# Angular power spectrum of galaxies in the 2MASS Redshift Survey

## TL;DR

This paper measures the angular power spectrum of nearby galaxies in the 2MASS survey, analyzes its features, and models it using the halo occupation distribution to understand galaxy clustering in the local universe.

## Contribution

It provides the first detailed measurement of the angular power spectrum for 2MASS galaxies and applies HOD modeling to interpret galaxy clustering at low redshift.

## Key findings

- Power spectrum detected up to multipole ℓ≈1000.
- Clustering dominated by galaxies in nearby clusters and groups.
- HOD model fits well with observed galaxy distribution.

## Abstract

We present the measurement and interpretation of the angular power spectrum of nearby galaxies in the 2MASS Redshift Survey catalog with spectroscopic redshifts up to $z\approx 0.1$. We detect the angular power spectrum up to a multipole of $\ell\approx 1000$. 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 toward the known nearby galaxy clusters, confirming validity of our analysis.