Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: SED, Metallicity and Age of Halo Globular Clusters in M33   In this paper we study the properties of ten halo globular clusters in the
nearby spiral galaxy M33. CCD images of M33 were obtained as a part of the BATC
Colour Survey of the sky in 13 intermediate-band filters from 3800 to
10000{\AA}. By aperture photometry, we obtain the spectral energy distributions
(SEDs) of these globular clusters. We estimate the ages of our sample clusters
by comparing the photometry of each object with theoretical stellar population
synthesis models for different values of metallicity. Our results suggest that
eight of the ten sample halo globular clusters have ``intermediate'' ages, i.e.
between 1 and 8 Gyrs.

3
The categories of this paper are: physics
9
The categories of this paper are: nlin
22
The categories of this paper are: chao-dyn
11
The categories of this paper are: hep-lat
27
The categories of this paper are: comp-gas
10
The categories of this paper are: q-bio
24
The categories of this paper are: dg-ga
36
The categories of this paper are: cmp-lg
37
The categories of this paper are: supr-con
26
The categories of this paper are: bayes-an
33
The categories of this paper are: plasm-ph
23
The categories of this paper are: solv-int
14
The categories of this paper are: math-ph
18
The categories of this paper are: econ
32
The categories of this paper are: atom-ph
2
The categories of this paper are: math