Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: High-resolution rotation curves of LSB galaxies: Mass Models   We present mass models for a sample of 30 high-resolution rotation curves of
low surface brightness (LSB) galaxies. We fit both pseudo-isothermal
(core-dominated) and Cold Dark Matter (CDM) (cusp-dominated) halos for a wide
variety of assumptions about the stellar mass-to-light ratio. We find that the
pseudo-isothermal model provides superior fits. CDM fits show systematic
deviations from the data, and often have a small statistical likelihood of
being the appropriate model. The distribution of concentration parameters is
too broad, and has too low a mean, to be explained by $\Lambda$CDM. This
failing becomes more severe as increasing allowance is made for stellar mass:
NFW fits require uncomfortably low mass-to-light ratios. In contrast, the
maximum disk procedure does often succeed in predicting the inner shape of the
rotation curves, but requires uncomfortably large stellar mass-to- light
ratios. The data do admit reasonable stellar population mass-to-light ratios if
halos have cores rather than cusps.

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The categories of this paper are: cmp-lg
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The categories of this paper are: patt-sol
30
The categories of this paper are: q-alg
11
The categories of this paper are: hep-lat
2
The categories of this paper are: math
8
The categories of this paper are: hep-ex
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The categories of this paper are: chem-ph
5
The categories of this paper are: gr-qc
9
The categories of this paper are: nlin
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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: mtrl-th
4
The categories of this paper are: cond-mat
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The categories of this paper are: nucl-ex
3
The categories of this paper are: physics
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The categories of this paper are: stat