Angular power spectrum of galaxies in the 2MASS Redshift Survey

Abstract We present the measurement and interpretation of the angular power spectrum of nearby galaxies in the 2MASS Redshift Survey catalogue with spectroscopic redshifts up to z ≈ 0.1. We detect the angular power spectrum up to a multipole of ℓ ≈ 1000. We find that the measured power spectrum is d...

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Bibliographic Details
Published in:Monthly notices of the Royal Astronomical Society 2018-02, Vol.473 (4), p.4318-4325
Main Authors: Ando, Shin'ichiro, Benoit-Lévy, Aurélien, Komatsu, Eiichiro
Format: Article
Language:English
Subjects:
Astrophysics
Galactic clusters
Galaxies
Galaxy distribution
Parameters
Physics
Red shift
Stars & galaxies
Thermal energy
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Summary:Abstract We present the measurement and interpretation of the angular power spectrum of nearby galaxies in the 2MASS Redshift Survey catalogue with spectroscopic redshifts up to z ≈ 0.1. We detect the angular power spectrum up to a multipole of ℓ ≈ 1000. We find that the measured power spectrum is dominated by galaxies living inside nearby galaxy clusters and groups. We use the halo occupation distribution (HOD) formalism to model the power spectrum, obtaining a fit with reasonable parameters. These HOD parameters are in agreement with the 2MASS galaxy distribution we measure towards the known nearby galaxy clusters, confirming validity of our analysis.
ISSN:0035-8711
1365-2966
DOI:10.1093/mnras/stx2634