A morpho-kinematic and spectroscopic study of the bipolar nebulae: M 2−9, Mz 3, and Hen 2−104

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Table 3

shape components, edge distances, and constants of proportionality for the model of Hen 2−104.

Component	edge_inner (′′)	edge_outer (′′)	k (km s^-1/′′)

Inner bipolar	−	5.6	6
Knots (red)	10.3	23.5	2.5
Knots (blue)	12.3	20.0	2.5
^†Bipolar_smooth	−	−	2.5
^††Jet knot_red	−	−	10
^††Jet knot_blue	−	−	−

Notes. The velocity law is v(r) = k(r/r₀), where k (given in km s^-1 arcsec^-1) is the constant of proportionality that maps the position to velocity, r₀ is a fiducial reference distance, and r is the distance from the centre as measured in arcsecs. The deprojected distances to the edges of the components are given in arcsecs.

^(†)

The outer edge of the smooth bipolar component ends where the knots begin.

^(††)

The Jet knot_red has a velocity of ~130 km s^-1 at 13′′, whereas the velocity of Jet knot_blue (located at 11′′) is unconstrained, since it is not covered by the spectroscopy.

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