Study of CS, SiO, and SiS abundances in carbon star envelopes: assessing their role as gas-phase precursors of dust

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Volume 628 (August 2019)

A&A, 628 (2019) A62

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Table A.1

Observed line parameters of CS J = 3−2, SiO J = 3−2, and the J = 7−6 and J = 8−7 lines of SiS.

Line	ν_calc	ν_obs	V _exp	∫ T_mbdv
	(MHz)	(MHz)	(km s⁻¹)	(K km s⁻¹)
IRC +10216

SiO J = 3−2	130 268.665	130 268.4(1)	13.1(1)	130.7(13)
SiS J = 7−6	127 076.180	127 076.0(1)	12.7(1)	162.9(16)
SiS J = 8−7	145 227.054	145 227.0(1)	14.7(1)	270.5(27)
CS J = 3−2	146 969.025	146 968.7(1)	14.7(1)	379.3(37)

CIT 6

SiO J = 3−2	130 268.665	130 267.8(5)	16.2(5)	19.8(19)
SiS J = 7−6	127 076.180	127 075.3(5)	16.4(5)	7.55(7)
SiS J = 8−7	145 227.054	145 225.4(10)	17.5(10)	12.5(19)
CS J = 3−2	146 969.025	146 968.6(5)	16.4(5)	89.0(89)

CRL 3068

SiO J = 3−2	130 268.665	130 268.4(1)	12.3(1)	2.18(2)
SiS J = 7−6	127 076.180	127 075.9(1)	12.2(1)	6.36(5)
SiS J = 8−7	145 227.054	145 226.7(1)	13.8(1)	9.24(9)
CS J = 3−2	146 969.025	146 968.6(1)	14.2(1)	17.2(10)

S Cep

SiO J = 3−2	130 268.665	130 268.6(1)	23.3(1)	7.80(7)
SiS J = 7−6	127 076.180	127 076.5(10)	21.0(5)	0.30(6) ^(a)
SiS J = 8−7	145 227.054	145 227.2(10)	20.8(10)	0.34(7) ^(a)
CS J = 3−2	146 969.025	146 968.9(1)	23.8(1)	19.8(2)

IRC +30374

SiO J = 3−2	130 268.665	130 268.7(1)	25.1(2)	7.07(7)
SiS J = 7− 6	127 076.180	127 076.3(1)	22.6(4)	1.73(2)
SiS J = 8− 7	145 227.054	145 227.2(1)	25.2(2)	2.99(3)
CS J = 3− 2	146 969.025	146 968.6(1)	25.8(2)	26.7(26)

LP And

SiO J = 3− 2	130 268.665	130 268.5(1)	12.9(2)	8.56(8)
SiS J = 7− 6	127 076.180	127 076.1(1)	12.1(2)	7.01(7)
SiS J = 8− 7	145 227.054	145 226.9(1)	13.8(1)	12.3(1)
CS J = 3− 2	146 969.025	146 969.0(1)	14.7(1)	35.6(35)

V Cyg

SiO J = 3− 2	130 268.665	130 268.5(1)	12.2(1)	9.03(9)
SiS J = 7− 6	127 076.180	127 076.4(1)	12.9(1)	1.41(1)
SiS J = 8− 7	145 227.054	145 227.2(1)	12.3(1)	2.45(2)
CS J = 3− 2	146 969.025	146 968.8(1)	12.1(1)	25.2(25)

V384 Per

SiO J = 3− 2	130 268.665	130 268.6(1)	14.8(1)	9.29(9)
SiS J = 7− 6	127 076.180	127 076.1(1)	12.7(1)	2.15(2)
SiS J = 8− 7	145 227.054	145 227.0(1)	14.1(1)	4.02(4)
CS J = 3− 2	146 969.025	146 968.8(1)	15.6(1)	28.7(29)

IRC +60144

SiO J = 3− 2	130 268.665	130 268.6(1)	20.8(1)	5.34(5)
SiS J = 7− 6	127 076.180	127 076.2(10)	19.4(10)	0.9(2) ^(a)
SiS J = 8− 7	145 227.054	145 226.9(1)	20.9(1)	1.65(1)
CS J = 3− 2	146 969.025	146 968.7(1)	20.9(1)	12.5(12)

U Cam

SiO J = 3−2	130 268.665	130 268.2(1)	11.6(1)	0.96(1)
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–	–
CS J = 3−2	146 969.025	146 968.8(1)	13.5(1)	4.7(5)

IRC +20370

SiO J = 3−2	130 268.665	130 268.5(1)	13.1(1)	7.25(7)
SiS J = 7−6	127 076.180	127 076.1(1)	12.7(1)	3.10(2)
SiS J = 8−7	145 227.054	145 227.1(5)	13.8(4)	5.64(5)
CS J = 3−2	146 969.025	146 968.9(5)	13.2(8)	19.9(20)

CRL 67

SiO J = 3−2	130 268.665	130 268.6(1)	14.5(1)	2.88(3)
SiS J = 7−6	127 076.180	127 076.4(1)	13.6(1)	1.62(1)
SiS J = 8−7	145 227.054	145 226.9(1)	15.4(2)	2.83(2)
CS J = 3−2	146 969.025	146 968.9(1)	16.1(2)	12.3(12)

CRL 190

SiO J = 3−2	130 268.665	130 269.5(5)	16.3(5)	0.39(4)
SiS J = 7−6	127 076.180	127 076.2(1)	16.6(1)	1.45(1)
SiS J = 8−7	145 227.054	145 227.0(1)	16.2(1)	1.93(2)
CS J = 3−2	146 969.025	146 968.7(1)	16.9(2)	6.76(7)

V Aql

SiO J = 3−2	130 268.665	130 268.4(1)	7.2(1)	0.44(4)
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–	–
CS J = 3−2	146 969.025	146 968.8(1)	9.2(1)	4.30(4)

CRL 2477

SiO J = 3−2	130 268.665	130 268.1(1)	16.7(1)	1.28(1)
SiS J = 7− 6	127 076.180	127 076.2(1)	16.5(1)	2.64(2)
SiS J = 8− 7	145 227.054	145 226.8(1)	19.2(2)	2.93(3)
CS J = 3− 2	146 969.025	146 968.6(1)	20.1(1)	7.17(7)

CRL 2494

SiO J = 3− 2	130 268.665	130 268.8(1)	16.4(2)	2.64(3)
SiS J = 7− 6	127 076.180	127 077.0(10)	20.4(10)	1.04(20)
SiS J = 8− 7	145 227.054	145 227.4(2)	19.0(6)	1.57(15)
CS J = 3− 2	146 969.025	146 968.9(1)	19.6(1)	13.2(13)

Rv Aqr

SiO J = 3− 2	130 268.665	130 268.3(1)	14.0(2)	5.58(5)
SiS J = 7− 6	127 076.180	127 076.1(5)	13.3(5)	0.71(7)
SiS J = 8− 7	145 227.054	145 226.9(1)	14.6(2)	1.34(1)
CS J = 3− 2	146 969.025	146 968.6(1)	15.4(2)	13.3(13)

CRL 2513

SiO J = 3− 2	130 268.665	130 268.5(1)	25.7(1)	2.58(2)
SiS J = 7− 6	127 076.180	127 076.0(5)	24.2(6)	0.84(8)
SiS J = 8− 7	145 227.054	145 226.7(5)	24.9(4)	1.66(16)
CS J = 3− 2	146 969.025	146 968.7(1)	26.5(2)	8.92(9)

S Aur

SiO J = 3− 2	130 268.665	130 267.5(1)	21.8(2)	1.25(1)
SiS J = 7− 6	127 076.180	–	–	–
SiS J = 8− 7	145 227.054	–	–	–
CS J = 3− 2	146 969.025	146 968.1(1)	26.5(1)	4.05(4)

V636 Mon

SiO J = 3−2	130 268.665	130 269.3(1)	24.3(1)	3.74(4)
SiS J = 7−6	127 076.180	127 076.2(5)	24.1(5)	0.60 ^(a)
SiS J = 8−7	145 227.054	145 227.9(5)	26.5(5)	0.50(5) ^(a)
CS J = 3−2	146 969.025	146 969.8(1)	25.8(1)	8.85(9)

W Ori

SiO J = 3−2	130 268.665	130 268.1(5)	8.5(4)	0.29(3)
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–	–
CS J = 3−2	146 969.025	146 968.8(5)	10.5(8)	4.2(4)

Y CVn

SiO J = 3−2	130 268.665	130 268.3(1)	7.3(1)	0.38(4)
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–	–
CS J = 3−2	146 969.025	146 968.5(1)	9.4(1)	7.58(7)

R Lep

SiO J = 3−2	130 268.665	130 267.9(1)	19.8(2)	3.45(3)
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–
CS J = 3−2	146 969.025	146 968.3(1)	20.9(2)	5.78(6)

ST Cam

SiO J = 3−2	130 268.665	–	–	–
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–	–
CS J = 3−2	146 969.025	146 969.2(1)	11.5(1)	0.82(8)

UU Aur

SiO J = 3−2	130 268.665	130 266.2(10)	6.7(10)	0.09(2)
SiS J = 7−6	127 076.180	–	–	–
SiS J = 8−7	145 227.054	–	–	–
CS J = 3− 2	146 969.025	146 968.6(10)	11.0(1)	0.30(3)

Notes. Numbers in parentheses are 1σ uncertainties in units of the last digits. ^(a)Marginal detection.

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