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17 April 2024 |
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Article overview
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Modified Gravity and Large Scale Flows | Jeremy Mould
; Matthew Colless
; Tamara Davis
; Pirin Erdogdu
; Heath Jones
; John Lucey
; Yin-Zhe Ma
; Christina Magoulas
; Chris Springob
; | Date: |
12 Apr 2015 | 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. | Source: | arXiv, 1504.3027 | Services: | Forum | Review | PDF | Favorites |
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