On the Prospects of Measuring the Cosmic Dawn 21-cm Power Spectrum using the Upgraded Giant Meterwave Radio Telescope (uGMRT)

Abstract

A recent observation by the EDGES collaboration shows a strong absorption signal in the global 21-cm spectrum from around a redshift of $z=17$. This absorption is stronger than the maximum prediction by existing models and indicates that the spatial fluctuations of the \HI 21-cm brightness temperature at Cosmic Dawn could be an order of magnitude larger than previously expected. In this paper, we investigate the prospects of detecting the \HI 21-cm power spectrum from Cosmic Dawn using uGMRT. We find that a $10\sigma$ detection of the enhanced \HI 21-cm signal power spectrum is possible within $70,140$ and $400$ Hours of observation for an optimistic, moderate and pessimistic scenario respectively, using the Band-1 of uGMRT. This could be an useful probe of the interaction between the baryon and dark matter particles in the early Universe. We also present a comparison of the uGMRT predictions with those for the future SKA-Low.

arXiv commentAccepted for publication in MNRAS

References in corpus (20)

• An absorption profile centred at 78 megahertz in the sky-averaged spectrum
• Possible interaction between baryons and dark-matter particles revealed by the first stars
• Bright Source Subtraction Requirements For Redshifted 21 cm Measurements
• What Next-Generation 21 cm Power Spectrum Measurements Can Teach Us About the Epoch of Reionization
• A Per-Baseline, Delay-Spectrum Technique for Accessing the 21cm Cosmic Reionization Signature
• Four Fundamental Foreground Power Spectrum Shapes for 21 cm Cosmology Observations
• Constraining Dark Matter-Baryon Scattering with Linear Cosmology
• Insights on Dark Matter from Hydrogen during Cosmic Dawn
• Modeling the Radio Background from the First Black Holes at Cosmic Dawn: Implications for the 21 cm Absorption Amplitude
• Charting the Parameter Space of the Global 21-cm Signal
• Probing sub-GeV Dark Matter-Baryon Scattering with Cosmological Observables
• Constraining Baryon--Dark Matter Scattering with the Cosmic Dawn 21-cm Signal
• Fast Large Volume Simulations of the 21 cm Signal from the Reionization and pre-Reionization Epochs
• Heating of Baryons due to Scattering with Dark Matter During the Dark Ages
• Bayesian constraints on the global 21-cm signal from the Cosmic Dawn
• Foregrounds for redshifted 21 cm studies of reionization: GMRT 153 MHz observations
• The Effects of Dark Matter-Baryon Scattering on Redshifted 21 cm Signals
• 21-cm Fluctuations from Charged Dark Matter
• Visibility based angular power spectrum estimation in low frequency radio interferometric observations
• Probing Radio Intensity at high-Z from Marion: 2017 Instrument

Cited by in corpus (7)

• A 21-cm power spectrum at 48 MHz, using the Owens Valley Long Wavelength Array
• The impact of non-Gaussianity on the error covariance for observations of the Epoch of Reionization 21-cm power spectrum
• Predictions for measuring the 21-cm multi-frequency angular power spectrum using SKA-Low
• The impact of non-Gaussianity on the Epoch of Reionization parameter forecast using 21-cm power spectrum measurements
• Constraints on Dark Matter-Neutrino Interaction from 21-cm Cosmology and Forecasts on SKA1-Low
• Calibration Requirements for Epoch of Reionization 21-cm signal observations -- I. Effect of time-correlated gains
• Simulated Predictions for HI at $z=3.35$ with the Ooty Wide Field Array (OWFA) -- II: Foreground Avoidance