The molecular environment of the solar-type protostar IRAS 16293–2422

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Table D.1

List of line parameters for the formaldehyde transitions considered for the temperature derivation.

Transition	o/p	ν (MHz)	E_up (K)	A_ul (s⁻¹)	g_up
4_1,4−3_1,3	o	281526.929	45.6	5.88×10⁻⁴	27
4_0,4−3_0,3	p	290623.405	34.9	6.90×10⁻⁴	9
4_2,3−3_2,2	p	291237.780	82.1	5.21×10⁻⁴	9
4_3,2−3_3,1	o	291380.442	140.9	3.04×10⁻⁴	27
4_3,1−3_3,0	o	291384.361	140.9	3.04×10⁻⁴	27
4_2,2−3_2,1	p	291948.060	82.1	5.24×10⁻⁴	9
5_1,5−4_1,4	o	351768.645	62.5	1.20×10⁻³	33
5_0,5−4_0,4	p	362736.048	52.3	1.37×10⁻³	11

Notes. Frequencies ν, upper level energies E_up, Einstein coefficients A_ul and degeneracies g_up are adopted from the CDMS and JPL catalogs. The second column indicates if the transition correspond to the ortho (o) or para (p) form of H₂CO respectively.

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