Modified gravity and large scale flows

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

doi:10.1007/s10509-015-2351-2

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 journal › Article › peer-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 language	English
Article number	162
Pages (from-to)	1-5
Number of pages	5
Journal	Astrophysics and Space Science
Volume	357
Issue number	2
DOIs	https://doi.org/10.1007/s10509-015-2351-2
Publication status	Published - Jun 2015

Keywords

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

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10.1007/s10509-015-2351-2

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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).",

keywords = "Surveys, Gravitation, Cosmology: distance scale, Cosmology: large-scale structure of Universe",

author = "Jeremy Mould and Matthew Colless and Pirin Erdoğdu and Heath Jones and John Lucey and Yin-Zhe Ma and Christina Magoulas and Springob, {Christopher M.}",

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AU - Mould, Jeremy

AU - Colless, Matthew

AU - Erdoğdu, Pirin

AU - Jones, Heath

AU - Lucey, John

AU - Ma, Yin-Zhe

AU - Magoulas, Christina

AU - Springob, Christopher M.

PY - 2015/6

Y1 - 2015/6

N2 - 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).

AB - 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).

KW - Surveys

KW - Gravitation

KW - Cosmology: distance scale

KW - Cosmology: large-scale structure of Universe

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SP - 1

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JO - Astrophysics and Space Science

JF - Astrophysics and Space Science

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ER -

Modified gravity and large scale flows

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