Modified gravity and large scale flows

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

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.

Citation

Mould, J., Colless, M., Erdoğdu, P., Jones, H., Lucey, J., Ma, Y., …Springob, C. M. (2015). Modified gravity and large scale flows. Astrophysics and Space Science, 357(2), Article 162. https://doi.org/10.1007/s10509-015-2351-2

• Journal Article Type: Article
• Acceptance Date: Apr 11, 2015
• Online Publication Date: May 20, 2015
• Publication Date: 2015-06
• Deposit Date: Dec 22, 2015
• Publicly Available Date: May 20, 2016
• Journal: Astrophysics and Space Science
• Print ISSN: 0004-640X
• Electronic ISSN: 1572-946X
• Publisher: Springer
• Peer Reviewed: Peer Reviewed
• Volume: 357
• Issue: 2
• Article Number: 162
• DOI: https://doi.org/10.1007/s10509-015-2351-2
• Public URL: https://durham-repository.worktribe.com/output/1395955
• Related Public URLs: http://arxiv.org/abs/1504.03027