Table 7.
Summary of the characteristics of the nuclear region and inner bar ends of NGC 6946 based on the analyses in this work.
| Unit | NUC | NBE | SBE | Section | Notes | |
|---|---|---|---|---|---|---|
| ICO(1 − 0) ∝ bulk mol. gas | [K km s−1] | 892.75 ± 2.43 | 565.91 ± 2.23 | 705.35 ± 2.25 | Section 3 | |
| ICO(2 − 1) ∝ bulk mol. gas | [K km s−1] | 587.38 ± 1.51 | 388.65 ± 0.86 | 438.52 ± 1.68 | Section 3 | |
| IHCN ∝ dense gas | [K km s−1] | 67.96 ± 0.39 | 35.19 ± 0.37 | 40.12 ± 0.36 | Section 3 | |
| ICH3OH ∝ shock | [K km s−1] | 7.15 ± 0.45 | 5.17 ± 0.40 | 11.53 ± 0.35 | Section 3 | (1) |
| ICH3OH/ICO ∝ fshocked | [%] | 2.43 ± 0.24 | 2.98 ± 0.34 | 8.85 ± 0.50 | Section 3 | (1) |
| SFR | [M⊙ yr−1] | 8.9E−2 ± 1.33E−3 | 6.0E−3 ± 1.33E−3 | 1.3E−3 ± 1.33E−3 | Section 4 | |
| Σmol | [M⊙ pc−2] | 298.07 ± 1.98 | 188.95 ± 0.26 | 235.50 ± 5.09 | Section 4 | |
Σmol/ΣSFR ∝  |
[yr−1] | 3.43E+7 | 1.46E+8 | 3.05E+8 | Section 4 | |
| IHCN/ICO ∝ fdense | [%] | 11.56 ± 0.11 | 9.07 ± 0.15 | 9.00 ± 0.14 | Section 5.2 | |
| IHNC/ICO ∝ fdense | [%] | 4.27 ± 0.11 | 2.94 ± 0.11 | 2.89 ± 0.12 | Section 5.2 | |
| ΣSFR/IHCN ∝ SFEdense | 0.13 ± 3E−3 | 0.05 ± 7E−3 | 0.02 ± 7E−3 | Section 5.2 | (2) | |
| ICO(2 − 1)/ICO(1 − 0) ∝ R21 | 0.65 ± 2E−3 | 0.70 ± 3E−3 | 0.62 ± 3E−3 | Section 6.1 | ||
| IHNC/IHCN | 0.37 ± 0.01 | 0.32 ± 0.01 | 0.31 ± 0.01 | Section 6.2 | ||
| Tk | [K] | 27.19 ± 0.06 | 31.19 ± 0.09 | 31.99 ± 0.11 | Section 6.2 | (3) |
| IHCO+/IHCN | 0.81 ± 0.01 | 0.76 ± 0.01 | 0.70 ± 0.01 | Section 6.3 | ||
| nH2 | [cm−3] | 103.7 − 4.1 | 103.3 − 4.1 | 103.4 − 4.2 | Section 6.4 |
Notes. We quote the mean values over each region that are equivalent to our beam size of 4″ ≈ 150 pc. NUC = Nuclear Region; NBE = northern inner bar end; SBE = southern inner bar end. (1) Taken from our extended molecular data set – PdBI only. CH3OH is the (2k−1k) transition and CO the (2−1) transition. (2) In units of K km s−1/(M⊙ yr−1 kpc−2). (3) If the Hacar et al. (2020) framework holds valid in NGC 6946; see detailed discussion in Sect. 6.2.
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