Baryon Acoustic Oscillations SUPPLEMENTARY SLIDES FOR arXiv'0910'5224

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Baryon Acoustic OscillationsSUPPLEMENTARY SLIDES
FORarXiv.0910.5224

• Bruce Bassett
• SAAO UCT
• Renée Hlozek
• University of Oxford

The use of these slides is welcomed, with credit,
in any non-profit talks or presentations
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The Beauty of Standard Volumes
Us
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Comparing BAO and Alcock-Paczynski (AP)
constraints
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Rings of Power Superposed
A single ring of galaxies at the characteristic
BAO radius, on a plane transverse to the line of
sight.
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Rings of Power Superposed
We now superpose random rings of galaxies, all
with the same BAO radius
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Rings of Power Superposed
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Rings of Power Superposed
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Rings of Power Superposed
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Rings of Power Superposed
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Rings of Power Superposed
Detecting the characteristic radius is now a
statistical problem
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Statistical Standard Rulers
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Power Spectrum Errors
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Illustrating Shot NoiseIdentifying the
underlying pattern
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Shot Noise
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Shot Noise
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Shot Noise
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Illustrating Cosmic Variance Identifying all the
modes
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Cosmic Variance
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Cosmic Variance
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Cosmic Variance
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BAO Nonlinearity
BAO ring is shifted inwards and broadened
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Broadening peak smoothes oscillations
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Nonlinear broadening makes the characteristic
BAO scale harder to detect