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Table A.2

Mid-IR lines detected with Spitzer/IRS towards the Class 0 protostar Serpens SMM1 and line fluxes (uncorrected for extinction) within a 7′′  ×  7′′ aperture.

Species Transition E up λ Line flux
(K) (μm) (W m-2)

Fe+ 961 35.349 2.45E-17
Si+ 414 34.815 6.29E-17
p-H2 0–0 S(0) J = 2–0 509 28.219  <5.92E-18
Fe+ 554 25.988 8.12E-17
S 570 25.249 3.24E-17
Fe+ 4087 24.519 4.46E-17

Fe+ 3499 17.936 1.36E-17
o-H2 0–0 S(1) J = 3–1 1015 17.035 5.96E-19
Ne+ 1124 12.814 7.06E-18
p-H2 0–0 S(2) J = 4–2 1682 12.279 2.42E-18

Notes. The horizontal line shows the transition between the LH and SH modules. Intensity errors up to  ~25%.

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