J/A+A/542/A34 Baryon Acoustic Oscillations in LRGs (Arnalte-Mur+, 2012)
Wavelet analysis of baryon acoustic structures in the galaxy distribution.
Arnalte-Mur P., Labatie A., Clerc N., Martinez V.J., Starck J.-L.,
Lachieze-Rey M., Saar E., Paredes S.
<Astron. Astrophys. 542, A34 (2012)>
=2012A&A...542A..34A 2012A&A...542A..34A
ADC_Keywords: Galaxy catalogs ; Redshifts
Keywords: large-scale structure of Universe - distance scale -
galaxies: cluster: general - methods: data analysis -
methods: statistical
Abstract:
Baryon Acoustic Oscillations (BAO) have been previously detected using
correlation functions and power spectra of the galaxy distribution. In
this work, we present a new method for the detection of the real-space
structures associated with this feature. These baryon acoustic
structures are spherical shells with a relatively small density
contrast, surrounding high density central regions.
We design a specific wavelet adapted to the search for shells, and
exploit the physics of the process by making use of two different mass
tracers, introducing a specific statistic to detect the BAO features.
We apply our method to the detection of BAO in a galaxy sample drawn
from the Sloan Digital Sky Survey (SDSS). We use the 'Main' catalogue
to trace the shells, and the Luminous Red Galaxies (LRG) as tracers of
the high density central regions.
Description:
We present the data for the LRG sample used, including the value of
Wmax. Wmax is the value of the wavelet coefficient of the
transformation for the values of the parameters R (radius) and s
(width) that give the maximum of the global statistic B(R,s). In this
way, the values Wmax are a measure of how strong is the signal coming
from a BAO shell around a given LRG.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 68 1599 Basic characteristics and Wmax for the sample
of Luminous Red Galaxies (LRG) used
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See also:
J/MNRAS/372/425 : 2dF-SDSS Luminous Red Galaxy Survey, 2SLAQ (Cannon+, 2006)
J/MNRAS/375/68 : MegaZ-LRG catalogue (Collister+, 2007)
J/MNRAS/377/787 : SDSS Luminous Red Galaxies (Barber+, 2007)
J/MNRAS/380/1608 : LRG catalog (Lopes+, 2007)
J/MNRAS/387/1323 : SDSS photometry of luminous red galaxies (Ross+, 2008)
http://www.sdss.org : SDSS Home Page
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- --- [SDSS_]
6- 24 A19 --- SDSS SDSS object name (JHHMMSS.ss+DDMMSS.s)
26- 34 F9.5 deg RAdeg Right ascension in decimal degrees (J2000)
36- 44 F9.5 deg DEdeg Declination in decimal degrees (J2000)
46- 52 F7.5 --- z Redshift (from SDSS)
54- 60 F7.5 --- e_z Redshift uncertainty
62- 68 F7.2 --- Wmax Value of Wmax coefficient (1)
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Note (1): Wmax=WRmax,Smax is a measure of the strength of the signal
coming from a Baryon Acoustic Oscillations (BAO) shell around a given
point, and in particular, a given LRG. Therefore, using Wmax we can
localise in configuration space the regions of the volume covered by
our samples where the BAO signal mostly originates.
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Acknowledgements:
Pablo Arnalte-Mur, pablo.arnalte-mur(at)durham.ac.uk
(End) Pablo Arnalte-Mur [Durham Univ., UK], Patricia Vannier [CDS] 03-May-2012