Our CMB Motion: The Role of the Local Void

Details Our CMB Motion: The Role of the Local Void Our CMB Motion: The Role of the Local Void

2006-11-11

arxiv.org/abs/astro-ph/0611357v1

Astronomy and Astrophysics

Astrophysics

Conference proceedings, Cosmic Frontiers, Durham, UK, 31 July - 4 August, 2006, to be published in ASP Conference Series

Scientific paper

A database with a high density of accurate distances is used to investigate the contributions to the motion of our Galaxy. It is found that the motion of the Local Group separates remarkably cleanly into 3 components: a large-scale attraction toward structure in the `Great Attractor' sector, a mid-scale attraction toward the Virgo Cluster, and a local-scale `repulsion' from the Local Void. These 3 components cause motions of comparable amplitudes and, conveniently, are directed almost orthogonal to one another.

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