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Table 3.

Properties of the kinematically disturbed HI clouds.

Componenta b
1019 cm −2 K−1
NHIc (1019 cm−2) dd (pc) nHIe (cm−3) mHIf (104M) υg (km s−1) rh (pc) HIi (M yr−1)
S4 0.18 18 ≲36 30 0.65 640 ≲40 1.2
S3 0.40 40 ≲36 60 1.5 420 ≲40 1.7
S2a 0.33 33 ≲36 50 1.2 150 ≲40 0.5
Nucleus 0.78 78 ≲36 120 2.8 640 ≲40 5
S2b 0.18 1.8 56 × 15 2 0.28 150 310 0.2



Label of the kinematic component (see Fig. 4). The values for “Nucleus” were obtained after integrating over S2a, S3, and S4.


H I column density normalised by spin temperature.


H I column density. For S4, S3, and S2a, Tspin = 1000 K is assumed, while for S2b Tspin = 100 K is assumed.


Projected size of the components. For S2a, S3, and S4, a spherical geometry is assumed with an upper limit of the diameter based on the synthesized beam. For S2b, an ellipsoidal geometry is assumed, with the major and minor axis given.


Density of the H I clouds. The same Tspin values as for the column density are assumed here.


Mass of the H I clouds for the chosen Tspin values.


Peak velocity of the H I clouds relative to the peak velocity of S1.


Deprojected distance of the H I clouds relative to the nucleus.


Mass outflow rate following Heckman (2002) for the chosen Tspin values.

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