporated three dominant systematics: foreground residuals, thermal noise, and beam resolution effects. Using Bayesian inference, we derived joint constraints on six cosmological parameters (Omega(b)h(2), Omega(c)h(2), 100 theta(s), n(s), ln10(10)A(s), and tau(r)) alongside 60 HI parameters (b(HI)(i), Omega(i)(HI)b(HI)(i)) across 30 frequency channels. Results. Our results demonstrate that combining BINGO with the Planck 2018 Cosmic Microwave Background (CMB) dataset tightens the confidence regions of cosmological parameters to similar to 40% the size of those from Planck alone, significantly improving the precision of parameter estimation. Furthermore, BINGO constrains the redshift evolution of HI density and delivers competitive measurements of the dark energy equation of state parameters (w(0), w(a)). Conclusions. These results demonstrate BINGO's potential to extract significant cosmological information from the HI distribution and provide constraints competitive with current and future cosmological surveys.

Source: Biblioteca Digital da Memória Científica do INPE (National Institute for Space Research)

Authors: Motta, Pablo, Abdalla, Filipe B., Novaes, Camila Paiva, Abdalla, Elcio, Zhang, Jiajun, Hoerning, Gabriel A., Marins, Alessandro, De Mericia, Eduardo Jubini, Ponte, Luiza O., Queiroz, Amilcar R., Villela Neto, Thyrso, Wang, Bin, Wuensche, Carlos Alexandre, Feng, Chang, Gurjao, Edmar C.

Institutions: Instituto Nacional de Pesquisas Espaciais, Shanghai Astronomical Observatory, Universidade de São Paulo, University of Manchester, University of Science and Technology of China, Universidade Federal de Campina Grande, Shanghai Jiao Tong University, Yangzhou University

Language: English

Topic: Cosmology and Gravitation Theories

Subfield: Astronomy and Astrophysics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: green

Funders: Fundação de Amparo à Pesquisa do Estado de São Paulo, Coordenação de Aperfeiçoamento de Pessoal de Nível Superior, Ministério da Ciência, Tecnologia e Inovação, Conselho Nacional de Desenvolvimento Científico e Tecnológico, Financiadora de Estudos e Projetos, Fundação de Apoio à Pesquisa do Estado da Paraíba, Agência Espacial Brasileira, University of Science and Technology of China, Instituto Serrapilheira

Awards: G121247717, G2951654077, G295657101, G3337620398, G5008956391, G5130850320, G6433806663, G6438247056, G6552784557, G6677345388, G8327822585

OpenAlex ID: W7149876794

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