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Local Group Velocity from the PSCz and BTP Surveys

Published online by Cambridge University Press:  05 March 2013

Kenton J. D'Mellow ,
Will Saunders  and
PSCz/BTP Teams
Kenton J. D'Mellow
Affiliation:
Imperial College, Prince Consort Road, London, SW7 2AZ, UK
Will Saunders*
Affiliation:
Anglo-Australian Observatory, Epping NSW 1710, Australia
*
CCorresponding author. Email: will@aaoepp.aao.gov.au
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Abstract

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We present a brief overview and preliminary measure of the Local Group velocity, using the PSCz survey together with its recently completed extension into the Galactic plane, the Behind The Plane (BTP) survey. The addition of the BTP has increased the total sky coverage from 84% to 93%, drastically reducing the systematic uncertainty in the direction of the local gravitational pull caused by incomplete sky coverage. We present methods that self-consistently determine the acceleration in the presence of redshift distortions. Preliminary results suggest that the dipole converges within the survey limiting depth. There is a large, but only marginally significant, component to the dipole arising at 180–200 h–1 Mpc.

Keywords

cosmology: large-scale structuregalaxies: kinematics and dynamics
Type
Research Article
Information
Publications of the Astronomical Society of Australia , Volume 21 , Special Issue 4: Structure and Dynamics in the Local Universe , 2004 , pp. 415 - 417
Copyright
Copyright © Astronomical Society of Australia 2004

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