[1004.2244] Regarding the Line-of-Sight Baryonic Acoustic F
Posted: April 19 2010
This paper has more on the claimed measurement of the radial baryon acoustic oscillation signal mentioned at http://cosmocoffee.info/viewtopic.php?t=1301&highlight=.
The authors independently redo the analysis of Gaztanaga, Cabre and Hui, and obtain basically the same results as far as the data is concerned. However, they argue that the detection of the radial mode is not statistically significant, and discuss expected improvement from future surveys.
In particular, they claim that the model with the oscillation signal does not provide a fit to the data that would be decisively better than a completely featureless spectrum (their table 2 on the last page). This seems straightforward.
As for predictions for future surveys, I wonder about using [tex]\Lambda[/tex]CDM simulations to set error bars, given that the large-scale statistical properties of the observed distribution are different from those in simulations: http://cosmocoffee.info/viewtopic.php?t=1543&highlight= - see also 0903.0950.
The authors independently redo the analysis of Gaztanaga, Cabre and Hui, and obtain basically the same results as far as the data is concerned. However, they argue that the detection of the radial mode is not statistically significant, and discuss expected improvement from future surveys.
In particular, they claim that the model with the oscillation signal does not provide a fit to the data that would be decisively better than a completely featureless spectrum (their table 2 on the last page). This seems straightforward.
As for predictions for future surveys, I wonder about using [tex]\Lambda[/tex]CDM simulations to set error bars, given that the large-scale statistical properties of the observed distribution are different from those in simulations: http://cosmocoffee.info/viewtopic.php?t=1543&highlight= - see also 0903.0950.