The Tentative Detection of Silylidyne

The tentative identification of silylidyne, SiH, toward Orion KL was reported by
P. Schilke, D. J. Benford, T. R. Hunter, D. C. Lis, and T. G. Philips,
A Line Survey of Orion-KL from 607 to 725 GHz
Astrophys. J. Suppl. Ser. 132, 281–364 (2001).
The two λ components of the J = 1.5 – 0.5 transition pertaining to the energetically lower lying Π1/2 spin-state near 624.9 and 627.7 GHz were detected. However, they were at least partially overlapped. As the source is rather line rich, the detection was viewed as tentative.

Contributor(s): H. S. P. Müller; 06, 2006