Kinematics of the inner thousand AU region around the young massive star AFGL 2591–VLA3: a massive disk candidate?

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Table 5

Source positions and size parameters of VLA3 derived from molecular species.

	Δα^a	Δδ^a	θ_major^b	θ_minor^b	PA^b	V_grad PA^c
Molecule	(″)	(″)	(″)	(″)	(°)	(°)

HDO	0.13	−0.08	1.03	0.86	48 ± 15	54 ± 12
HO^d	0.07	0.05	0.84	0.39	15 ± 7	40 ± 7
	0.14	0.06	...	...	...	...
SO₂^d	0.09	−0.08	0.98	0.92	−2 ± 5	33 ± 9
	0.13	0.12	...	...	...	...

Notes. Positions and source sizes are derived in visibility domain.

^(a)

Position offset with respect to and .

^(b)

FWHM source size and position angle.

^(c)

Position angle of the velocity gradient measured from blue- and red-shifted components. See also Fig. 3.

^(d)

Model with a Gaussian plus a point source.

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