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by throwawaymaths
845 days ago
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You're wrong. They are parameters if you're using them to bestfit another value (rotation curves). This is basic high school science/stats. And yes, baryonic distribution is absolutely a parameter, but it's not a free parameter (or it's a less free parameter) because it's value is constrained to a measurement that is orthogonal to the quantity inferred (light vs rotation curve). Meanwhile, dm density is a free parameter. It could be zero, or, 10x the baryonic mass, or anything in between. |
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