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Measuring baryon acoustic oscillations with future SKA surveys

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arxiv 1501.04088 v1 pith:6IU4RUE7 submitted 2015-01-16 astro-ph.CO

classification astro-ph.CO
keywords galaxymappingsurveysacousticbaryonexpansionfutureintensity
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The imprint of baryon acoustic oscillations (BAO) in large-scale structure can be used as a standard ruler for mapping out the cosmic expansion history, and hence for testing cosmological models. In this article we briefly describe the scientific background to the BAO technique, and forecast the potential of the Phase 1 and 2 SKA telescopes to perform BAO surveys using both galaxy catalogues and intensity mapping, assessing their competitiveness with current and future optical galaxy surveys. We find that a 25,000 sq. deg. intensity mapping survey on a Phase 1 array will preferentially constrain the radial BAO, providing a highly competitive 2% constraint on the expansion rate at z ~ 2. A 30,000 sq. deg. galaxy redshift survey on SKA2 will outperform all other planned experiments for z < 1.4.

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Cited by 2 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Detailed study of ELAIS N1 field with the uGMRT -- II. Source Properties and Spectral Variation Of Foreground Power Spectrum from 300-500 MHz Observations

    astro-ph.CO 2019-08 conditional novelty 6.0 of 10

    Using wide-band uGMRT data, the authors measure the frequency dependence of the diffuse Galactic synchrotron angular power spectrum in ELAIS N1, finding a power-law spectral index of 2.9 ± 0.21 that may break around 405 MHz.

  2. Improving cosmological parameter estimation with the future 21 cm observation from SKA

    astro-ph.CO 2019-08 conditional novelty 4.0 of 10

    Adding mock SKA 21 cm BAO data to current CMB, BAO, and supernova data would substantially tighten constraints on matter density, the Hubble constant, and dark energy equation of state parameters.

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