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Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2022

The BINGO project VIII: On the recoverability of the BAO signal on HI intensity mapping simulations

Camila Paiva Novaes
  • Fonction : Auteur
Jiajun Zhang
  • Fonction : Auteur
Eduardo J. de Mericia
  • Fonction : Auteur
Filipe B. Abdalla
  • Fonction : Auteur
Vincenzo Liccardo
  • Fonction : Auteur
Carlos A. Wuensche
  • Fonction : Auteur
Mathieu Remazeilles
  • Fonction : Auteur
Larissa Santos
  • Fonction : Auteur
Ricardo G. Landim
  • Fonction : Auteur
Elcio Abdalla
  • Fonction : Auteur
Luciano Barosi
  • Fonction : Auteur
Amilcar Queiroz
  • Fonction : Auteur
Thyrso Villela
  • Fonction : Auteur
Bin Wang
  • Fonction : Auteur
Francisco A. Brito
  • Fonction : Auteur
André A. Costa
  • Fonction : Auteur
Elisa G.M. Ferreira
  • Fonction : Auteur
Alessandro Marins
  • Fonction : Auteur
Marcelo V. dos Santos
  • Fonction : Auteur

Résumé

A new and promising technique for observing the Universe and study the dark sector is the intensity mapping of the redshifted 21cm line of neutral hydrogen (HI). The BINGO radio telescope will use the 21cm line to map the Universe in the redshift range $0.127 \le z \le 0.449$, in a tomographic approach, with the main goal of probing BAO. This work presents the forecasts of measuring the transversal BAO signal during the BINGO Phase 1 operation. We use two clustering estimators, the two-point angular correlation function (ACF) and the angular power spectrum (APS), and a template-based method to model the ACF and APS estimated from simulations of the BINGO region and extract the BAO information. The tomographic approach allows the combination of redshift bins to improve the template fitting performance. We find that each clustering estimator shows different sensitivities to specific redshift ranges, although both of them perform better at higher redshifts. In general, the APS estimator provides slightly better estimates, with smaller uncertainties and larger probability of detection of the BAO signal, achieving $\gtrsim 90$% at higher redshifts. We investigate the contribution from instrumental noise and residual foreground signals and find that the former has the greater impact, getting more significant as the redshift increases, in particular the APS estimator. Indeed, including noise in the analysis increases the uncertainty up to a factor of $\sim 2.2$ at higher redshifts. Foreground residuals, in contrast, do not significantly affect our final uncertainties. In summary, our results show that, even including semi-realistic systematic effects, BINGO has the potential to successfully measure the BAO scale in radio frequencies. (Abridged)

Dates et versions

hal-03761656 , version 1 (26-08-2022)

Identifiants

Citer

Camila Paiva Novaes, Jiajun Zhang, Eduardo J. de Mericia, Filipe B. Abdalla, Vincenzo Liccardo, et al.. The BINGO project VIII: On the recoverability of the BAO signal on HI intensity mapping simulations. Astronomy and Astrophysics - A&A, 2022, 666, pp.A83. ⟨10.1051/0004-6361/202243158⟩. ⟨hal-03761656⟩
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