Rotating toroids in G10.62–0.38, G19.61–0.23, and G29.96–0.02

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Table 5

Parameters of the toroids.

T _rot ^a

R ^b

M _gas ^b

V _rot

Vel. gradient

ΔV^c

θ _CH₃CN ^d

M _vir ^e

M _dyn ^f

Ṁ _inf ^g

t _inf

t _ff

Core

(K)

(pc)

(M_⊙)

(km s^-1)

(km s^-1 pc^-1)

(km s^-1)

(arcsec)

(M_⊙)

(M_⊙ yr^-1)

(yr)

G10

0.016

2.1

131

149

2 × 10^-2

4 × 10³

G19

244

0.031

415

1.0

615

3 × 10^-2

15 × 10³

5 × 10³

G29

158

0.011

1.6

145

173

8 × 10^-3

4 × 10³

Notes.

^(a)

From the rotational diagram method.

^(b)

Radius and mass of the toroids estimated from the 1.4 mm continuum emission.

^(c)

Line width of CH₃CN (12–11).

^(d)

Deconvolved average diameter of the 50% contour of the CH₃CN (12–11) emission.

^(e)

Virial mass estimated assuming a spherical clump with a density distribution with p = 1.5. The values should be multiplied by 1.25 for p = 0, and by 0.75 for p = 2 (see Sect. 5.3)

^(f)

Computed assuming an inclination angle with respect to the plane of the sky of 45°.

^(g)

Computed assuming V_inf = V_rot.

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