Star formation in Chamaeleon I and III: a molecular line study of the starless core population

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Table 3

Parameters of Cha I and III observations with Mopra.

Transition	f ^a	σ _ν ^b	HPBW ^c	δV ^d	N _cores ^e	T _sys ^f	rms^g
	(MHz)	(kHz)	(′′)	(km s^-1)		(K)	(mK)

Cha I
HNC 1–0	90 663.5680	40.0	38.0	0.11	57	155–218	15–40
HC₃N 10₁₁–9₁₀^h	90 979.0024	1.0	37.9	0.11	57	155–218	15–39
CH₃CN 5–4ⁱ	91 987.0876	0.1	37.4	0.11	57	155–218	15–39
¹³CS 2–1	92 494.3080	50.0	37.2	0.11	57	155–218	16–41
N₂H⁺ 1_2,3–0_1,2^h	93 173.7642	2.4	37.0	0.11	57	160–228	27–50
C₄H 10₁₁–9₁₀	95 150.3971	31.0	36.2	0.11	57	162–232	13–46
CH₃OH 8₀–7₁ A⁺ⁱ	95 169.4630	10.0	36.2	0.11	57	162–232	15–43
C₄H 10₁₀–9₉	95 188.9481	30.0	36.2	0.11	57	162–232	14–46
C³⁴S 2–1	96 412.9495	2.2	35.7	0.11	57	162–232	17–45
CH₃OH 2₁–1₁ E	96 739.3620	5.0	35.6	0.10	57	172–248	29–43
CH₃OH 2₀–1₀ A⁺	96 741.3750	5.0	35.6	0.10	57	172–248	29–47
C³³S 2–1ⁱ	97 172.0639	0.2	35.4	0.10	57	172–248	16–47
OCS 8–7ⁱ	97 301.2085	0.1	35.4	0.10	57	172–248	17–49
CS 2–1	97 980.9533	2.3	35.2	0.10	57	172–248	15–45
Cha III
H¹³CO⁺ 1_2,2–0_1,1^h	86 754.3004	3.9	39.7	0.12	20	177–200	35–55
HN¹³C 1_2,3,3–0_1,2,2^h	87 090.8298	3.8	39.5	0.12	20	177–200	35–56
HNCO 4_0,4,5–3_0,3,4^h	87 925.2178	0.3	39.2	0.12	20	175–198	36–71
HCN 1–0	88 631.6022	0.1	38.9	0.11	20	175–264	30–58
HCO⁺ 1–0	89 188.5247	4.1	38.6	0.11	20	167–189	40–63
HNC 1–0	90 663.5680	40.0	38.0	0.11	20	167–264	29–59
HC₃N 10₁₁–9₁₀^h	90 979.0024	1.0	37.9	0.11	20	167–264	28–53
¹³CS 2–1ⁱ	92 494.3080	50.0	37.2	0.11	20	200–264	28–42
N₂H⁺ 1_2,3–0_1,2^h	93 173.7642	2.4	37.0	0.11	20	208–274	32–45
C₄H 10₁₁–9₁₀ⁱ	95 150.3971	31.0	36.2	0.11	20	210–279	30–47
C₄H 10₁₀–9₉ⁱ	95 188.9481	30.0	36.2	0.11	20	210–279	30–47
C³⁴S 2–1ⁱ	96 412.9495	2.2	35.7	0.11	20	209–280	33–47
CH₃OH 2₁–1₁ E	96 739.3620	5.0	35.6	0.10	20	227–300	35–49
CH₃OH 2₀–1₀ A⁺	96 741.3750	5.0	35.6	0.10	20	227–300	36–50
C³³S 2–1ⁱ	97 172.0639	0.2	35.4	0.10	20	225–300	32–47
CS 2–1	97 980.9533	2.3	35.2	0.10	20	227–300	38–47

Notes.The main-beam efficiency for all transitions is 34% (see Tsitali et al. 2013) and the channel spacing in frequency is 33.7 kHz.

^(a)

Rest frequency taken from the CDMS.

^(b)

Frequency uncertainty taken from the CDMS.

^(c)

Angular resolution.

^(d)

Channel spacing in velocity.

^(e)

Number of observed cores.

^(f)

System temperature.

^(g)

rms sensitivity in scale.

^(h)

Transition with hyperfine structure.

⁽ⁱ⁾

There were no detections in these transitions.

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