Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The ESO K'-band Galaxy Survey - Galaxy Counts   We present K'-band galaxy counts in the magnitude range $13 < K' < 20$,
obtained from two independent surveys near the South Galactic Pole, covering an
area of $\sim 40 arcmin^2$ and $\sim 170 arcmin^2$, including $\sim 200$ and
$\sim 1000$ objects respectively up to a magnitude limit $K' \sim 20.0$ and
$K'\sim 19.0$. At magnitudes $K > 18.5$ we surveyed an area more than 7 times
wider that covered by previous K-band surveys. Our counts are quite in good
agreement with those in the literature at magnitudes brighter than $K \sim 17$,
while are systematically lower at fainter magnitudes. We confirm a change in
the slope of the $dlogN/dm$ relation at $K' \sim 17$ from 0.57 to 0.35, but do
not find the bump shown by other K-band surveys in the magnitude range $16 < K
< 20$. Furthermore 10% of the galaxies brighter than $K' \sim 18$ have
$B-K'<3$. We suggest that these blue objects represent a population of
sub-$L^*$ nearby evolving galaxies.

22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
1
The categories of this paper are: cs
4
The categories of this paper are: cond-mat
3
The categories of this paper are: physics
24
The categories of this paper are: dg-ga
26
The categories of this paper are: bayes-an
11
The categories of this paper are: hep-lat
14
The categories of this paper are: math-ph
28
The categories of this paper are: alg-geom
32
The categories of this paper are: atom-ph
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
19
The categories of this paper are: eess
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys