| Name: | Divita Gupta |
| Affiliation: | Institute of Physics 1, University of Cologne, Germany |
| Conference ID : | ASI2024_80 |
| Title : | High resolution spectroscopy of astrochemically relevant ions |
| Authors : | Divita Gupta 1, Weslley G.D.P. Silva 1, Philipp C. Schmid 1, Eline Plaar 1, Marcel Bast 1, José L. Doménech 2, Sven Thorwirth 1, Oskar Asvany 1, Stephan Schlemmer 1 |
| Authors Affiliation: | 1. Divita Gupta, Weslley G.D.P. Silva, Philipp C. Schmid, Eline Plaar, Marcel Bast, Sven Thorwirth, Oskar Asvany, Stephan Schlemmer (I. Physikalisches Institut, Universität zu Köln, Zülpicher Str. 77, 50937 Köln, Germany)
2. José L. Doménech (Instituto de Estructura de la Materia (IEM-CSIC), Serrano 123, 28006 Madrid, Spain) |
| Mode of Presentation: | Oral |
| Abstract Category : | Stars, Interstellar Medium, and Astrochemistry in Milky Way |
| Abstract : | Molecular ions are key intermediates in the evolution of molecular complexity in the interstellar medium. Hydrocarbon ions, in particular, in the interstellar medium can also be excellent tracers of the interplay between hydrocarbon formation and their photo destruction, especially in diffuse clouds and photodissociation regions. High-resolution spectra are essential to obtain crucial inputs for an unambiguous identification of ions in space using the recently launched James Webb Space Telescope and other ground-based radio observatories, like ALMA, NRAO, IRAM, Yebes, etc. However, owing to the reactivity and transient nature of ions, they have historically proved challenging to study in terrestrial laboratory experiments.
The 22-pole ion trap instruments, like the ones available in Cologne, provide mass-selected and cryogenically cooled ions and have been revolutionary in this field to obtain accurate spectroscopic information of many ionic species. A new action spectroscopy technique, “leak-out spectroscopy” (LOS), has been recently developed in Cologne and employed to measure the spectra of the various cations of astrochemical relevance. I will discuss some recent rovibrational and rotational spectra measured for hydrocarbon ions and their isotopologues using this novel technique. Application of the LOS technique to isolate isomeric species to study isomer-specific reaction kinetics at low temperatures crucial for updating the astrochemical reaction networks will also be discussed.
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