High spin temperatures at large impact parameters: Ionisation in the outskirts of galaxies

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Table 1.

Values of ⟨T_spin/f ⟩ [K] at various impact parameters for the various column density profiles (Sects. 2.2.2–2.2.4).

Model	Fig.	Approximate radius/impact parameter [kpc]
		5	12	15	20	30
Measured	3		—		at 25 kpc
Galactic – poly	7
– exponential		—			≥3300
Sample – poly	11
– exponential
Simulated	14

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