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- W4294025892 abstract "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." @default.
- W4294025892 created "2022-09-01" @default.
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- W4294025892 date "2001-07-18" @default.
- W4294025892 modified "2023-09-25" @default.
- W4294025892 title "High-resolution rotation curves of LSB galaxies: Mass Models" @default.
- W4294025892 doi "https://doi.org/10.48550/arxiv.astro-ph/0107366" @default.
- W4294025892 hasPublicationYear "2001" @default.
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