Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Triplets of Galaxies in the Local Supercluster. I. Kinematic and Virial
  Parameters   We considered kinematic and virial parameters of a sample of galaxy triplets
from the Local Supercluster (LS). The galaxies were selected from the LEDA
database, and their radial velocities are no more than 3100 km/s. The sample
contains 176 systems selected according to the Karachentsev criterion. We
calculated the following median parameters of the LS triplets: rms velocity of
galaxies with respect to triplet center, Sv=30 km/s; harmonic mean radius,
Rh=160 kpc; virial mass Mvir=3.6x10^11 Msun; and mass-to-light ratio, Mvir/L=35
Msun/Lsun. Although various investigators used different approaches to compile
samples of triple systems, general properties of the triplets in all the
samples we considered agree rather satisfactorily. The LS triplets have the
least mass-to-light ratio as compared to other galaxy triplet samples.

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The categories of this paper are: mtrl-th
22
The categories of this paper are: chao-dyn
7
The categories of this paper are: hep-th
19
The categories of this paper are: eess
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The categories of this paper are: solv-int
8
The categories of this paper are: hep-ex
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The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
13
The categories of this paper are: quant-ph
5
The categories of this paper are: gr-qc
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The categories of this paper are: q-fin
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The categories of this paper are: supr-con
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The categories of this paper are: alg-geom
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The categories of this paper are: acc-phys
3
The categories of this paper are: physics
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The categories of this paper are: ao-sci