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Table 7

Statistics of the local metallicity distributions of SNe discovered in untargeted and targeted searches.

Untargeted Targeted


Type Mean σ σ m Median N SN Mean σ σ m Median N SN

Iaa 8.455 0.129 0.010 8.503 171 8.520 0.083 0.010 8.543 70
Ic 8.458 0.124 0.026 8.515 22 8.495 0.112 0.020 8.511 30
II 8.447 0.126 0.021 8.511 35 8.450 0.127 0.013 8.475 92
IIb 8.367 0.149 0.053 8.302 8 8.415 0.101 0.034 8.404 9
Ib 8.355 0.130 0.031 8.388 18 8.461 0.102 0.019 8.468 28
Ic-bl 8.274 0.151 0.048 8.261 10 8.436 0.123 0.055 8.481 5

Ib/IIb 8.359 0.133 0.026 8.344 26 8.450 0.100 0.016 8.448 39
Ibc 8.418 0.133 0.020 8.428 44 8.485 0.107 0.014 8.511 62
IIn 8.427 0.150 0.025 8.475 35
CC 8.421 0.137 0.015 8.488 88 8.455 0.126 0.009 8.481 196

Notes.For each SN subtype are shown the mean, the standard deviation σ, the standard deviation of the mean σm, the median, and the number of SNe.

(a)

The metallicities of the untargeted SN Ia sample come from Pan et al. (2014) and Childress et al. (2013). These measurements correspond to the total galaxy metallicity and have been corrected by +0.028 dex to account for the bias. See text for details.

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