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
The cosmic gravity-velocity relation. / Kudlicki, Andrzej; Chodorowski, Michal J.; Strauss, Michael A.; Cieciela̧g, Pawel.
In: Advances in Space Research, Vol. 31, No. 2, 2003, p. 469-474.Research output: Contribution to journal › Article
}
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 -