Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: HVC and IVC gas in the halo of the Milky Way   We combine CaII/NaI absorption and HI 21 cm emission line measurements to
analyse the metal abundances, the distribution, the small-scale structure, and
the physical conditions of intermediate- and high-velocity gas in the Galactic
halo.

17
The categories of this paper are: q-fin
26
The categories of this paper are: bayes-an
8
The categories of this paper are: hep-ex
0
The categories of this paper are: hep-ph
21
The categories of this paper are: adap-org
27
The categories of this paper are: comp-gas
33
The categories of this paper are: plasm-ph
37
The categories of this paper are: supr-con
23
The categories of this paper are: solv-int
11
The categories of this paper are: hep-lat
31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
7
The categories of this paper are: hep-th
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
10
The categories of this paper are: q-bio