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Table 1

HF and HCl observed line parameters in IRC +10216.

ν cal a ν obs v exp b ∫dv
Transition (MHz) (MHz) (km s-1) (K km s-1)
HF
J = 1−0 1232476.3 1232467.4(80) 10.7(20) 2.4(2)
H35Cl
J = 1−0c 625915.2 – – 4.2(1)
J = 2−1 1251450.6 1251445.3(60) 13.3(25) 4.6(6)
J = 3−2 1876226.6 1876216.3(80) 12.4(20) 10.5(6)
H37Cl
J = 1−0c 624975.1 – – 1.5(1)
J = 2−1 1249571.4 1249563.3(80) 15.7(30) 3.1(5)
J = 3−2 1873410.7 1873402.0(80) 12.5(15) 5.4(6)

Notes. 

(a)

Calculated frequencies of HF and HCl from Nolt et al. (1987) and Cazzoli & Puzzarini (2004), respectively.

(b)

vexp is the half width at zero intensity. Numbers in parentheses are 1σ uncertainties in units of the last digits.

(c)

Line fitted to three components, with the center frequencies fixed to the calculated values of the three hyperfine components and the vexp parameter fixed at 14.5 km s-1.

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