Virial masses of RELHICs are robustly recovered from their HI gas profiles via Bayesian nested sampling, with environmental density as a free parameter eliminating systematic mass biases from mass-concentration degeneracies.
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In TNG50, high-stellar-mass galaxies show shallow inner DM slopes regardless of central or satellite status, low-mass galaxies exhibit diverse profiles with satellites steeper especially if red and in massive hosts, and inner slopes steepen from z~1 to z=0 more strongly in the hydro run.
citing papers explorer
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Weighing gas-rich starless halos: dark matter parameters inference from their gas distributions
Virial masses of RELHICs are robustly recovered from their HI gas profiles via Bayesian nested sampling, with environmental density as a free parameter eliminating systematic mass biases from mass-concentration degeneracies.
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The Inner Dark-Matter Structure of Galaxies
In TNG50, high-stellar-mass galaxies show shallow inner DM slopes regardless of central or satellite status, low-mass galaxies exhibit diverse profiles with satellites steeper especially if red and in massive hosts, and inner slopes steepen from z~1 to z=0 more strongly in the hydro run.