Free Access

Table 2

Properties and timescales of the dense cores located within filaments in Sgr B2(N).

T(c) L Md+g Mstellar,ratio tcore,ff tfil,ff
ID (′′) (pc) (K) (×103 L) (M) (M) (%) (kyr) (kyr)
F01 A02(e) 0.64 0.21 120 61 300 ± 45 90–220 20–45 8 ± 0.3 10–16
A03(e) 0.70 0.20 195 510 140 ± 20 230–650 60–85 13 ± 0.6 9–15
A06(e) 0.90 0.19 80 24 255 ± 35 60–140 20–40 14 ± 0.6 9–13
A17 0.53 0.12 110 29 15 ± 1 70–160 80–90 27 ± 1.0 4–7

F05 A20 0.44 0.16 50(f) 0.87 20 ± 5 20–35 40–70 18 ± 0.9 7–11

F06 A10 0.64 0.11 105 36 40 ± 5 70–170 60–80 22 ± 0.9 4–6

F08 A04 0.77 0.10 170 360 140 ± 20 70–170 30–60 15 ± 0.6 3–5
A05 0.84 0.12 100 51 200 ± 30 80–200 25–55 15 ± 0.6 4–7
A07 0.44 0.12 85 7.3 70 ± 10 35–85 30–60 9 ± 0.4 4–7
A08 0.56 0.40 110 33 55 ± 10 65–170 50–80 15 ± 0.7 27–42
A11 0.84 0.18 50(f) 3.2 100 ± 15 30–60 20–40 21 ± 0.9 8–13
A15 0.80 0.27 50(f) 2.9 60 ± 10 30–60 30–55 25 ± 1.1 15–23
A19 0.83 0.45 50(f) 3.1 50 ± 5 30–65 35–60 29 ± 1.1 32–50

Hub A01 1.45 250(f) 5900 1960 ± 280 800–3000 25–65 11 ± 0.4

Notes. (a) Angular radius (θcore) of the cores as listed in Paper II. (b)The distance between the core andthe hub (dhub) is determined from a straight line connecting both, and can, therefore, be a lower limit to the real distance when considering projeciton effects. (c)The temperatures (T) have been determined for different molecular species (Möller et al., in prep.) resulting in an error of 10%. After propagation of these errors, we have determined the uncertainties in the gas mass and timescales. (d) The lower value of the stellar mass is obtained from the luminosity listed in the table after decreasing it by a factor of eight. This aims to reproduce: (i) a core radius two times smaller than the measured size, and (ii) a contribution of 50% to the total luminosity coming from accretion and not from stellar radiation. (e) Cores A02, A03, and A06 can also be connected to the central hub via filament F02. (f) Temperatures are assumed, rather than obtained by fitting.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.