Integral field spectroscopy of the planetary nebula NGC 3242 and the puzzling nature of its low-ionization structures

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Table A.2

Physical parameters and emission line ratios, resulting from the specific slit analysis for the new structures (2^nd column), the four knots (columns 3 to 6), and the surrounding environment of the new structures (final column).

	new structures	k1	k2	k3	k4	surrounding gas

T_e(K)/n_e (cm⁻³)
T_e ([S III])	11 600±660	11 700±660	12 100±760	14 900±1100	11 700±700	11 900±790
T_e ([N II])	12 000±770	11 300±500	10 700±600	11 400±700	11 400±600	11 700±840
n_e ([Cl III])	900±500	1 200±870	3 100±1300	2 300±1100	1 400±800	900±300
n_e ([S II])	1 500±300	1 800±500	4 500±1000	3 400±1000	2 200±500	1 500±300

Emission line ratios

log ([S III]/[S II])	1.06±0.04	0.37±0.04	1.01±0.03	1.25±0.04	0.58±0.04	1.16±0.04
log ([O III]/[O I])	4.18±0.04	2.60±0.04	4.80±0.03	4.74±0.04	2.97±0.04	4.22±0.04
log ([N II]/Hα)	−2.04±0.03	−1.00±0.02	−1.90±0.02	−2.30±0.02	−1.20±0.02	−2.30±0.03
log ([S II]/Hα)	−2.54±0.03	−1.86±0.02	−2.54±0.02	−3.70±0.03	−2.10±0.02	−2.80±0.03
log ([N II]/[O III])	−2.85±0.02	−1.88±0.02	−2.69±0.02	−3.05±0.02	−1.85±0.02	−3.10±0.02

Notes. Where [S III], [S II], [O III], [O I] and [N II] stand for [S III] λ(6312+9069), [S II] λ(6716+6731), [O III] λ(4959+5007), [O I] λ(6300+6363) and [N II] λ(6548+6583), respectively.

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