Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Fundamental Properties and Distances of LMC Eclipsing Binaries II. HV
  982   We have determined the distance to a second eclipsing binary system (EB) in
the Large Magellanic Cloud, HV982 (~B1 IV-V + ~B1 IV-V). The measurement of the
distance -- among other properties of the system -- is based on optical
photometry and spectroscopy and space-based UV/optical spectrophotometry. The
analysis combines the ``classical'' EB study of light and radial velocity
curves, which yields the stellar masses and radii, with a new analysis of the
observed energy distribution, which yields the effective temperature,
metallicity, and reddening of the system plus the distance ``attenuation
factor'', essentially (radius/distance)^2. Combining the results gives the
distance to HV982, which is 50.2 +/- 1.2 kpc. This distance determination
consists of a detailed study of well-understood objects (B stars) in a
well-understood evolutionary phase (core H burning), and is free of the biases
and uncertainties that plague various other techniques. After correcting for
the location of HV982, we find an implied distance to the optical center of the
LMC's bar of d(LMC) = 50.7 +/- 1.2 kpc. This result differs by nearly 5 kpc
from our earlier result for the EB HV2274, which implies a bar distance of 45.9
kpc. These results may reflect either marginally compatible measures of a
unique LMC distance or, alternatively, suggest a significant depth to the
stellar distribution in the LMC. Some evidence for this latter hypothesis is
discussed.

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The categories of this paper are: econ
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The categories of this paper are: cond-mat
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The categories of this paper are: math-ph
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The categories of this paper are: alg-geom
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The categories of this paper are: mtrl-th
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The categories of this paper are: dg-ga
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The categories of this paper are: hep-ex
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The categories of this paper are: funct-an
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The categories of this paper are: nucl-th
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The categories of this paper are: acc-phys
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The categories of this paper are: nucl-ex
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The categories of this paper are: hep-ph
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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: cmp-lg
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The categories of this paper are: ao-sci