Rotational excitation of C₂H^- anion in collision with H₂.

ABSTRACT: The discovery of anions in the interstellar medium has shown that they are very reactive species. This gave them great importance in the modeling of the chemical and astrophysical evolution of the interstellar medium. The detection of the first anion C₆H^- followed by the other anions C₄H^-, C₈H^- and CN^- in the interstellar medium has encouraged research on other detectable anions. The C₂H^- anion was observed for the first time in the circumstellar envelope of IRC+10216 and in TMC-1. In these cold and low-density regions, precise modeling of the chemical and physical conditions of the observed emission lines requires knowledge of the radiative and collisional excitation rates. We present here t

SUBMITTER: Toumi I 

PROVIDER: S-EPMC8697610 | biostudies-literature | 2021 Apr

REPOSITORIES: biostudies-literature