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Table 8

Compilation of plasma diagnostics for the outer rings of SN1987A.

Epoch Corrected epocha Ring Ne (cm-3) T (K) Diagnostic Reference

2877 2192 SOR  < 1.3 × 103b [O II] Panagia et al. (1996)
2877 2217 NOR  < 1.3 × 103 [O II] Panagia et al. (1996)
4282 3099 NOR  < 2.2 × 103 [S II] Maran et al. (2000)
4282 4022 SOR  < 1.6 × 103 [S II] Maran et al. (2000)
5702–5705 4902–4905 SOR  < 1.0 × 103 [O II] This paper
5702–5705 4902–4905 SOR (1.00−1.10) × 104 [N II] This paper
5702–5705 4902–4905 SOR (1.95−2.00) × 104 [O III] This paper
5702–5705 4934–4937 NOR  ~1.2 × 104 [N II] This paper
5702–5705 4934–4937 NOR  ~2.7 × 104 [O III] This paper
5791 4991 SOR  < 3.3 × 103 [S II] This paper
5791 4991 SOR (1.3−1.4) × 104 [N II] This paper
5791 4991 SOR  ~2.5 × 104 [O III] This paper
7944–8021 7144–7221 SOR  < 2.3 × 103 [O II] This paper
7944–8021 7144–7221 SOR  < 3.0 × 103 [S II] This paper
7944–8021 7144–7221 SOR (1.15−1.25) × 104 [N II] This paper
7944–8021 7176–7253 NOR  ~1.2 × 104 [N II] This paper

Notes. 

(a)

In days. Corrected for light-travel time.

(b)

Allowing for a higher temperature than Panagia et al. (1996).

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