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Table 3.

Physical parameters of NGC 1365 compared with those of NGC 1377.

Object Rotation Or Radius Rotation or Mass Period Remarks
outflow axis or size outflow vel. dyn. (a) Gas (b) or age
PA [°] Incl. [°] [kpc pc−1] [km s−1] [×109M] [Myr]
NGC 1365

Disk (c) 130 50 22 ≈270 360 13 ≈500 H I mass
Bar (c)(d) 50 10 180 13 (d) 340 Stellar mass
Disk 50 10 310 220 9 200 H2 mass
Disk 2 310 44 2.8 40

Disk/torus (b) 1 230 12 2.4 27 “Star formation gas ring”,
Outer torus ≈130 ≈50 800 185 6 27 with solid body rotation
Outer torus 500 115 1.5 27 as visualized in Fig. A.1

Nuclear engine:
Inner torus (d) ≈160 ≈63 26 ≈100 0.06 0.007 1.6 Note torus axis tilt (d), caused by ≈30° precession angle
Black hole (d) 0.004 Rapidly spinning SMBH

Nuclear outflows:
Radio jet (c)(e) ≈135 ≈20 ≈400 0.7c? Table 2; Inclination caused by nuclear engine tilt
CO outflow (f) ≈135 ≈20 ≈400 ≈70 5.9 Sect. 4.3.1 and ref. (d); Inclination by nuclear engine tilt
(≈80) (≈2200) (≈23) (90) Unlikely inclination alternative; See Sect. 4.3.2
O III bi-cone (g) 130 50 ±2500 ±200 0.001 ≈12 Hollow, wide angle (±50°) ionized gas “fountain”
H I outflow ≈160 2000 ±200 ≈10 Fig. 7; Desorption/dissociation from icy grains?

NGC 1377

Nuclear disk (h) 15 ≈0 29 75 0.04 0.017
CO outflow (h) 15 ≈0 200 140 0.01−0.05 1.4 Opening angle ≈60−70°
Map area (j) 15 ≈0 0.16 Size: 4″ × 4″
Accretion disk (j) 15 ≈0 ≈10 110 0.03 0.018 ≈1 Rotation period
Bipolar CO jet (j) 15 ±(10−25) (k) ±150 240−850 (m) 0.002−0.02 (m) 0.2−0.7 Precession period: 0.3−1.1

Notes.

(a)

This paper, Eq. (2).

(b)

This paper, Sect. 4.1.

(d)

Combes et al. (2019), who (in their Table 4) list an inner torus tilt, with an uncertainty of ±10°.

(f)

This paper, Table 2 and Sect. 4.3.2.

(k)

In Ref. (j) estimated precession angle of CO jet and nuclear engine.

(m)

Interval depending upon precession angle.

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