The physical and chemical structure of Sagittarius B2 - IV. Converging filaments in the high-mass cluster forming region Sgr B2(N)

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Volume 628 (August 2019)

A&A, 628 (2019) A6

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Table 1

Kinematic and physical properties of the filaments in Sgr B2(N).

	Velocity gradient (km s⁻¹ pc⁻¹)				Filament parameter ^(a)

ID	CH₃OCHO	CH₃OCH₃	CH₃OH	¹³CH₃OH	M (M_⊙)	L (pc)	M∕L (M_⊙ pc⁻¹)	Ṁ (M_⊙ yr⁻¹)
F01	+31.5 ± 4	+40.0 ± 3	+37.6 ± 2	+34.9 ± 2	1050–490	0.14	7500–3500	0.039 – 0.019
– I	+129.0 ± 10	+60.3 ± 11	+100.3 ± 9	+29.6 ± 11	690–320	0.03	23000–10800	0.057 – 0.027
– II	+1.2 ± 2	+13.5 ± 2	+11.0 ± 2	+26.4 ± 2	380–180	0.08	4800–2300	0.005 – 0.003
– III	+96.4 ± 12	+95.3 ± 7	+88.9 ± 6	+152.2 ± 20	16–7	0.03	540–250	0.002 – 0.001

F03	+20.0 ± 1	+19.9 ± 2	+9.0 ± 3	+28.6 ± 2	620–290	0.13	4800–2200	0.013 – 0.006
– I	+8.4 ± 3	+6.8 ± 2	+6.5 ± 1	+10.4 ± 2	200–95	0.03	6800–3200	0.002 – 0.001
– II	+8.8 ± 2	+16.8 ± 1	+17.7 ± 1	+18.5 ± 1	40–18	0.05	800–380	0.001 – 0.001

F04	−22.1 ± 2	−12.8 ± 2	−12.4 ± 2	−9.7 ± 1	570–270	0.14	4100–1900	0.008 – 0.004

F05	−17.0 ± 2	−20.7 ± 1	−28.0 ± 1	−18.1 ± 1	490–230	0.13	3800–1800	0.010 – 0.005

F06	−54.7 ± 2	−41.0 ± 2	−46.0 ± 2	−39.4 ± 2	410–190	0.16	2500–1200	0.019 – 0.009
– a	−18.1 ± 2	−13.6 ± 1	+67.1 ± 1	−24.3 ± 1	500–240	0.02	25000–12000	0.009 – 0.004
– b	−43.1 ± 2	−103.3 ± 17	−46.4 ± 31	−40.7 ± 7	500–240	0.02	25000–12000	0.023 – 0.011

F07	+52.3 ± 4	+38.9 ± 3	+61.5 ± 2	+70.2 ± 7	970–460	0.10	9700–4600	0.057 – 0.027

F08	+18.0 ± 2	+16.1 ± 2	+11.0 ± 1	+18.2 ± 2	810–380	0.30	2700–1300	0.015 – 0.007
– I	−17.3 ± 2	−14.9 ± 1	−6.1 ± 4	−8.1 ± 1	200–95	0.03	6700–3200	0.003 – 0.002
– II	+94.5 ± 6	+85.2 ± 5	+48.5 ± 7	+77.7 ± 3	210–100	0.01	21000–9900	0.018 – 0.009
– III	+5.8 ± 4	−6.2 ± 3	+23.5 ± 1	−9.9 ± 2	150–70	0.03	5100–2400	0.001 – 0.001

Notes. ^(a) Mass accretion rates have been computed with the median of the velocity gradients of the four species.

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