Imperial College London
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ProfessorAlanHeavens

Faculty of Natural Sciences, Department of Physics

Chair in Astrostatistics
 
 
 
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Contact

 

+44 (0)20 7594 2930a.heavens Website

 
 
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Location

 

1018EBlackett LaboratorySouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Verde:2017:mnras/stx116,
author = {Verde, L and Luis, Bernal J and Heavens, AF and Jimenez, R},
doi = {mnras/stx116},
journal = {MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY},
pages = {731--736},
title = {The length of the low-redshift standard ruler},
url = {http://dx.doi.org/10.1093/mnras/stx116},
volume = {467},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Assuming the existence of standard rulers, standard candles and standard clocks, requiring only the cosmological principle, a metric theory of gravity, a smooth expansion history and using state-of-the-art observations, we determine the length of the ‘low-redshift standard ruler’. The data we use are a compilation of recent baryon acoustic oscillation data (relying on the standard ruler), Type Ia supernovae (as standard candles), ages of early-type galaxies (as standard clocks) and local determinations of the Hubble constant (as a local anchor of the cosmic distance scale). In a standard Λ cold dark matter cosmology, the ‘low-redshift standard ruler’ coincides with the sound horizon at radiation drag, which can also be determined – in a model dependent way – from cosmic microwave background observations. However, in general, the two quantities need not coincide. We obtain constraints on the length of the low-redshift standard ruler: rhs=101.0±2.3h−1rsh=101.0±2.3h−1  Mpc, when using only Type Ia supernovae and baryon acoustic oscillations, and rs = 150.0 ± 4.7 Mpc when using clocks to set the Hubble normalization, while rs = 141.0 ± 5.5 Mpc when using the local Hubble constant determination (using both yields rs = 143.9 ± 3.1 Mpc). The low-redshift determination of the standard ruler has an error, which is competitive with the model-dependent determination from cosmic microwave background measurements made with the Planck satellite, which assumes that it is the sound horizon at the end of baryon drag.
AU  - Verde,L
AU  - Luis,Bernal J
AU  - Heavens,AF
AU  - Jimenez,R
DO  - mnras/stx116
EP  - 736
PY  - 2017///
SN  - 0035-8711
SP  - 731
TI  - The length of the low-redshift standard ruler
T2  - MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
UR  - http://dx.doi.org/10.1093/mnras/stx116
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000398418900049&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/48739
VL  - 467
ER  -
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