Weak redshift discretisation in the Local Group of Galaxies?

Details Weak redshift discretisation in the Local Group of Galaxies? Weak redshift discretisation in the Local Group of Galaxies?

2005-11-09

arxiv.org/abs/astro-ph/0511260v1

Astron.Nachr.327:104,2006

Astronomy and Astrophysics

Astrophysics

23 pages 7 figures Astronomische Nachrichten accepted

Scientific paper

10.1002/asna.200510477

We discuss the distribution of radial velocities of galaxies belonging to the Local Group. Two independent samples of galaxies as well as several methods of reduction from the heliocentric to the galactocentric radial velocities are explored. We applied the power spectrum analysis using the Hann function as a weighting method, together with the jackknife error estimation. We performed a detailed analysis of this approach. The distribution of galaxy redshifts seems to be non-random. An excess of galaxies with radial velocities of $\sim 24 {km} \cdot {s}^{-1}$ and $\sim 36 {km} \cdot {s}^{-1}$ is detected, but the effect is statistically weak. Only one peak for radial velocities of $\sim 24 {km} \cdot {s}^{-1}$ seems to be confirmed at the confidence level of 95%.

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