Show pageOld revisionsBacklinksBack to top This page is read only. You can view the source, but not change it. Ask your administrator if you think this is wrong. ===== C60+ in the ISM ===== B. H. Foing and P. Ehrenfreund,\\ reported on the\\ **[[https://doi.org/10.1038/369296a0|Detection of two Interstellar Absorption Bands Coincident with Spectral Features of C<sub>60</sub><sup>+</sup>]]**\\ //Nature// **369**, 296 (1994).\\ Two weak diffuse interstellar bands at 963.2 and 957.7 nm were detected in absoption toward several reddened stars. The were assigned to C<sub>60</sub><sup>+</sup> on the basis of laboratory electronic spectra of the molecular catio isolated in neon matrix. These features were blue-shifted less than 0.1 % from the strongest matrix bands. Even though the level of agreement is in the normal range, the identification was not beyond doubt. J. Fulara, M. Jakobi, and J. P. Maier,\\ reported on\\ **[[https://doi.org/10.1016/0009-2614(93)85190-Y|Electronic and Infrared Spectra of C<sub>60</sub><sup>+</sup> and C<sub>60</sub><sup>–</sup> in Neon and Argon Matrices]]**\\ //Chem. Phys. Lett.// **211**, 227 (1993). Very recently, E. K. Campbell, M. Holz, D. Gerlich, and J. P. Maier,\\ reported on the\\ **[[https://doi.org/10.1038/nature14566|Laboratory Confirmation of C<sub>60</sub><sup>+</sup> as the Carrier of Two Diffuse Interstellar Bands]]**\\ //Nature// **523**, 322 (2015).\\ The authors determined gas phase wavelengths of two strong electronic absorption features of C<sub>60</sub><sup>+</sup> (957.75 and 963.27 nm), but also for two weaker ones (942.85 and 936.59 nm). Finally, G. A. H. Walker, D. A. Bohlender, J. P. Maier, and E. K. Campbell,\\ reported on the\\ **[[https://doi.org/10.1088/2041-8205/812/1/L8|Identification of More Interstellar C<sub>60</sub><sup>+</sup> Bands]]**\\ //Astrophys. J.// **812**, Art. No. L8 (2015).\\ In fact, the authors detected the two weaker features toward the stars HD 183143 and HD 169454, the latter from archival data. This detection dispels any possibly remaining doubt on the detection of this molecular cation. Meanwhile, S. Iglesias-Groth and M. Esposito,\\ reported on the\\ **[[https://doi.org/10.1088/2041-8205/776/1/L2|A Search for near Infrared Bands of the Fullerene Cation C<sub>60</sub><sup>+</sup> in the Protoplanetary Nebula IRAS 01005+7910]]**\\ //Astrophys. J.// **776**, Art. No. L2 (2013).\\ The authors detected the two stronger features in absorption. Before, O. Berné, G. Mulas, and C. Joblin,\\ reported on\\ **[[https://doi.org/10.1051/0004-6361/201220730|Interstellar C<sub>60</sub><sup>+</sup>]]**\\ //Astron. Astrophys.// **550**, Art. No. L4 (2013).\\ Severeal weak infrared emission features detected in a specific position of the reflection nebula NGC 7023 were assigned to stronger bands of C<sub>60</sub><sup>+</sup> based on comparsion with matrix IR spectra. ---- Contributor(s): H. S. P. Müller; 10, 2015 ---- molecules/ism/c60-plus.txt Last modified: 2019/04/24 15:31by mueller