Spatial distribution of small hydrocarbons in the neighborhood of the ultra compact HII region Monoceros R2

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Volume 554 (June 2013)

A&A, 554 (2013) A87

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Table 1

Summary of the observations.

Line(s)	Frequency	Instrument	FWHM	η_l^a	Position	OM^b	T_rms^c
	[GHz]		[′′]				[K]

C¹⁸O J = 2–1	219.560	IRAM-HERA	10.0	0.67	Map	OTF	0.025
C¹⁸O J = 5–4	548.830	Herschel-HIFI	38.6	0.79	Strip	OTF	0.008

CH J = 3/2–1/2	536.761^*	Herschel-HIFI	38	0.77	Strip	OTF	0.041
CH J = 5/2–3/2	1656.961^*	Herschel-HIFI	12.8	0.74	IF	SP	0.284

CCH N = 1–0	87.317^*	IRAM	29	0.85	Map	OTF	0.070
CCH N = 3–2	262.004^*	IRAM-HERA	9	0.6	Map	OTF	0.380
CCH N = 6–5	523.972^*	Herschel-HIFI	40.5	0.78	Strip	OTF	0.057

c-C₃H₂J_{K_A,K_C} = 2_1,2 − 1_0,1	85.33889	IRAM	29	0.85	Map	OTF	0.070
c-C₃H₂J_{K_A,K_C} = 4_0,4 − 3_1,3	150.82067	IRAM	16	0.64	Map	OTF	0.054
c-C₃H₂J_{K_A,K_C} = 4_1,4 − 3_0,3	150.85191	IRAM	16	0.64	Map	OTF	0.054
c-C₃H₂J_{K_A,K_C} = 6_1,6 − 5_0,5	217.82215^*	IRAM-HERA	11	0.61	Map	OTF	0.016
c-C₃H₂J_{K_A,K_C} = 5_1,4 − 4_2,3	217.94005	IRAM	11	0.61	Map	OTF	0.150
c-C₃H₂J_{K_A,K_C} = 4_3,2 − 4_2,1	227.16913	IRAM	10	0.59	Map	OTF	0.150
c-C₃H₂J_{K_A,K_C} = 7_0,7 − 6_1,6	251.31434^*	IRAM	9	0.55	Map	OTF	0.115
c-C₃H₂J_{K_A,K_C} = 6_2,5 − 5_1,6	251.52730	IRAM	9	0.55	Map	OTF	0.115

Notes..

^(a)

η_l = B_eff/F_eff

^(b)

Observing modes: on the fly (OTF), single pointing (SP).

^(c)

Calculated on a T_mb scale with Δv = 0.5 km s^-1.

^(*)

Frequency of the most intense transition of the hyperfine structure.

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