Measuring baryon acoustic oscillations with future SKA surveys

Philip Bull; Stefano Camera; Alvise Raccanelli; Chris Blake; Pedro G. Ferreira; Mario G. Santos; Dominik J. Schwarz

Measuring baryon acoustic oscillations with future SKA surveys

Philip Bull, Stefano Camera, Alvise Raccanelli, Chris Blake, Pedro G. Ferreira, Mario G. Santos, Dominik J. Schwarz

Astronomy and Astrophysics Theory Group

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Abstract

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.

Original language	English
Journal	P o S - Proceedings of Science
Publication status	Published - 16 Jan 2015

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astro-ph.CO

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1501.04088v1

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title = "Measuring baryon acoustic oscillations with future SKA surveys",

abstract = " 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. ",

keywords = "astro-ph.CO",

author = "Philip Bull and Stefano Camera and Alvise Raccanelli and Chris Blake and Ferreira, {Pedro G.} and Santos, {Mario G.} and Schwarz, {Dominik J.}",

note = "16 pages, 4 figures. For the busy reader: see Fig. 3. Submitted on behalf of the SKA Cosmology Science working group, for the conference {"}Advancing Astrophysics with the SKA{"} (AASKA14), Giardini-Naxos, Italy, June 9th-13th 2014",

year = "2015",

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language = "English",

journal = "P o S - Proceedings of Science",

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TY - JOUR

T1 - Measuring baryon acoustic oscillations with future SKA surveys

AU - Bull, Philip

AU - Camera, Stefano

AU - Raccanelli, Alvise

AU - Blake, Chris

AU - Ferreira, Pedro G.

AU - Santos, Mario G.

AU - Schwarz, Dominik J.

N1 - 16 pages, 4 figures. For the busy reader: see Fig. 3. Submitted on behalf of the SKA Cosmology Science working group, for the conference "Advancing Astrophysics with the SKA" (AASKA14), Giardini-Naxos, Italy, June 9th-13th 2014

PY - 2015/1/16

Y1 - 2015/1/16

N2 - 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.

AB - 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.

KW - astro-ph.CO

M3 - Article

SN - 1824-8039

JO - P o S - Proceedings of Science

JF - P o S - Proceedings of Science

ER -

Measuring baryon acoustic oscillations with future SKA surveys

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