Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Light and Motion in the Local Volume   Using high-quality data on 149 galaxies within 10 megaparsecs (Mpc), I find
no correlation between luminosity and peculiar velocity at all. There is no
unequivocal sign on scales of 1-2 Mpc of the expected gravitational effect of
the brightest galaxies, in particular infall toward groups; or of infall toward
the Supergalactic Plane on any scale. Either dark matter is not distributed in
the same way as luminous matter in this region, or peculiar velocities are not
due to fluctuations in mass. The sensitivity of peculiar velocity studies to
the background model is highlighted.

31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
0
The categories of this paper are: hep-ph
13
The categories of this paper are: quant-ph
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
32
The categories of this paper are: atom-ph
5
The categories of this paper are: gr-qc
12
The categories of this paper are: nucl-th
16
The categories of this paper are: stat
35
The categories of this paper are: mtrl-th
14
The categories of this paper are: math-ph
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
36
The categories of this paper are: cmp-lg