### Abstract

We present a numerical study of the relation between the cosmic peculiar velocity field and the gravitational acceleration field. We show that on mildly non-linear scales (3-10 Mpc Gaussian smoothing), the distribution of the Cartesian coordinates of each of these fields is very well approximated by a Gaussian. In particular, their negentropies are small compared to those of the velocity divergence and density fields. We find that at these scales the relation between the velocity and acceleration fields follows linear theory to high accuracy. The non-linear correction of Kudlicki et al. (2000a) works still better: its reconstruction errors are several times smaller than those of the linear theory approximation.

Original language | English (US) |
---|---|

Pages (from-to) | 469-474 |

Number of pages | 6 |

Journal | Advances in Space Research |

Volume | 31 |

Issue number | 2 |

DOIs | |

State | Published - 2003 |

Externally published | Yes |

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### ASJC Scopus subject areas

- Space and Planetary Science
- Astronomy and Astrophysics

### Cite this

*Advances in Space Research*,

*31*(2), 469-474. https://doi.org/10.1016/S0273-1177(02)00734-2

**The cosmic gravity-velocity relation.** / Kudlicki, Andrzej; Chodorowski, Michal J.; Strauss, Michael A.; Cieciela̧g, Pawel.

Research output: Contribution to journal › Article

*Advances in Space Research*, vol. 31, no. 2, pp. 469-474. https://doi.org/10.1016/S0273-1177(02)00734-2

}

TY - JOUR

T1 - The cosmic gravity-velocity relation

AU - Kudlicki, Andrzej

AU - Chodorowski, Michal J.

AU - Strauss, Michael A.

AU - Cieciela̧g, Pawel

PY - 2003

Y1 - 2003

N2 - We present a numerical study of the relation between the cosmic peculiar velocity field and the gravitational acceleration field. We show that on mildly non-linear scales (3-10 Mpc Gaussian smoothing), the distribution of the Cartesian coordinates of each of these fields is very well approximated by a Gaussian. In particular, their negentropies are small compared to those of the velocity divergence and density fields. We find that at these scales the relation between the velocity and acceleration fields follows linear theory to high accuracy. The non-linear correction of Kudlicki et al. (2000a) works still better: its reconstruction errors are several times smaller than those of the linear theory approximation.

AB - We present a numerical study of the relation between the cosmic peculiar velocity field and the gravitational acceleration field. We show that on mildly non-linear scales (3-10 Mpc Gaussian smoothing), the distribution of the Cartesian coordinates of each of these fields is very well approximated by a Gaussian. In particular, their negentropies are small compared to those of the velocity divergence and density fields. We find that at these scales the relation between the velocity and acceleration fields follows linear theory to high accuracy. The non-linear correction of Kudlicki et al. (2000a) works still better: its reconstruction errors are several times smaller than those of the linear theory approximation.

UR - http://www.scopus.com/inward/record.url?scp=0037221420&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0037221420&partnerID=8YFLogxK

U2 - 10.1016/S0273-1177(02)00734-2

DO - 10.1016/S0273-1177(02)00734-2

M3 - Article

VL - 31

SP - 469

EP - 474

JO - Advances in Space Research

JF - Advances in Space Research

SN - 0273-1177

IS - 2

ER -