Possibility of detecting some interstellar anions in the ISM
Abstract
Electron attachment energy (eAE) or electron affinity and the dipole moment of the neutral molecules are related to the radiative electron attachment (REA) process, which is an important formation route of interstellar anions. However, the abundances of interstellar anions in various astrophysical environments are mainly controlled by their reaction pathways, reaction rates, the abundance of precursors of anions, various energy sources (cosmic rays, UV photons), and electron density. The higher value of eAE of a neutral species suggests that it can easily accept an electron and form an anion. Here, we have studied the eAE and dipole moment of around 60 carbon chain species from eight different groups (C$_n$, C$_n$N, C$_n$O, C$_n$S, C$_n$H, C$_n$Si, C$_n$P, and HC$_n$N) by using quantum chemical method. In this presentation, I will show and discuss the results. Based on our obtained results, I will also highlight the possibility of detecting some interstellar anions in the ISM.
- Publication:
-
43rd COSPAR Scientific Assembly. Held 28 January - 4 February
- Pub Date:
- January 2021
- Bibcode:
- 2021cosp...43E1923G