Table 2: H2O-megamaser sample properties.
  ESO 103-G035 TXS 2226-184 IC 1481
  literature
coordinatesa 18$^{\rm h}$38$^{\rm m}$20$^{\rm s}$ $-65^\circ$25$^\prime$39 $^{\prime\prime}$ 22$^{\rm h}$29$^{\rm m}$13$^{\rm s}$ $-18^\circ$10$^\prime$47 $^{\prime\prime}$ 23$^{\rm h}$19$^{\rm m}$25$^{\rm s}$ +05$^\circ$54$^\prime$22 $^{\prime\prime}$
incl.b($^\circ$) 67$^\circ$ 70$^\circ$ 62$^\circ$
m.a.c($^\circ$) 44$^\circ$ 51$^\circ$ 70$^\circ$(30$^\circ$d)
$v_{\rm opt}$e (km s-1) 3983 $\pm$ 34 - 6118f $\pm$ 50
Typeg Sy 1.9/2, Sa0 ?, S0? LINER, Sb pecf
  this work
$v_{\rm hel}^h$ (km s-1) 4040 $\pm$ 20 7520 $\pm$ 30 6120 $\pm$ 30
dist.i (Mpc) 61.9 110.6 88.5
lin. sc. (pc/ $^{\prime\prime}$) 300.2 536.3 428.8
$M_{\alpha}$j (109 $M_{\odot}$) 1.2 - -
Type Sy 2 LINER LINER
a J2000, NED.
b Inclination angle from face-on (RC3).
c Position angle of major axis (RC3).
d Taken from Braatz et al. (1997).
e Heliocentric velocity from RC3.
f Taken from van den Bergh et al. (2002).
g AGN classification and Hubble type (NED).
h Heliocentric velocity as derived from our rotation curves.
i Distance via direct application of $v = H_0 \cdot d$ (H0 = 65 km s-1 Mpc-1) using velocities relative to the
3K background as derived from $v_{\rm hel}$ with the velocity calculator provided by NED.
j Estimated lower limit of mass with $\alpha=0.6$ (Lequeux 1983) within the central 2.8 kpc (diameter).


Source LaTeX | All tables | In the text