Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Long period sdB + MS binaries with Mercator   The predicted orbital period distribution of the subdwarf-B (sdB) population
is bi-modal with a peak at short (< 10 days) and long (> 250 days) periods.
Observationally, many short-period sdB systems are indeed known. The predicted
long period peak is missing and orbits have only been determined for a few
long-period systems. As these predictions are based on poorly understood
binary-interaction processes, it is of prime importance to confront the
predictions to well-constrained observational data. We therefore initiated a
monitoring program to find and characterize long-period sdB stars with the 1.2
m Mercator telescope. Here we present the results of this program.

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The categories of this paper are: hep-ex
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ph
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The categories of this paper are: math
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The categories of this paper are: nlin
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The categories of this paper are: mtrl-th
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The categories of this paper are: eess
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The categories of this paper are: comp-gas
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The categories of this paper are: q-fin
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The categories of this paper are: gr-qc
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The categories of this paper are: ao-sci
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The categories of this paper are: solv-int
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The categories of this paper are: adap-org
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The categories of this paper are: physics
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The categories of this paper are: supr-con
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The categories of this paper are: acc-phys