Probing the initial conditions of high-mass star formation - II. Fragmentation, stability, and chemistry towards high-mass star-forming regions G29.96−0.02 and G35.20−1.74

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Volume 530 (June 2011)

A&A, 530 (2011) A118

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Table 4

Line parameters, and virial mass for NH₂D cores.

Core	Offsets	v _LSR	Δv^a	τ_tot^b	R_eff	M_vir^c	M_dust^c	α^d	ρ^e
	arcsec	km s^-1	km s^-1		parsec	M_⊙	M_⊙		10⁵ (cm^-3)

			G29.96e
P1	(6.0, 25.0)	103.67 (0.01)	0.94 (0.02)	2.40 (0.29)	0.24	44	255	0.2	1
P2	(0.0, 8.0)	103.17 (0.01)	1.41 (0.02)	3.81 (0.2)	0.219	91	1168	0.1	4
P3	(23.0, –16.0)¹	102.77 (0.02)	0.73 (0.03)	2.69 (0.59)	0.135	15	< 56	–	–
P4	(–2.0, –33.0)¹	102.87 (0.03)	1.11 (0.04)	5.78 (0.78)	0.145	37	< 9	–	–
P5	(10.0, –18.0)¹	101.57 (0.01)	0.72 (0.02)	3.26 (0.48)	0.127	12	< 73	–	–
P6	(16.0, –11.0)¹	102.47 (0.01)	0.68 (0.03)	1.5 (0.52)	0.117	11	< 70	–	–
P7	(–1.0, –26.0)¹	103.27 (0.02)	0.98 (0.04)	7.48 (0.9)	0.125	25	< 75	–	–
P8	(3.0, –13.0)	103.37 (0.03)	1.22 (0.04)	5.0 (0.56)	0.074	23	132	0.2	11
P9	(3.0, 6.0)	103.17 (0.01)	1.42 (0.02)	3.74 (0.2)	0.19	80	986	0.1	5
P10	(–6.0, –4.0)	102.37 (0.27)	0.8 (0.91)	0.95 (0.1)	0.154	21	289	0.1	3
P11	(–15.0, 28.0)³	101.87 (0.03)	0.69 (0.05)	7.29 (1.95)	–	–	<7	–	–

				G35.20w
		km s^-1	km s^-1		parsec	M_⊙	M_⊙		10⁵ (cm^-3)

P1	(–13.0, –5.0)	41.70 (0.01)	0.71 (0.01)	3.58 (0.22)	0.118	13	120	0.1	0.3
P2	(–3.0, 4.0)²	41.40 (0.02)	0.98 (0.05)	2.76 (0.23)	0.067	–	163	–	2
		42.60 (0.02)	0.74 (0.03)	3.82 (0.32)	0.067	–	152	–	2
P3	(–5.0, 7.0)²	41.70 (0.04)	1.56 (0.08)	3.56 (0.29)	0.065	–	114	–	1
		42.70 (0.01)	0.68 (0.02)	3.59 (0.33)	0.065	–	106	–	1
P4	(–8.0, 5.0)	42.00 (0.01)	1.22 (0.02)	3.98 (0.26)	0.043	13	46	0.3	2
P5	(7.0, 4.0)	42.00 (0.02)	1.37 (0.03)	2.56 (0.33)	0.056	22	184	0.1	4
P6	(13.0, –1.0)	42.70 (0.03)	1.69 (0.06)	2.89 (0.41)	0.049	29	148	0.2	4
P7	(8.0, 0.0)	42.40 (0.02)	1.33 (0.04)	3.14 (0.35)	0.058	21	252	0.1	4
P8	(–21.0, 1.0)³	42.40 (0.01)	0.5 (0.03)	5.56 (1.01)	–	–	< 22	–	–
P9	(11.0, –6.0)	43.70 (0.02)	0.9 (0.04)	1.6 (0.53)	0.036	6	54	0.1	4
P10	(–15.0, 10.0)⁴	42.20 (0.27)	1.25 (0.91)	0.98 (0.1)	–	–	< 16	–	–
P11	(–15.0, 13.0)	42.00 (0.02)	0.6 (0.04)	2.97 (0.78)	0.023	2	19	0.1	5
P12	(6.0, –1.0)⁴	42.50 (0.02)	1.01 (0.03)	3.32 (0.43)	–	–	95	–	–
P13	(–20.0, 17.0)³	42.30 (0.02)	0.54 (0.05)	1.83 (1.18)	–	–	< 9	–	–

Notes.

^(a)

FWHM from the hyperfine fits over an effective area of radius R_eff deduced from CLUMPFIND.

^(b)

Total optical depth from the hyperfine fits over an effective area of radius R_eff deduced from CLUMPFIND.

^(c)

Virial Mass, and 3.5 mm dust continuum mass computed over an effective area of radius R_eff (deconvolved with the beam) deduced from CLUMPFIND. Dust mass calculated for a temperature of 16 K.

^(d)

Virial parameter defined in the text.

^(e)

Average gas density over R_eff.

⁽¹⁾

NH₂D emission with associated very weak or no dust emission (≤ 3σ).

⁽²⁾

Since there are two velocity components, no virial mass has been calculated.

⁽³⁾

Point like NH₂D emission with associated very weak or no dust emission (≤ 3σ). Dust continuum mass is only a 3σ upper limit over the area integrated flux.

⁽⁴⁾

Point like NH₂D emission with associated continuum emission (>3σ).

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