Table 5: Properties of NGC 3718 and NGC 5128.
  NGC 3718 NGC 5128 references
Host type Saa S0pecb a Verheijen & Sancisi (2001); b NED
Distance; Linear scale $[{\rm\frac{pc}{arcsec}}]$ 13.2 Mpc; 64b 3.4 Mpc; 16.5c b NED; c Israel (1998)
App. B-magnitude 11.59 mag 7.84 mag b NED
Total mass $4.4\times10^{11}$  $M_{\odot}^d$ $(3\pm1)\times10^{11}$  $M_{\odot}^e$ d Dickel & Rood (1978); e Mathieu et al. (1996)
Molecular gas mass (${M}_{\odot}$ 108) 1.8 2f f Wild & Eckart (2000)
Dust mass (${M}_{\odot}$ 105) 2.5 5.3g g Eckart et al. (1990b)
$M_{\rm {HCN}}(\mbox{H}_2)$ (107 ${M}_{\odot}$) $\le6.6$ 8.6f f Wild & Eckart (2000)
$L_{\rm CO}(10^6$ K km s-1 pc2) 51.2 92f f Wild & Eckart (2000)
$L_{\rm HCN}(10^6$ K km s-1 pc2) $\le$ 3.3 5.5f f Wild & Eckart (2000)
$L_{\rm FIR}$(109 $L_{\odot}$) 0.28 6.0f f Wild & Eckart (2000)
S(8.4 GHz) 6.6 mJyh 1.74 Jyi h Nagar et al. (2001), i Wright & Otrupcek (1990)
Position angle of major axisk -85$^\circ$ 125$^\circ$l l Sparke (1996)
Inclinationk 60$^\circ$ 73$^\circ$l l Sparke (1996)
b NED: NASA/IPAC Extragalactic Database.
k For a prominent ring or disc in the molecular gas, which can be usedas the frame of reference for a tilted ring-model; see Sect. 4.


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