Yet another sample of RFGC galaxies

TL;DR

This paper updates the RFGC galaxy sample with redshift and HI data, analyzes collective motion models including dipole, quadrupole, and octupole, and finds consistency with CDM cosmology.

Contribution

Provides an updated galaxy sample with motion parameters, incorporating higher-order multipoles, confirming compatibility with CDM cosmology.

Findings

Motion parameters match CDM predictions

Includes higher-order multipole analysis

Sample update with redshift and HI data

Abstract

We present a new version of a sample of galaxies from the Revised Flat Galaxy Catalogue (RFGC), which have redshift and HI line width data. We also give the parameters of the collective motion model determined upon this sample. The considered models of motion include the dipole (bulk flow), the quadrupole (cosmic shear) and the octupole components. We also considered higher-order multipoles. In all cases the obtained parameters matched the {\Lambda}CDM cosmology.