Table 1 The best-fitting number fraction of each type of SN to reproduce the observed abundance ratios of Ar/Fe, Ca/Fe, Cr/Fe, Mn/Fe and Ni/Fe in the Circinus centre
From: Accurate determination of chemical abundances near a supermassive black hole
MCCSN,upa | SN Ia (%) | CCSN (%) | Reduced χ2 (Degrees of freedom) | |
|---|---|---|---|---|
Near-MChb | Sub-MChc | |||
\({Z}_{{\rm{C}}{\rm{C}}{\rm{S}}{\rm{N}}}=0.02\) (solar metallicity) | ||||
40 M⊙ | 19 | 21 | 60 | 3.32 (3) |
35 M⊙ | 18 | 19 | 63 | 3.14 (3) |
30 M⊙ | 17 | 17 | 66 | 2.73 (3) |
25 M⊙ | 13 | 9 | 78 | 1.90 (3) |
20 M⊙ | 8 | 0 | 92 | 1.12 (3) |
18 M⊙ | 9 | 1 | 90 | 1.60 (3) |
\({Z}_{{\rm{C}}{\rm{C}}{\rm{S}}{\rm{N}}}=0.05\) (supersolar metallicity) | ||||
40 M⊙ | 14 | 22 | 64 | 2.90 (3) |
25 M⊙ | 8 | 9 | 73 | 1.47 (3) |
20 M⊙ | 5 | 3 | 92 | 1.06 (3) |
18 M⊙ | 5 | 2 | 93 | 1.16 (3) |
