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The masses of the two objects are completely determined by a careful measurement of their relative positions on the sky over decades, combined with an accurately known distance. There is no degeneracy in this solution. For a given orbital period and separation of the two objects, the masses are entirely determined. If Sirius B were not a massive white dwarf ...


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M(Galaxy) = Ms+Mh _________ > M¹ :Mh¹ = M(Galaxy) Mg+Ms let say : mass of star + mass of halo =assume as 1 terminology of process mass of galaxy + mass of star = assume as 1 terminology of process to derive the mass of halo. we are not given the amount,so this theories would be a posible ways to collect data for mass of halo. create second terminology as ...


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Do you mean observed or simulated? I assume the former, but observing the mass $M_\mathrm{h}$ of a dark matter (DM) halo is not easy (I mean, they're invisible), so you need a model to relate $M_\mathrm{h}$ to some observable. "Observed" dark matter halos Typically, such measurements are not made in large bulks, so I don't think you can find a &...


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This paper by Wechsler & Tinker (2018) should give you a better direction. Depending on the model, different estimates of DM halos come up. You just need to go through the sections on observational evidence and the underlying papers. https://arxiv.org/pdf/1804.03097.pdf


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