Physical properties of accretion shocks toward the Class I protostellar system Oph-IRS 44

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Table 1

Spectral setup and parameters of the observed molecular transitions.

Species	Transition	Frequency [GHz]	E_up [K]	A_ij [×10⁻⁵ s⁻¹]	rms ^(a) [mJy beam⁻¹ per channel]
SO	10₁₁–10₁₀	336.5538	143	1	2.8
SO₂	16_7,9–17_6,12	336.6696	245	6	2.8
SO₂	18_4,14–18_3,15	338.3060	197	33	2.4
SO₂	20_1,19–19_2,18	338.6118	199	29	2.5
SO₂	24_2,22–23_3,21	348.3878	293	19	2.7
SO₂	5_3,3–4_2,2	351.2572	36	34	3.4
SO₂	10_6,4–11_5,7	350.8628	139	4	3.2
³⁴SO₂	14_4,10–14_3,11	338.7857	134	31	2.5
³⁴SO₂	19_4,16–19_3,17	348.1175	213	35	2.8
³⁴SO₂^(b)	9_6,4–10_5,5	351.0896	127	4	2.8

Notes. E_up and A_ij correspond to the upper-level energy and the Einstein A coefficient, respectively. ^(a)The channel width is 0.21 km s⁻¹. ^(b)Not detected.

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