Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radial velocity monitoring of long period hot subdwarf + main sequence
  binaries with HERMES@Mercator   Population synthesis models predict that the majority of sdBs form through
stable mass transfer leading to long period binaries. To date, about a hundred
close short-period binaries with an sdB component have been found, but not a
single long-period system has been established. We show preliminary results
from our recent effort in determining orbits for a sample of long-period sdB
systems using the HERMES spectrograph on the Mercator telescope.

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The categories of this paper are: q-bio
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The categories of this paper are: cond-mat
18
The categories of this paper are: econ
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
21
The categories of this paper are: adap-org
2
The categories of this paper are: math
15
The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: supr-con
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ex
23
The categories of this paper are: solv-int