Physical and chemical differentiation of the luminous star-forming region W49A - Results from the JCMT Spectral Legacy Survey

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Volume 577 (May 2015)

A&A, 577 (2015) A127

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Table 1

The measured spatial extent of the species detected toward the center of W49A.


Species	Number of	E_up	Spatial extent^a			Species	Number of	E_up	Spatial extent^a
	transitions	(K)	Major	Minor	Pos. angle^b		transitions	(K)	Major	Minor	Pos. angle
			axis (′′)	axis (′′)	(deg)				axis (′′)	axis (′′)	(deg)


CO	1	33	98	60	90	¹³CO	1	32	72	54	87
C¹⁷O	1	32	39	28	69	C₂H	3	42	61	46	79
CN	3	33	54	39	77	HCN	1	43	37	27	76
CS	1	66	39	24	70	DCN	1	52	36	23	146
CH₃OH	26	17−372	30	23	64	H₂CO	7	52−241	29	23	64
C³⁴S	1	65	28	23	69	H₂CS	6	91−209	30	23	142
NS	1	70	29	23	9	NO	3	36−209	29	23	62
³³SO	3	78−87	33	23	112	HNC	1	43	31	23	67
HCO⁺	1	43	32	26	179	H	2		35	23	77
SO₂	41	31−612	23	23		N₂H⁺	1	45	23	23
³³SO₂	18	35−338	23	23		¹³CS	1	80	23	23
³⁴SO₂	33	35−547	23	23		H₃O⁺	1	140	23	23
SO¹⁸O	4	117−326	23	23		SiO	1	75	23	23
SO¹⁷O	1	58−180	23	23		SO₂, v₂ = 1	9	805−998	23	23
¹³CH₃OH	1	45	23	23		SO	6	26−143	23	23
HCS⁺	1	74	23	23		³⁴SO	5	25−85	23	23
H¹³CN	1	41	23	23		OCS	3	237−271	25	23
SO⁺	1	70	23	23		HNCO	7	127−204	23	23
O¹³C³⁴S	1	247	23	23		CH₃CN	5	151−215	23	23
HC¹⁵N	1	41	23	23		H¹³CO⁺	1	42	23	23
HN¹³C	1	42	23	23		CH₃CCH	4	172−254	23	23
HCN, v₂ = 1	1	1067	23	23		HC₃N	3	307−376	23	23
HC₃N, v₇ = 1	4	629–663	23	23		HCO	1	74	23	23
CH₃OCH₃	2	48−49	23	23		S¹⁸O	3	91−99	23	23
CO⁺	1	34	23	23		H₂S	2	135−263	23	23
S¹⁷O	2	76−103	23	23		HCO	2	61−65	23	23
CH₃CHO	1	155	23	23		HNC, v₂ = 1	2	709−710	23	23
H¹⁵NC	1	43	23	23		HC¹⁷O⁺	1	42	23	23
H₂CN	3	53−100	23	23		HO¹³C⁺	1	41	23	23
HC¹⁸O⁺	1	41	23	23		H₂C³⁴S	1	118	23	23
CH₃COCH₃	1	282	23	23		HS	1	154	23	23
HS	1	154	23	23

Notes. The position angle is measured from north through east.

^(a)

The error corresponding to the fitted major and minor axis values is a few arcseconds.

^(b)

Position angles are only derived for species with significant spatial extent and elongation to minimize the uncertainty.

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