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Table 7

O line equivalent widths and fluxes.

NGC 4418 Arp 220
Line λ W eq a Fluxa W eq a Fluxa
(μm) (km s-1) (10-21 W cm-2) (km s-1) (10-21 W cm-2)

O 432 → 321 59.350 1.5(0.9) −1.0(0.6) 7.9(1.1) −17.2(2.5)
O 331 → 220 67.883 2.0(0.9) −1.2(0.6) 8.3(0.9) −18.0(1.9)
O 321 → 212 75.867 7.0(1.6) −3.5(0.8) 17.9(0.8) −34.7(1.5)
O 423 → 312 79.531 6.0(1.1) −2.9(0.5) 5.4(0.8) −9.6(1.4)
O 322 → 211 90.936 3.5(1.5) −1.3(0.6) 4.2(0.7) −6.4(1.1)
O 221 → 110 109.347 5.7(1.6) −1.5(0.4) 13.2(1.8) −14.8(2.0)
O 414 → 303 114.296 b b 7.0(1.5) −7.2(1.5)
O 313 → 202 139.586 10.0(0.8) −6.8(0.5)
O 303 → 212 174.374 7.9(1.5) −2.9(0.6)
O 221 → 212 183.530 14.8(2.5) −3.8(0.7)

Notes. 

(a)

Numbers in parenthesis indicate 1σ uncertainties from Gaussian fits to the lines.

(b)

Uncertain due to baseline subtraction.

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