Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Distance and Peculiar Velocity of the Norma cluster (ACO 3627) using
  the Near-Infrared $J$ and $K_s$-band Fundamental Plane Relations   We report distance measurements for the Norma cluster based on the
near-infrared $J$- and $K_s$-band Fundamental Plane (FP) relations. Our
simultaneous $J$ and $K_s$-band photometry analyses were performed using 31
early-type galaxies in the nearby Norma cluster obtained using the 1.4 m
InfraRed Survey Facility (IRSF) at the South African Astronomical Observatory.
Our final $K_s$-band FP sample consists of 41 early-type galaxies from the
Norma cluster observed using the IRSF and the New Technology Telescope (NTT) at
the European Southern Observatory. This is the largest cluster sample used for
peculiar velocity studies in the Great Attractor region to date. From the
$K_s$-band FP, we find a distance to the Norma cluster of $4915 \pm 121$ km
s$^{-1}$. The implied peculiar velocity for Norma is $44 \pm 151$ km s$^{-1}$
which further supports a small peculiar velocity for the Norma cluster.

16
The categories of this paper are: stat
5
The categories of this paper are: gr-qc
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
8
The categories of this paper are: hep-ex
29
The categories of this paper are: funct-an
13
The categories of this paper are: quant-ph
3
The categories of this paper are: physics
0
The categories of this paper are: hep-ph
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
33
The categories of this paper are: plasm-ph
31
The categories of this paper are: ao-sci
20
The categories of this paper are: acc-phys
22
The categories of this paper are: chao-dyn