Abundance anomaly of the 13C species of CCH | Astronomy & Astrophysics (A&A)

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Table A.2:

Molecular constants for C¹³CH.
Constant	$\quad$
B	42631.383 (fixed)
D	0.10157 (fixed)
$\gamma$	-60.960(3)
b(¹³C)	140.77(7)
c(¹³C)	64.09(3)
b(H)	40.48(3)
c(H)	12.182(12)
$V_{\rm LSR}$	5.950(5)

Notes. Units are in MHz except for $V_{\rm LSR}$ which is in km s^-1, B and D are taken from McCarthy et al. (1995). The numbers in parentheses represent one standard deviation in units of the last significant digits. Note that the rotational constants of CCH and ¹³CCH are 43674.52894 MHz (M $\ddot{\rm u}$ ller et al. 2000) and 42077.462 MHz (McCarthy et al. 1995), respectively.

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