Modified gravity and large scale flows

J. Mould, M. Colless, P. Erdoğdu, H. Jones, J. Lucey, Y.Z. Ma, C. Magoulas, Chris Springob

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

© 2015, Springer Science+Business Media Dordrecht. Reconstruction of the local velocity field from the overdensity field and a gravitational acceleration that falls off from a point mass as r−2 yields velocities in broad agreement with peculiar velocities measured with galaxy distance indicators. MONDian gravity does not. To quantify this, we introduce the velocity angular correlation function as a diagnostic of peculiar velocity field alignment and coherence as a function of scale. It is independent of the bias parameter of structure formation in the standard model of cosmology and the acceleration parameter of MOND. A modified gravity acceleration consistent with observed large scale structure would need to asymptote to zero at large distances more like r−2, than r−1.
Original languageEnglish
JournalAstrophysics and Space Science
Volume357
Issue number2
Early online date20 May 2015
DOIs
Publication statusPublished - Jun 2015

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