Modified gravity and large scale flows

Jeremy Mould*, Matthew Colless, Pirin Erdoğdu, Heath Jones, John Lucey, Yin-Zhe Ma, Christina Magoulas, Christopher M. Springob

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (Scopus)

Abstract

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
Article number162
Pages (from-to)1-5
Number of pages5
JournalAstrophysics and Space Science
Volume357
Issue number2
DOIs
Publication statusPublished - Jun 2015

Keywords

  • Surveys
  • Gravitation
  • Cosmology: distance scale
  • Cosmology: large-scale structure of Universe

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