On the nature of faint mid-infrared sources in M 33

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Table 4

Cloud parameters for an intrinsic line ratio R = 0.5.


ID	D				N _H₂	X_CO
	pc	10⁴M_⊙	10⁴ M_⊙	cm^-3	10²⁰	10²⁰ cm^-2 K^-1

s1	..	..	..	..	..	..
s2	..	..	..	..	..	..
s3	77	26.	107.	15	36	58
s4	..	..	..	..	..	..
s5	81	20.	12.	10	25	5.6
s6	12	0.31	0.42	54	20	0.7
s7	69	17.	17.	15	32	4.0
s8	41	6.7	4.5	28	35	2.4
s9	53	8.2	6.0	16	26	1.6
s10	..	..	..	..	..	..
s11	155	89.	29.	7	33	7.3
s12	57	18.	13.	27	47	3.2
s13	81	12.	9.7	7	18	2.9
s14	102	25.	15.6	7	22	3.0
S15	98	9.3	4.6	4	12	4.0
s15	8	0.52	0.54	168	41	1.0
s16	..	..	..	..	..	..
s17	114	48.	24.	9	32	6.0
s18	73	23.	15.4	19	43	2.8
s19	94	22.	37.	8	23	9.6
s20	..	..	..	..	..	..

Notes. The cloud diameter is given in Col. 2 and the virial masses corresponding to the J = 1–0 and J = 2–1 CO lines are given in Cols. 3 and 4. The H₂ volume and column density are shown in Cols. 5 and 6 respectively and the CO-to-H₂ conversion factor in the last column (average value of those with respect to the two CO lines).

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