===== On the Detection of Silicon Phosphide, SiP, in Circumstellar Environments =====

L. A. Koelemay, M. A. Burton, A. P. Singh, P. M. Sheridan, J. J. Bernal, and L. M. Ziurys\\
described the\\
**[[https://doi.org/10.3847/2041-8213/ac9d9b|Laboratory and Astronomical Detection of the SiP Radical (X<sup>2</sup>Π<sub>i</sub>): More Circumstellar Phosphorus]]**\\
//Astrophys. J. Lett.// **940**, Art. No. L11 (2022).\\
Dedicated observations of CW Leonis with the ARO 12 m dish at Kitt Peak as well as observations (dedicated and from a line survey) with the ARO SMT in the regions of the <sup>2</sup>Π<sub>3/2</sub>, //J"// = 7.5, 12.5, 15.5, and 16.5 transitions of SiP. Only the //J"// = 12.5 and 15.5 transitions near 215.05 and 262.81 GHz appear to be unblended. While this is fine for a tentative detection, it is too little for us to qualify for a definitive detection. The authors derive peak abundances only slightly lower than CP and even slightly higher than PN, but somewhat closer to the star.\\
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Contributor(s): H. S. P. Müller; 12, 2022

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