Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Roche tomography of the secondary stars in CVs   The secondary stars in cataclysmic variables (CVs) are key to our
understanding of the origin, evolution and behaviour of this class of
interacting binary. In seeking a fuller understanding of these objects, the
challenge for observers is to obtain images of the secondary star. This goal
can be achieved through Roche tomography, an indirect imaging technique that
can be used to map the Roche-lobe-filling secondary. The review begins with a
description of the basic principles that underpin Roche tomography, including
methods for determining the system parameters. Finally, we conclude with a look
at the main scientific highlights to date, including the first unambiguous
detection of starspots on AE Aqr B, and consider the future prospects of this
technique.

10
The categories of this paper are: q-bio
36
The categories of this paper are: cmp-lg
25
The categories of this paper are: patt-sol
2
The categories of this paper are: math
18
The categories of this paper are: econ
23
The categories of this paper are: solv-int
3
The categories of this paper are: physics
33
The categories of this paper are: plasm-ph
7
The categories of this paper are: hep-th
4
The categories of this paper are: cond-mat
19
The categories of this paper are: eess
29
The categories of this paper are: funct-an
34
The categories of this paper are: chem-ph
28
The categories of this paper are: alg-geom
31
The categories of this paper are: ao-sci
11
The categories of this paper are: hep-lat