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Re-examination of Large Scale Structure & Cosmic Flows

Published online by Cambridge University Press:  12 October 2016

Marc Davis  and
Adi Nusser
Marc Davis
Affiliation:
Departments of Astronomy & Physics, University of California at Berkeley, CA 94720 email: mdavis@berkeley.edu
Adi Nusser
Affiliation:
Physics Department and the Asher Space Science Institute-Technion, Haifa 32000, Israel email: adi@physics.technion.ac.il
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Abstract

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Comparison of galaxy flows with those predicted from the local galaxy distribution ended as an active field after two analyses came to vastly different conclusions 25 years ago, but that was due to faulty data. All the old results are therefore suspect. With new data collected in the last several years, the problem deserves another look. The goal is to explain the 640 km/s dipole anisotropy of the CMBR. For this we analyze the gravity field inferred from the enormous data set derived from the 2MASS collection of galaxies (Huchra et al. 2005), and compare it to the velocity field derived from the well calibrated SFI++ Tully-Fisher catalog (Springob et al. 2007). Using the “Inverse Method” to minimize Malmquist biases, within 10,000 km/s the gravity field is seen to predict the velocity field (Davis et al. 2011) to remarkable consistency. This is a beautiful demonstration of linear perturbation theory and is fully consistent with standard values of the cosmological variables.

Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S308: The Zeldovich Universe: Genesis and Growth of the Cosmic Web , June 2014 , pp. 310 - 317
Copyright
Copyright © International Astronomical Union 2016 

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