On the Detection of the Decapentaynylide Ion, C10H–, in Space
A. Remijan, H. N. Scolati, A. M. Burkhardt, P. B. Changala, S. B. Charnley, I. R. Cooke, M. A. Cordiner, H. Gupta, E. Herbst, K. L. K. Lee, R. A. Loomis, C. N. Shingledecker, M. A. Siebert, C. Xue, M. C. McCarthy, and B. A. McGuire
reported on
Astronomical Detection of the Interstellar Anion C<sub>10</sub>H<sup>–</sup> toward TMC-1 from the GOTHAM Large Program on the Green Bank Telescope
Astrophys. J. Lett. 944, Art. No. L45 (2023).
The identification was made by stacking data from the line survey up to 30 GHz; most signal-contribution came from the 13.1 to 19.2 GHz region. The authors also report a tentative detection of C10H with a C10H– to C10H of roughly 2. In addition, C10H– is roughly 5 times more abundant than C8H– and about one third more abundant than C6H–.
More recently,
J. R. Pardo, C. Cabezas, M. Agúndez, B. Tercero, N. Marcelino, P. de Vicente, M. Guélin, and J. Cernicharo
found
A new heavy anion in IRC+10216: Theory favors C10H− versus C9N−
Astron. Astrophys. 677, Art. No. A55 (2023).
This time around, the molecule was identified in 15 not or not strongly blended transitions with 51 ≤ J ≤ 71 between 31 and 43 GHz in the course of a molecular line survey of the famous carbon rich AGB star CW Leonis carried out with the Yebes 40 m radio telescope.
Contributor(s): H. S. P. Müller; 02, 2023; 09, 2023