Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Comparison of Simple Galaxy Mass Estimators   The virial, projected and spherical Jeans equation galaxy mass estimators are
compared. High-resolution models of elliptical galaxies from N-body simulations
are used to compare predicted mass profiles. Averages over eight models and
directions in the three intrinsic projections show that all the mass estimators
are comparably poor for r<4 kpc but that, with the exception of the projected
mass estimator, errors are within approximately 10 - 20% out to r=40 kpc.
Because kinematic data for elliptical galaxies are now available out to several
effective radii, mass estimation techniques which are simple to apply can
provide mass profiles and mass-to-light ratios at large radii.

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The categories of this paper are: ao-sci
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The categories of this paper are: mtrl-th
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The categories of this paper are: chem-ph
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The categories of this paper are: nucl-th
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The categories of this paper are: comp-gas
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The categories of this paper are: funct-an
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The categories of this paper are: dg-ga
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The categories of this paper are: patt-sol
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The categories of this paper are: adap-org
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The categories of this paper are: hep-ph
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The categories of this paper are: math-ph
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The categories of this paper are: supr-con
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The categories of this paper are: bayes-an
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The categories of this paper are: quant-ph
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The categories of this paper are: eess
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The categories of this paper are: alg-geom