Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Internal Kinematics of Blue CFRS Galaxies at z ~ 0.6   We present the results of a study of the internal kinematics of luminous
starforming galaxies in the 0 < z < 0.8 range, with the aim of investigating
the nature of the blue galaxies which cause the largest changes in the
luminosity function at z > 0.5. New kinematic data are analysed for a sample of
24 galaxies from the Canada-France Redshift Survey, most of them with
rest-frame (U-V)_{AB}< 1.14. Unlike most previous studies, target galaxies were
selected regardless of size and morphology, from a well-studied
magnitude-limited survey (the CFRS). Our sample is therefore representative of
the most rapidly changing 1/3 of the galaxy population in the 0 < z < 0.8
range. The 15 galaxies at z > 0.45 have sizes (from HST images) and velocity
widths sigma_{v} (from emission lines) similar to those of typical local
Irregulars. This is consistent with their morphologies and rest-frame colors;
however, these galaxies are as bright as the brightest local Irregulars, and
roughly 2 magnitudes brighter than typical Irregulars known nearby. We conclude
that the increase in the number density of luminous blue galaxies at z > 0.5 is
mainly due to a population of small and unusually-bright late-type galaxies.

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The categories of this paper are: q-fin
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-th
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The categories of this paper are: ao-sci
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The categories of this paper are: alg-geom
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The categories of this paper are: dg-ga
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The categories of this paper are: physics
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The categories of this paper are: cond-mat
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The categories of this paper are: eess
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The categories of this paper are: mtrl-th
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The categories of this paper are: hep-ph
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The categories of this paper are: patt-sol
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The categories of this paper are: cmp-lg
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The categories of this paper are: hep-ex
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The categories of this paper are: econ
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The categories of this paper are: acc-phys