Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Multiwavelength Study of RZ Cassiopeiae: The XMM-Newton/VLA Campaign   XMM-Newton and the VLA simultaneously observed the eclipsing Algol-type
binary RZ Cassiopeiae in August 2003. The secondary eclipse (K3 IV companion
behind the A3 V primary) was placed at the center of the 15-hour radio
campaign, while the X-ray satellite monitored a full 1.2-day orbital period. We
present results of the X-ray and radio campaigns. The X-ray light curve shows
significant modulation probably related to rotational modulation and active
region evolution, and even small flares. However, the X-ray eclipse is not
deep, implying that the coronal X-ray emitting material is spatially extended.
The Reflection Grating Spectrometer (RGS) spectrum shows a variety of bright
emission lines from Fe, Ne, O, N. A strong [C/N] depletion probably reflects
the surface composition of the secondary which fills its Roche lobe and loses
material onto the primary. The O~\textsc{vii} He-like triplet reflects a low
forbidden-to-intercombination ratio; while it generally suggests high electron
densities, the ratio is here modified by photoexcitation by the strong UV flux
of the primary A3 V star. The radio light curve shows no similarity to the
X-ray light curve. The eclipse timings are different, and the radio flux
increased while the X-ray flux decreased. The radio spectral slope is shallow
($\alpha = 0 - 1$).

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The categories of this paper are: hep-lat
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The categories of this paper are: nucl-th
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The categories of this paper are: hep-ex
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The categories of this paper are: acc-phys
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The categories of this paper are: hep-ph
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The categories of this paper are: chem-ph
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The categories of this paper are: solv-int
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The categories of this paper are: dg-ga
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The categories of this paper are: atom-ph
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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: supr-con
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The categories of this paper are: gr-qc
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The categories of this paper are: cond-mat
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The categories of this paper are: hep-th
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The categories of this paper are: funct-an