Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The structure of elliptical galaxies in the Virgo cluster. Results from
  the INT Wide Field Survey   We report on a complete CCD imaging survey of 226 elliptical galaxies in the
North-East quadrant of the Virgo cluster, representative of the properties of
giant and dwarf elliptical galaxies in this cluster. We fit their radial light
profiles with the Sersic r^(1/n) model of light distribution. We confirm the
result of Graham & Guzman (2003) that the apparent dichotomy between E and dE
galaxies in the luminosity-<mu>_e plane no longer appears when other structural
parameters are considered and can be entirely attributed to the onset of "core"
galaxies at B_T sim -20.5 mag. When "core" galaxies are not considered, E and
dE form a unique family with n linearly increasing with the luminosity. For 90
galaxies we analyze the B-I color indices, both in the nuclear and in the outer
regions. Both indices are bluer toward fainter luminosities. We find also that
the outer color gradients do not show any significant correlation with the
luminosity. The scatter in all color indicators increases significantly toward
lower luminosities, e.g. galaxies fainter than B_T sim -15 have a B-I spread
0.5 mag.

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The categories of this paper are: cs
3
The categories of this paper are: physics
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
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The categories of this paper are: math-ph
13
The categories of this paper are: quant-ph
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The categories of this paper are: bayes-an
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The categories of this paper are: patt-sol
36
The categories of this paper are: cmp-lg
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The categories of this paper are: math
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The categories of this paper are: stat
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The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
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The categories of this paper are: nlin
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The categories of this paper are: alg-geom
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The categories of this paper are: chem-ph