Table 1.
Scale length of the Galactic disc fitted by Eq. (16) for the whole population and supergiants (Sample 2), compared with other works.
| Reference | Data source | Constrains | Scale length [kpc] |
|---|---|---|---|
| This work | Gaia EDR3 | ϕ ∈ [330°,30°]; the whole population | 2.19 ± 0.18 |
| This work | Gaia EDR3 | ϕ ∈ [330°,30°]; supergiants (Sample 2) | 1.99 ± 0.13 |
| Chrobáková et al. (2020) | Gaia DR2 | the whole population | 2.29 ± 0.08 |
| Li et al. (2019) | Gaia DR2 | OB stars | 2.10 ± 0.01 |
| Wang et al. (2018) | LAMOST | RGB, thin disc, R ≤ 11 kpc | 2.13 ± 0.23 |
| Wang et al. (2018) | LAMOST | RGB, thick disc, R ≤ 11 kpc | 2.72 ± 0.57 |
| López-Corredoira & Molgó (2014) | SDSS-SEGUE | thin disc |
 |
| López-Corredoira & Molgó (2014) | SDSS-SEGUE | thick disc |
 |
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