Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Determination of Malmquist Bias and Selection Effects from Monte-Carlo
  Simulations   Maps of the peculiar velocity field derived from distance relations are
affected by Malmquist type bias and selection effects. Because of the large
number of interdependent effects, they are in most cases difficult to treat
analytically. Monte Carlo simulations are used to understand and evaluate these
effects. In these simulations the ``true'' spatial distribution and relevant
properties of galaxies as well as selection effects and observational
uncertainties are realistically modeled. The results of the simulation can
directly be applied to correct observed peculiar velocity maps. The simulation
is used to investigate biases in samples of measured peculiar velocities by
Lynden-Bell et al. (1988), Willick (1990) and the new sample of spiral galaxies
by Haynes et al. (1993). Based on the results obtained from the application of
our method to toy models we find that the method is a useful tool to estimate
the bias induced both by inhomogeneities and selection effects. This is a
crucial step for the analysis of the Haynes \etal sample which was selected
with a redshift dependent criterion.

20
The categories of this paper are: acc-phys
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
30
The categories of this paper are: q-alg
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
25
The categories of this paper are: patt-sol
31
The categories of this paper are: ao-sci
34
The categories of this paper are: chem-ph
19
The categories of this paper are: eess
3
The categories of this paper are: physics
27
The categories of this paper are: comp-gas
32
The categories of this paper are: atom-ph
11
The categories of this paper are: hep-lat
17
The categories of this paper are: q-fin
28
The categories of this paper are: alg-geom