Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Yes, multi-periodic dwarfs in Upper Scorpius are binaries   We found that multi-periodic low-mass stars discovered by Kepler K2 in the
Upper Scorpius association are close binaries with typical separations of the
order of 10 au and large mass ratios. These stars were surveyed by speckle
interferometry at the SOAR telescope with spatial resolution of 0.04". Out of
129 observed targets, we resolved 70 pairs (including 16 previously known ones
and three new triple systems). The distribution of projected separations of
binaries with primary stars less massive than the Sun corresponds to a
log-normal with median of 11.6 au and logarithmic dispersion of 0.60 dex,
similar to M dwarfs in the field. Future orbits of newly discovered binaries
will provide accurate measurements of masses to calibrate pre-main sequence
evolutionary tracks; a tentative orbit of one previously known binary is
determined here.

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The categories of this paper are: econ
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The categories of this paper are: hep-th
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: cmp-lg
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-bio
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The categories of this paper are: math-ph
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The categories of this paper are: q-alg
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The categories of this paper are: mtrl-th
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The categories of this paper are: q-fin