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)


    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
    Issue number2
    Publication statusPublished - Jun 2015


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


    Dive into the research topics of 'Modified gravity and large scale flows'. Together they form a unique fingerprint.

    Cite this