MG14 - Talk detail |
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Participant |
Roukema, Boudewijn F. | |||||||
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Institution |
Torun Centre for Astronomy, Nicolaus Copernicus University - ul. Gagarina 11 - Torun - - Poland | |||||||
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Session |
DE3 |
Accepted |
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Order |
Time |
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Talk |
Oral abstract |
Title |
The baryon acoustic oscillation peak: a flexible standard ruler | |||||
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Abstract |
The baryon acoustic oscillation (BAO) peak at about 105 Mpc/h has provided a test of the LambdaCDM standard cosmological model - according to which comoving space is rigid - for about a decade. The BAO peak has been especially useful as a standard ruler for measuring the parameters of the cosmological metric in the context of the same (Friedmann-Lemaitre-Robertson-Walker) family of cosmological models. However, general relativity does not require comoving space to be rigid. During the virialisation epoch during which the most massive structures form by gravitational collapse, it should be expected that comoving space evolves along with structure growth. The BAO peak standard ruler should also follow this evolution if the comoving rigidity assumption is false. The first observational detection of the flexibility of this "ruler" will be presented. |
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Pdf file |
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