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Figure 1: Schematic drawing of the jet-disk-observer geometry in the plane defined by the jets' symmetry (z) axis, and the line of sight. The solid thick lines mark the boundary of the two jets. The dotted thick line shows a cut through the twisted-tilted accretion disk. The three points which are marked i, ii, and iii, are the three points along each line of sight, at distance y from the jet's axis, for which the line of sight velocity is plotted in Fig. 3. |
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Figure 2:
Like Fig. 1, but showing the plane perpendicular to the
jets' axis, and through the source of the jets.
The tilting and twisting of the accretion disk is monotonic,
with maximum flaring in the +z direction at an angle ![]() ![]() |
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Figure 3:
The observed line of sight velocity across the jet, in units of
the real velocity along the jet's axis. y is the distance from the jet's symmetry axis, perpendicular to the line
of sight.
In each panel the upper 3 lines are for the receding jet, while the lower
3 lines are for the approaching jet.
Thick solid line is the velocity of the closest point in the jet along
the line of sight (Eq. (6); point i in Figs. 1 and 2);
Thick dashed line is the velocity of the farthest point in the jet
along the line of sight (Eq. (6) with minus sign in
front of the square root; point ii in Figs. 1 and 2);
Thin solid line is the velocity of the jet's element closest to the
jet's axis, namely, on a line from the jet's axis and perpendicular
to the line of sight (Eq. (7); point iii in Figs. 1 and 2).
In all panels the jet axis in the -z direction has an angle of
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