Table 1.
Physical and data properties of the sample.
| NGC 3627 | NGC 4321 | NGC 1808 | NGC 7469 | |
|---|---|---|---|---|
| Redshift | 0.00243 | 0.00524 | 0.00332 | 0.01627 |
| Distance (Mpc) | 11.32 | 15.21 | 10.8 | 71.2 |
| Linear scale (pc/″) | 54.9 | 73.7 | 52.4 | 345.2 |
| Angular resolution | 3.46″ (190 pc) | 3.65″ (269 pc) | 2.67″ (140 pc) | 0.46″ (159 pc) |
| Channel width (km s−1) | 4.77 | 4.76 | 9.52 | 4.76 |
| [C I](1–0) flux scale (K Jy−1) | 0.42 | 0.38 | 0.71 | 23.8 |
| CO(2−1) flux scale (K Jy−1) | 1.92 | 3.70 | 3.24 | 108.4 |
| [C I](1–0) channel rms (K) | 0.044 | 0.043 | 0.056 | 0.11 |
| CO(2−1) channel rms (K) | 0.022 | 0.015 | 0.083 | 0.14 |
| Imaging area | 2.35′×1.60′ | 1.28′×1.00′ | 40″ × 40″ | r ∼ 9″ |
| Imaging type | 7m, mosaic | 7m, mosaic | 12m+7m+tp, mosaic | 12m+7m, single |
| M⋆ (1010 M⊙) | 6.8 | 5.6 | 2.0 | 10.7 |
| LFIR (1010 L⊙) | 1.7 | 1.9 | 3.5 | 25 |
| LTIR (1010 L⊙) | 2.4 | 2.5 | 5.1 | 39 |
| LX (1040 erg s−1) | 0.032 | 0.12 | 1.6 | 1500 |
| SFR (M⊙ yr−1) | 3.84 | 3.56 | 7.9 (SB ring: 4.5) | 76 |
| MH2 (109 M⊙) | 6.0 | 7.8 | (SB ring: 0.52) | 15 |
| MH I (109 M⊙) | 1.1 | 2.7 | 1.7 | 5.7 |
| Mean RC I/CO | 0.11 | 0.10 | 0.16 | 0.21 |
| Mean log10 NC I/CO | −0.96 | −1.02 | −0.83 | −0.69 |
| ±2σ range of log10 NC I/CO | −1.26, −0.66 | −1.24, −0.80 | −1.03, −0.63 | −0.95, −0.43 |
Notes. Redshifts are taken from the NASA Extragalactic Database (NED). The distances of NGC 3627, NGC 4321, NGC 1808 and NGC 7469 are taken from Jacobs et al. (2009), Freedman et al. (2001), Salak et al. (2019) and Izumi et al. (2020), respectively. The stellar masses, SFRs, MH2 and MH I of NGC 3627 and NGC 4321 are taken from the PHANGS sample table v1.6 of Leroy et al. (2021a, PHANGS survey). The stellar masses and SFRs of NGC 1808 and NGC 7469 are taken from the z0MGS survey (Leroy et al. 2019; https://irsa.ipac.caltech.edu/data/WISE/z0MGS/). The MH2 and MH I of NGC 7469 are adopted from Papadopoulos & Allen (2000). The global MH I mass in NGC 1808 is measured by Koribalski et al. (1993). LFIR and LTIR are IR 40−400 μm and 8−1000 μm luminosities all from Sanders et al. (2003). The X-ray luminosities for NGC 3627 and NGC 4321 are both L0.3 − 8 keV from Grier et al. (2011), and those for NGC 1808 and NGC 7469 are L2 − 10 keV from Jiménez-Bailón et al. (2005) and Izumi et al. (2020), respectively.
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