Skewness of the Large-Scale Velocity Divergence from Non-Gaussian Initial Conditions

Details Skewness of the Large-Scale Velocity Divergence from Non-Gaussian Initial Conditions Skewness of the Large-Scale Velocity Divergence from Non-Gaussian Initial Conditions

1996-09-11

arxiv.org/abs/astro-ph/9609084v1

Mon.Not.Roy.Astron.Soc. 286 (1997) 233

Astronomy and Astrophysics

Astrophysics

13 pages, latex, no figures

Scientific paper

We compute the skewness $t_3$ and the corresponding hierarchical amplitude $T_3$ of the divergence of the velocity field for arbitrary non-Gaussian initial conditions. We find that $T_3$ qualitatively resembles the corresponding hierarchical amplitude for the density field, $S_3$, in that it contains a term proportional to the initial skewness, which decays inversely as the linear growth factor, plus a constant term which differs from the corresponding Gaussian term by a complex function of the initial three- and four- point functions. We extend the results for $S_3$ and $T_3$ with non-Gaussian initial conditions to evolved fields smoothed with a spherical tophat window function. We show that certain linear combinations, namely $S_3 + {1 \over 2} T_3$, $S_3 + T_3$, and $s_3 + t_3$, lead to expressions which are much simpler, for non-Gaussian initial conditions, than $S_3$ and $T_3$ (or $s_3$ and $t_3$) considered separately.

Affiliated with

Also associated with

No associations

Rating

Skewness of the Large-Scale Velocity Divergence from Non-Gaussian Initial Conditions does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Skewness of the Large-Scale Velocity Divergence from Non-Gaussian Initial Conditions, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Skewness of the Large-Scale Velocity Divergence from Non-Gaussian Initial Conditions will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-228136