Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Large Scale Power Spectrum from Peculiar Velocities Via Likelihood
  Analysis   The power spectrum (PS) of {\it mass} density fluctuations, independent of
``biasing", is estimated from the Mark3 Catalog of Peculiar Velocities of
galaxies using Bayesian statistics. A parametric model is assumed for the PS,
and the free parameters are determined by maximizing the posterior probability
of the model given the data. The method has been tested using detailed mock
catalogs. We use generalized CDM models with and without COBE normalization.
  The robust result for all the models tested is $P(k) \Omega^{1.2} = (4.1 \pm
0.7)x10^3 (Mpc h^{-1})^3$ at $k=0.1 h Mpc^{-1}$, with the peak constrained to
the range $0.03 < k < 0.06 h Mpc^{-1}$. It is consistent with a direct
computation of the PS (Kolatt \& Dekel 1996). When compared to galaxy-density
surveys, the implied values for $\beta$ ($\equiv \Omega^{0.6}/b$) are of order
unity to within 25\%.
  A $\Gamma$-shape model, free of COBE normalization, is constrained by the
velocity data to $\Gamma=0.5\pm 0.15$ and $\sigma_8 \Omega^{0.6}=0.85\pm 0.1$.
Within the family of COBE-normalized CDM models, the best tilted model
($\Omega=1$, $n \approx 0.84 h_{50}^{-0.65}$) and the best open model ($n=1$,
$\Omega \approx 0.75 h_{50}^{-1.0}$) are more likely than the best $\Lambda$
model ($n=1$, $\Lambda=1-\Omega$, $\Omega\approx 0.70 h_{50}^{-1.2}$). The most
likely CDM model with $\Omega\leq 1$ is found to be of $\Omega=1$, $h\approx
0.75$, and a {\it tilted} spectrum of $n= 0.8\pm 0.02$ with tensor
fluctuations.The tightest constraint for the tilted-$\Lambda$ models is of the
sort $\Omega h_{50}^{1.2} n^\nu = 0.7 \pm 0.08$, with $\nu=3.8$ and $1.85$ with
and without tensor fluctuations respectively.

36
The categories of this paper are: cmp-lg
23
The categories of this paper are: solv-int
31
The categories of this paper are: ao-sci
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
15
The categories of this paper are: nucl-ex
4
The categories of this paper are: cond-mat
12
The categories of this paper are: nucl-th
24
The categories of this paper are: dg-ga
18
The categories of this paper are: econ
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
3
The categories of this paper are: physics
25
The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg