Probing the photoionised outflow in the NLS1 Arakelian 564: An XMM-Newton view

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Table 4

Three warm absorber components found in Ark 564.

Phase	Outflow velocity	Turbulence	Log ξ	N_H	Log L_abs	C_v	Location
	(km s^-1)	(km s^-1)	(10^-9 Wm)	(10²⁴ m^-2)	(W)		(pc)

Phase 1	−48 ± 15	130 ± 9	−0.25 ± 0.02	1.56 ± 0.08	37.0	0.03	80 ≤r≤ 74000
Phase 2	−53 ± 17	79 ± 4	1.37 ± 0.03	3.18 ± 0.12	36.2	0.17	7.5 ≤r≤ 864
Phase 3	0 ± 18	87 ± 5	2.38 ± 0.03	7.39 ± 0.39	35.6	− ^a	4.2 ≤r≤ 37

Notes. Two of the gas components are outflowing at low velocities, while the third phase is consistent with no outflow. The location of each phase has been constrained as discussed in Sect. 4.3.

^(a)

Phase 3 shows negligible outflow, which would result in a non-physical covering factor, hence we ignore it in our calculations.

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