A line-confusion limited millimeter survey of Orion KL - II. Silicon-bearing species

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Table 2

Emission lines of SiO, SiO isotopologs, and SiO vibrationally excited present in the frequency range of the Orion KL survey.

Molecule	Observed	T_MB		Trasition	Rest	E_u	S_ij
	v_LSR (km s^-1)	(K)	(K km s^-1)	J	Frequency (MHz)	(K)

SiO	11.0	17.5	394 ± 18	2−1	86846.971	6.3	2.00
	8.5	25.6	590 ± 18	3−2	130268.665	12.5	3.00
	8.5	44.6	962 ± 29	4−3	173688.210	20.8	4.00
	7.3	45.0	1485 ± 22	5−4	217104.889	31.3	5.00
	8.0	61.1	2219 ± 43	6−5	260517.985	43.8	6.00
²⁹SiO	11.5	1.27	...	2−1	85759.202	6.2	2.00
	11.3	9.22	238 ± 20	4−3	171512.814	20.6	4.00
	15.5¹	9.40	...	5−4	214385.778	30.9	5.00
	10.6²	12.9	...	6−5	257255.249	43.2	6.00
³⁰SiO	14.9³	1.41	...	2−1	84746.193	6.1	2.00
	10.1	6.17	108 ± 5	4−3	169486.929	20.3	4.00
	10.6	6.36	140 ± 4	5−4	211853.546	30.5	5.00
	10.0	12.6⁴	153 ± 14	6−5	254216.751	42.7	6.00
Si¹⁸O	6.9⁵	0.26	...	2−1	80704.907	5.8	2.00
	8.6	4.30⁵^,⁶	...	4−3	161404.866	19.4	4.00
	11.2	0.65²	...	5−4	201751.443	29.0	5.00
	⁷	...	...	6−5	242094.928	40.7	6.00
Si¹⁷O	20.4⁸	0.27	...	2−1	83588.641	6.0	2.00
	12.3	0.40	...	4−3	167171.974	20.1	4.00
	12.7	0.71⁹	...	5−4	208959.990	30.1	5.00
	9.2	0.55	...	6−5	250744.688	42.1	6.00
SiO v = 1	14.2	77.5	587 ± 20	2−1	86243.430	6.2	2.00
	−3.9	113.5	750 ± 19	...	...	...	...
	14.0	21.5	123 ± 14	4−3	172481.125	20.7	4.00
	−4.5	4.20	...	...	...	...	...
	¹⁰	< 1.2	...	5−4	215596.029	31.0	5.00
	²	< 1.2	...	6−5	258707.350	43.5	6.00

Notes. Column 2 gives the observed (centroid) radial velocities; Col. 3: peak line temperature; Col. 4: integrated intensity; Col. 5: line transition; Col. 6: calculated rest frequencies; Col. 7: energy of the upper level; Col. 8: line strength.

⁽¹⁾

Blended with ³⁴SH₂.

⁽²⁾

Blended with CH₃OCOH.

⁽³⁾

Blended with CH₃OH.

⁽⁴⁾

Blended with CH₃CH₂CN b type.

⁽⁵⁾

Blended with CH₃CH₂CN in the plane torsion (Tercero et al., in prep.).

⁽⁶⁾

Blended with CH₂CHCN.

⁽⁷⁾

Blended with CH₃CH₂CN a type.

⁽⁸⁾

Blended with H₅₃β and U line.

⁽⁹⁾

Blended with CH₃CH₂C¹⁵N.

⁽¹⁰⁾

Blended with CH₃CH₂CN out of plane torsion (Tercero et al., in prep.).

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