Open Access
Table 1.
Parameters used to calculate column or surface densities of molecular hydrogen in several studies of M33.
| Study | κ0 | β | DGR | XCO factor | Resolution |
|---|---|---|---|---|---|
| Braine et al. (2010b) | Pixel-by-pixel | Fixed | Pixel-by-pixel | Pixel-by-pixel | 40″ |
| Tabatabaei et al. (2014) | Fixed | Pixel-by-pixel | Fixed | – | 40″ |
| Gratier et al. (2017) | Pixel-by-pixel | Only radially | Only radially | Only radially | 25″ |
| Clark et al. (2021) | Fixed | Fixed | Fixed | Fixed | 40″ |
| This study | Pixel-by-pixel | Pixel-by-pixel | Pixel-by-pixel | Pixel-by-pixel | 18.2″ |
Notes. The other studies either employed fixed parameters values or implemented them only partially on a pixel-by-pixel basis. Furthermore, these studies attained a relatively coarser spatial resolution.
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