Table 3
Dust emission, ionized gas, and molecular properties of the ALMA continuum sources in Sgr B2.
Dust emission | Ionized gas | Molecular content | ||||||||||
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|
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M d + g | n H2 | N H2 | n e | M i | Ṅ i | lines | L lines | Ll/Lc + l | ||||
ID | (M⊙) | (108 cm-3) | (1024 cm-2) | (cm-3) | (M⊙) | (s-1) | per GHz | (0.1L⊙) | (%) | |||
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Sgr B2(N) | ||||||||||||
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AN01 | 8668–4083 | 20.94–9.86 | 130.9–61.6 | 4.8 × 104 | 0.13 | 1.9 × 1048 | 74.8 (6.9) | 92.61 | 22.1 | |||
AN02 | 623–294 | 7.77–3.66 | 48.6–22.9 | ... | ... | ... | 101.6 (6.8) | 11.77 | 33.7 | |||
AN03 | 470–221 | 4.83–2.27 | 30.2–14.2 | 4.4 × 104 | 0.013 | 1.7 × 1047 | 92.0 (4.9) | 10.81 | 37.8 | |||
AN04 | 419–198 | 3.59–1.69 | 22.4–10.6 | ... | ... | ... | 100.3 (7.6) | 7.98 | 33.6 | |||
AN05 | 346–163 | 2.47–1.16 | 15.4–7.3 | ... | ... | ... | 99.2 (24.1) | 3.12 | 19.4 | |||
AN06 | 345–163 | 2.16–1.02 | 13.5–6.4 | ... | ... | ... | 100.9 (29.4) | 3.60 | 22.0 | |||
AN07 | 104–49 | 2.70–1.27 | 16.8–7.9 | ... | ... | ... | 52.2 (24.9) | 0.48 | 11.3 | |||
AN08 | 105–49 | 1.51–0.71 | 9.5–4.5 | ... | ... | ... | 65.8 (23.9) | 0.90 | 19.1 | |||
AN09 | 141–66 | 0.75–0.35 | 4.7–2.2 | ... | ... | ... | 10.4 (8.7) | 0.02 | 0.4 | |||
AN10 | 57–27 | 0.71–0.34 | 4.5–2.1 | 7.7 × 104 | 0.017 | 4.1 × 1047 | 73.3 (11.6) | 1.39 | 33.7 | |||
AN11 | 80–38 | 0.57–0.27 | 3.6–1.7 | ... | ... | ... | 8.1 (11.1) | 0.01 | 0.3 | |||
AN12 | 140–66 | 0.60–0.28 | 3.8–1.8 | ... | ... | ... | 32.9 (33.2) | 0.07 | 1.4 | |||
AN13 | 353–166 | 0.44–0.21 | 2.8–1.3 | ... | ... | ... | 48.2 (42.3) | 0.36 | 3.0 | |||
AN14 | 167–79 | 0.39–0.18 | 2.4–1.1 | ... | ... | ... | 18.1 (10.6) | 0.11 | 1.9 | |||
AN15 | 50–23 | 0.40–0.19 | 2.5–1.2 | ... | ... | ... | 10.0 (9.9) | 0.01 | 0.4 | |||
AN16 | 159–75 | 0.32–0.15 | 2.0–0.94 | ... | ... | ... | 24.9 (15.4) | 0.14 | 2.7 | |||
AN17 | 26–12 | 0.47–0.22 | 2.9–1.4 | ... | ... | ... | 60.0 (26.2) | 0.36 | 26.8 | |||
AN18 | 122–57 | 0.34–0.16 | 2.1–1.0 | ... | ... | ... | 22.3 (13.0) | 0.11 | 2.7 | |||
AN19 | 40–19 | 0.30–0.14 | 1.8–0.87 | ... | ... | ... | 17.8 (11.9) | 0.02 | 1.5 | |||
AN20 | 12–6 | 0.31–0.14 | 1.9–0.90 | 5.8 × 104 | 0.0043 | 7.6 × 1046 | 10.1 (5.5) | 0.01 | 3.5 | |||
|
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Sgr B2(M) | ||||||||||||
|
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AM01 | 1544–727 | 23.59–11.11 | 147.4–69.4 | 4.4 × 105 | 0.072 | 9.8 × 1048 | 66.2 (32.0) | 5.90 | 7.6 | |||
AM02 | 1731–815 | 21.92–10.32 | 137.0–64.5 | 3.0 × 105 | 0.064 | 5.9 × 1048 | 69.5 (37.0) | 7.01 | 8.7 | |||
AM03 | 608–286 | 6.33–2.98 | 39.5–18.6 | ... | ... | ... | 75.7 (22.2) | 4.21 | 15.5 | |||
AM04 | 388–183 | 5.42–2.55 | 33.9–15.9 | 9.4 × 104 | 0.018 | 5.2 × 1047 | 29.6 (7.3) | 1.48 | 8.8 | |||
AM05 | 406–191 | 5.87–2.77 | 36.7–17.3 | ... | ... | ... | 75.7 (38.9) | 2.60 | 14.6 | |||
AM06 | 318–150 | 4.60–2.17 | 28.8–13.5 | ... | ... | ... | 40.5 (9.1) | 2.28 | 16.0 | |||
AM07 | 268–126 | 4.92–2.32 | 30.8–14.5 | 5.2 × 104 | 0.0065 | 1.1 × 1047 | 44.1 (8.4) | 1.41 | 12.1 | |||
AM08 | 99–46 | 4.15–1.96 | 26.0–12.2 | 3.0 × 105 | 0.011 | 1.0 × 1048 | 20.7 (10.0) | 0.47 | 8.5 | |||
AM09 | 232–109 | 3.35–1.58 | 20.9–9.9 | ... | ... | ... | 40.4 (10.3) | 1.29 | 13.1 | |||
AM10 | 340–160 | 1.46–0.69 | 9.2–4.3 | ... | ... | ... | 35.3 (8.5) | 1.32 | 9.5 | |||
AM11 | 178–84 | 2.58–1.21 | 16.1–7.6 | ... | ... | ... | 5.6 (5.3) | 0.05 | 0.7 | |||
AM12 | 185–87 | 1.44–0.68 | 9.0–4.2 | ... | ... | ... | 15.6 (8.8) | 0.62 | 8.5 | |||
AM13 | 186–88 | 1.12–0.53 | 7.0–3.3 | ... | ... | ... | 26.2 (10.5) | 0.55 | 7.5 | |||
AM14 | 101–48 | 1.30–0.61 | 8.1–3.8 | ... | ... | ... | 19.4 (7.9) | 0.73 | 16.1 | |||
AM15 | 11–5 | 0.18–0.08 | 1.1–0.52 | 1.6 × 105 | 0.023 | 1.1 × 1048 | 10.5 (6.9) | 0.18 | 8.9 | |||
AM16 | 83–39 | 0.28–0.13 | 1.7–0.82 | 6.6 × 104 | 0.10 | 2.1 × 1048 | 2.9 (2.9) | 0.06 | 1.1 | |||
AM17 | 95–45 | 0.31–0.15 | 1.9–0.91 | 4.0 × 104 | 0.067 | 8.2 × 1047 | 5.4 (4.6) | 0.04 | 1.0 | |||
AM18 | 46–21 | 0.45–0.21 | 2.8–1.3 | ... | ... | ... | 3.3 (3.4) | 0.01 | 0.9 | |||
AM19 | 62–29 | 0.39–0.19 | 2.5–1.2 | ... | ... | ... | 3.0 (4.0) | 0.02 | 0.8 | |||
AM20 | 54–26 | 0.28–0.13 | 1.7–0.81 | ... | ... | ... | 3.5 (2.9) | 0.02 | 1.1 | |||
AM21 | 22–10 | 0.32–0.15 | 2.0–0.93 | ... | ... | ... | 1.9 (2.0) | 0.01 | 0.2 | |||
AM22 | 25–12 | 0.30–0.14 | 1.9–0.88 | ... | ... | ... | 3.7 (3.1) | 0.01 | 0.9 | |||
AM23 | 48–22 | 0.23–0.11 | 1.5–0.69 | ... | ... | ... | 3.4 (4.1) | 0.02 | 1.3 | |||
AM24 | ... | ... | ... | 1.9 × 105 | 0.0083 | 4.8 × 1047 | 6.1 (3.6) | 0.03 | 6.2 | |||
AM25 | 18–9 | 0.25–0.12 | 1.6–0.75 | ... | ... | ... | 1.4 (1.6) | 0.01 | 0.8 | |||
AM26 | 39–18 | 0.22–0.10 | 1.4–0.65 | ... | ... | ... | 6.5 (4.0) | 0.08 | 6.4 | |||
AM27 | 16–8 | 0.22–0.10 | 1.3–0.63 | ... | ... | ... | 2.7 (2.5) | 0.01 | 0.9 |
Notes. The symbol “...” denotes if a source is not associated with VLA 40 GHz emission and therefore the physical parameters of an Hii region cannot be derived. For source AM24 in Sgr B2(M), all the ALMA continuum flux at 242 GHz results seems to be originated by ionized gas, the physical parameters of the dust content cannot be derived.
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