X-ray induced desorption and photochemistry in CO ice
arXiv:2107.10503 · doi:10.1039/D1CP02670D
Abstract
We report an investigation of X-ray induced desorption of neutrals, cations and anions from CO ice. The desorption of neutral CO, by far the most abundant, is quantified and discussed within the context of its application to astrochemistry. The desorption of many different cations, including large cations up to the mass limit of the spectrometer, are observed. In contrast, the only desorbing anions detected are O and C. The desorption mechanisms of all these species are discussed with the aid of their photodesorption spectrum. The evolution of the X-ray absorption spectrum shows significant chemical modifications of the ice upon irradiation, which along with the desorption of large cations gives a new insight into X-ray induced photochemistry in CO ice.
arXiv commentAccepted in PCCP
References in corpus (14)
- Observations of the Icy Universe
- Photochemistry and astrochemistry: photochemical pathways to interstellar complex organic molecules
- Photodesorption of ices I: CO, N2 and CO2
- Constraining the X-ray and Cosmic Ray Ionization Chemistry of the TW Hya Protoplanetary Disk: Evidence for a Sub-interstellar Cosmic Ray Rate
- CO ice photodesorption: A wavelength-dependent study
- Unusually High CO Abundance of the First Active Interstellar Comet
- The extraordinary composition of the "blue comet" C/2016 R2 (PanSTARRS)
- Evidence for a CO desorption front in the outer AS 209 disk
- Detection of C3O in the low-mass protostar Elias 18
- X-ray photodesorption from water ice in protoplanetary disks and X-ray dominated regions
- Complex organic molecules in protoplanetary disks : X-ray photodesorption from methanol-containing ices. Part I -- Pure methanol ices
- Complex organic molecules in protoplanetary disks: X-ray photodesorption from methanol-containing ices. Part II -- Mixed methanol-CO and methanol-H2O ices
- Electron-stimulated desorption from molecular ices in the sub-keV regime
- Desorption of neutrals, cations and anions from core-excited amorphous solid water