Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Radial-velocity study of the post-period minimum cataclysmic variable
  SDSSJ143317.78+101123.3 with an electron-multiplying CCD   We present high time-resolution spectroscopy of the eclipsing cataclysmic
variable SDSSJ143317.78+101123.3 obtained with QUCAM2, a high-speed/low-noise
electron-multiplying CCD camera. Littlefair et al. measured the mass of the
secondary star in SDSSJ143317.78+101123.3 using a light-curve fitting technique
and obtained a value of M2=0.060+/-0.003 Msun, making it one of the three first
bona-fide detections of a brown-dwarf mass donor in a cataclysmic variable. In
this paper we present a dynamical measurement supporting this important result.
We measured the radial-velocity semi-amplitude of the white dwarf from the
motion of the wings of the Halpha emission line and obtained a figure of
K1=34+/-4 km/s, in excellent agreement with the value of K1=35+/-2 km/s
predicted by Littlefair et al.'s model.

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The categories of this paper are: hep-ex
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The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
37
The categories of this paper are: supr-con
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The categories of this paper are: cs
34
The categories of this paper are: chem-ph
31
The categories of this paper are: ao-sci
25
The categories of this paper are: patt-sol
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The categories of this paper are: solv-int
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The categories of this paper are: quant-ph
18
The categories of this paper are: econ
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The categories of this paper are: stat
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The categories of this paper are: nucl-ex
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The categories of this paper are: adap-org