Table 1.
Overview of different IGIMF formulations.
| Model | α1 & α2 | Reference | α3 | Reference | β | Reference |
|---|---|---|---|---|---|---|
| IGIMF-2003 | Fixed | Kroupa (2001) | Fixed | Kroupa (2001) | Fixed | Larsen (2002) |
| IGIMF-2011 | Fixed | Kroupa (2001) | Varies | Weidner et al. (2011) | Varies | Weidner et al. (2011) |
| IGIMF-2017 | Fixed | Kroupa (2001) | Varies | Marks et al. (2012) | Varies | Weidner et al. (2013c) |
| IGIMF-2018 | 0.5 ⋅ [Fe/H] | Kroupa (2002) | Varies | Marks et al. (2012) | Varies | Weidner et al. (2013c) |
| IGIMF-2020 | 35 ⋅ (Z − 0.02) | Yan et al. (2020) | Varies | Marks et al. (2012) | Varies | Weidner et al. (2013c) |
| IGIMF-2021 | 63 ⋅ (Z − 0.0142) | Yan et al. (2021) | Varies | Marks et al. (2012) | Varies | Weidner et al. (2013c) |
| IGIMF-2024 | 80 ⋅ (Z − 0.0113) | Yan et al. (2024) | Varies | Marks et al. (2012) | Varies | Weidner et al. (2013c) |
Notes. Variation of the power-law indices of the stellar IMF (Eqs. (1), (4), and (5)) applied in different models, including IGIMF-2003 from Kroupa & Weidner (2003), IGIMF-2011 from Weidner et al. (2011), IGIMF-2017 from Yan et al. (2017), IGIMF-2018 from Jeřábková et al. (2018), IGIMF-2020 from Yan et al. (2020), and IGIMF-2021 from Yan et al. (2021).
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