An expanded GNILC algorithm using a DCT along the frequency axis, a bias-corrected AIC for foreground degrees of freedom, and an RPCA-embedded blind variant recovers simulated 21-cm power spectra from SKA-MID and BINGO with roughly 10-20 percent bias in selected multipole ranges.
BINGO - A novel method to detect BAOs using a total-power radio telescope
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abstract
BINGO is a novel single-dish total-power telescope that will map the redshifted HI sky in a ~15 degree strip, at frequencies of 960-1260 MHz (z=0.12-0.48). BINGO will have the sensitivity to accurately measure the HI power spectrum and to detect Baryon Acoustic Oscillations (BAOs) for the first time at radio wavelengths. This will provide complementary cosmological information to existing surveys and will measure the acoustic scale to ~2 % precision. We provide an update on BINGO including an improved two-mirror optical configuration, final site selection and foreground removal simulations.
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2024 1verdicts
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Expanded Generalized Needlet Internal Linear Combination (eGNILC) Framework for the 21-cm Foreground Removal
An expanded GNILC algorithm using a DCT along the frequency axis, a bias-corrected AIC for foreground degrees of freedom, and an RPCA-embedded blind variant recovers simulated 21-cm power spectra from SKA-MID and BINGO with roughly 10-20 percent bias in selected multipole ranges.