Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: RS Ophiuchi in Quiescence: Why is it X-ray Faint?   The short interval between successive outbursts of RS Oph strongly suggests
that it has a high mass white dwarf accreting at a high rate. This, in turn,
suggests the possibility of prominent X-ray emission from RS Oph in quiescence.
However, archival quiescent X-ray observations of RS Oph show it to be a modest
soft X-ray source but not a strong 2-10 keV X-ray source. In this aspect, RS
Oph differs markedly from T CrB. We speculate on the possible mechanisms that
could significantly suppress the 2-10 keV X-ray emission in RS Oph.

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The categories of this paper are: hep-th
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The categories of this paper are: chem-ph
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The categories of this paper are: gr-qc
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ex
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The categories of this paper are: eess
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The categories of this paper are: chao-dyn
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The categories of this paper are: nucl-ex
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The categories of this paper are: nlin
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The categories of this paper are: comp-gas
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The categories of this paper are: stat
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The categories of this paper are: cond-mat
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The categories of this paper are: patt-sol
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The categories of this paper are: plasm-ph
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The categories of this paper are: ao-sci
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The categories of this paper are: bayes-an