Impact of $1/f$ noise on cosmological parameter constraints for SKA intensity mapping

Abstract

We investigate the impact of $1/f$ noise on cosmology for an intensity mapping survey with SKA1-MID Band\,1 and Band\,2. We use a Fisher matrix approach to forecast constraints on cosmological parameters under the influence of $1/f$ noise, adopting a semi-empirical model from an earlier work, which results from the residual $1/f$ noise spectrum after applying a component separation algorithm to remove smooth spectral components. Without $1/f$ noise, the projected constraints are $4\%$ on $w_0$, $1\%$ on $h$, $2\%$ on $b_{\mathrm{HI}}$ using Band\,1+\emph{Planck}, and $3\%$ on $w_0$, $0.5\%$ on $h$, $2\%$ on $b_{\mathrm{HI}}$ using Band\,2+\emph{Planck}. A representative baseline $1/f$ noise degrades these constraints by a factor of $\sim 1.5$ for Band\,1+\emph{Planck}, and $\sim 1.2$ for Band\,2+\emph{Planck}. On the power spectrum measurement, higher redshift and smaller scales are more affected by $1/f$ noise, with minimal contamination comes from $z\lesssim 1$ and $\ell \lesssim 100$. Subject to the specific scan strategy of the adopted $1/f$ noise model, one prefers a correlated in frequency with minimised spectral slope, a low knee frequency, and a large telescope slew speed in order to reduce its impact.

arXiv comment15 pages, 8 figures, submitted to MNRAS

References in corpus (42)

• Cosmological parameters from CMB and other data: a Monte-Carlo approach
• LOFAR: The LOw-Frequency ARray
• Exploring the Expansion History of the Universe
• Accelerating Universes with Scaling Dark Matter
• The clustering of galaxies in the SDSS-III Baryon Oscillation Spectroscopic Survey: Baryon Acoustic Oscillations in the Data Release 10 and 11 galaxy samples
• Observational Probes of Cosmic Acceleration
• The Five-Hundred-Meter Aperture Spherical Radio Telescope (FAST) Project
• 21-cm Tomography of the Intergalactic Medium at High Redshift
• Planck 2015 results. XI. CMB power spectra, likelihoods, and robustness of parameters
• Hydrogen Epoch of Reionization Array (HERA)
• CMB power spectrum parameter degeneracies in the era of precision cosmology
• The linear power spectrum of observed source number counts
• What galaxy surveys really measure
• The Precision Array for Probing the Epoch of Reionization: 8 Station Results
• Measurement of 21 cm brightness fluctuations at z ~ 0.8 in cross-correlation
• Late-time cosmology with 21cm intensity mapping experiments
• Science with the Murchison Widefield Array
• Linear Redshift Distortions: A Review
• Upper limits on the 21-cm Epoch of Reionization power spectrum from one night with LOFAR
• Determination of z~0.8 neutral hydrogen fluctuations using the 21 cm intensity mapping auto-correlation
• Observational Tests of Modified Gravity
• HI intensity mapping : a single dish approach
• Line-Intensity Mapping: 2017 Status Report
• The Tianlai project: a 21cm cosmology experiment
• Blind foreground subtraction for intensity mapping experiments
• Neutral hydrogen surveys for high redshift galaxy clusters and proto-clusters
• The effect of foreground subtraction on cosmological measurements from Intensity Mapping
• Recovering 3D clustering information with angular correlations
• Extending cosmological tests of General Relativity with the Square Kilometre Array
• 1/f noise and other systematic effects in the Planck-LFI radiometers
• The Radio Sky at Meter Wavelengths: m-Mode Analysis Imaging with the Owens Valley Long Wavelength Array
• Simulations for single-dish intensity mapping experiments
• Extracting HI cosmological signal with Generalized Needlet Internal Linear Combination
• Making sky maps from Planck data
• Fisher Matrices and Confidence Ellipses: A Quick-Start Guide and Software
• Theoretical and observational constraints on the HI intensity power spectrum
• Probing the neutrino mass hierarchy with CMB weak lensing
• Modelling the post-reionization neutral Hydrogen (\HI) bias
• Impact of Simulated 1/f Noise for HI Intensity Mapping Experiments
• Cosmological parameter forecasts for HI intensity mapping experiments using the angular power spectrum
• A Fast Route to Modified Gravitational Growth
• Potential Impact of Global Navigation Satellite Services on Total Power HI Intensity Mapping Surveys

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• Forecasts on Interacting Dark Energy from 21-cm Angular Power Spectrum with BINGO and SKA observations
• Detecting the signature of helium reionization through 3HeII 3.46cm line-intensity mapping