Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The Tully-Fisher relation of cluster spirals at z = 0.83   We present the rest-frame B-band Tully-Fisher relation for a sample of 8
cluster spiral galaxies at z = 0.83 and 19 field spirals at z = 0.15-0.90 based
on VLT spectroscopy and HST photometry. No strong difference is detected
between the cluster and the field galaxies, but we find some evidence that the
cluster spirals are ~0.5-1 mag brighter than the field ones at a fixed rotation
velocity. Although only a ~1.5-2 sigma result, if confirmed with larger samples
this effect could be due to the cluster spirals experiencing a period of
enhanced star formation while falling into the cluster.

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The categories of this paper are: nucl-ex
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The categories of this paper are: chao-dyn
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The categories of this paper are: q-alg
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The categories of this paper are: hep-lat
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The categories of this paper are: hep-ex
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The categories of this paper are: gr-qc
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The categories of this paper are: cs
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The categories of this paper are: math-ph
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The categories of this paper are: hep-ph
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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: alg-geom
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The categories of this paper are: quant-ph
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The categories of this paper are: funct-an
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The categories of this paper are: plasm-ph
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The categories of this paper are: econ