Table A.15.
Rotational and centrifugal distortion constants of Si2C.
| Molecular parameters | Units MHz × | Laboratorya | Laboratorya + IRAMb | Laboratorya + IRAMc |
|---|---|---|---|---|
| A | 64074.13878(378) | 64074.33635(369) | 64074.34272(404) | |
| B | 4395.62952(799) | 4395.621073(843) | 4395.623626(348) | |
| C | 4102.01836(783) | 4102.02790(107) | 4102.024844(630) | |
| ΔJ | 10−03 | 9.74594(630) | 9.73137(179) | 9.732667(877) |
| ΔJK | 10−01 | –8.56821(162) | –8.572108(612) | –8.571519(556) |
| ΔK | 23.34171(174) | 23.58814(148) | 23.59437(205) | |
| δJ | 10−03 | 1.52762(206) | 1.519825(437) | 1.524128(254) |
| δK | 10−02 | 5.592(390) | 5.1592(453) | 5.2877(154) |
| HJ | 10−08 | .... | –4.1410(948) | –3.5784(513) |
| HJK | 10−05 | 2.2343(984) | 1.93254(547) | 1.9421(109) |
| HKJ | 10−03 | –1.9365(312) | –1.88712(796) | –1.86228(904) |
| HK | 10−02 | .... | 4.8622(170) | 4.9121(180) |
| hJ | 10−09 | .... | –5.233(186) | –4.1625(956) |
| hJK | 10−06 | .... | –6.586(361) | –3.441(148) |
| LJJK | 10−10 | .... | .... | 7.511(566) |
| LJK | 10−07 | .... | .... | –1.2081(781) |
| LKKJ | 10−06 | .... | .... | 1.236(259) |
| Nd | .... | 22 | 134 | 149 |
| Jmax | .... | 20 | 48 | 45 |
| Kmax | .... | 2 | 5 | 5 |
| νmax | 185976.78 | 350484.8 | 350484.8 | |
| σ | 0.022 | 0.697 | 0.343 | |
| σw | .... | 0.684 | 0.837 | 0.996 |
Notes. Numbers in parentheses represent the derived uncertainty (1σ) of the parameter in units of the last digit.
Fit to the laboratory lines reported by Cernicharo et al. (2015a) (see also McCarthy et al. 2015).
Rotational constants from Cernicharo et al. (2015a) derived from a fit to the laboratory and 30 m lines.
Rotational constants derived from the laboratory frequencies, the revised frequency for the lines observed with the IRAM 30 m telescope from Cernicharo et al. (2015a), and those of the new observed lines with the same telescope (see text).
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