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Large-scale velocity flow in the Horologium-Reticulum supercluster

Published online by Cambridge University Press:  06 October 2004

Matthew C. Fleenor ,
James A. Rose ,
Wayne A. Christiansen ,
Richard W. Hunstead ,
Melanie Johnston-Hollitt  and
Michael J. Drinkwater
Matthew C. Fleenor
Affiliation:
Department of Physics & Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 USA email: fleenor2@physics.unc.edu
James A. Rose
Affiliation:
Department of Physics & Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 USA email: fleenor2@physics.unc.edu
Wayne A. Christiansen
Affiliation:
Department of Physics & Astronomy, University of North Carolina, Chapel Hill, North Carolina 27599-3255 USA email: fleenor2@physics.unc.edu
Richard W. Hunstead
Affiliation:
School of Physics, University of Sydney, NSW 2006, Australia
Melanie Johnston-Hollitt
Affiliation:
Leiden Observatory, NL-2300 RA Leiden, The Netherlands
Michael J. Drinkwater
Affiliation:
Department of Physics, University of Queensland, QLD 4072, Australia
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Abstract

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We present results from 547 optical galaxy redshifts obtained in the region of Horologium-Reticulum (HR) using the 6dF (six-degree field) multi-fiber spectrograph on the United Kingdom Schmidt Telescope. Concentrating upon the inter-cluster regions of the HR Supercluster (HRS), we derive three primary results from our 6dF observations. First, the HRS covers a redshift range from at least 16000 to 22500 kms−1. Second, these HRS galaxies exhibit an overall gradient with increasing redshift along a spatial axis of SE-NW with high statistical probability. Third, along the best-fit line from the spatial-redshift linear regression, HRS galaxies comprising the redshift trend are distinctly split into a high- and low-redshift component. Finally, comparisons of the spatial-redshift distribution are made between the HRS and the Shapley supercluster.To search for other articles by the author(s) go to: http://adsabs.harvard.edu/abstract_service.html

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 2004 , Issue IAUC195 , March 2004 , pp. 89 - 91
Copyright
© 2004 International Astronomical Union