Formation of carbon dioxide by surface reactions on ices in the interstellar medium

Joe E. Roser; Gianfranco Vidali; Giulio Manicò; Valerio Pirronello

doi:10.1086/321732

Formation of carbon dioxide by surface reactions on ices in the interstellar medium

Joe E. Roser, Gianfranco Vidali, Giulio Manicò, Valerio Pirronello

Department of Physics

Research output: Contribution to journal › Article › peer-review

111 Scopus citations

Abstract

The formation of carbon dioxide by surface reactions has been investigated experimentally in conditions close to those encountered in the interstellar medium. Carbon monoxide and oxygen atoms have been concurrently deposited on a copper substrate at 5 K. The formation and release in the gas phase of carbon dioxide have been monitored by a mass spectrometer during a programmed desorption. Our measured rates and energy barrier show that it is possible to make CO₂ efficiently in ice mantles on grains without the intervention of energizing (UV or energetic particles) agents. Subject headings: dust, extinction - ISM: abundances - ISM: molecules - methods: laboratory -molecular processes.

Original language	English (US)
Pages (from-to)	L61-L64
Journal	Astrophysical Journal
Volume	555
Issue number	1 PART 2
DOIs	https://doi.org/10.1086/321732
State	Published - Jul 1 2001

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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title = "Formation of carbon dioxide by surface reactions on ices in the interstellar medium",

abstract = "The formation of carbon dioxide by surface reactions has been investigated experimentally in conditions close to those encountered in the interstellar medium. Carbon monoxide and oxygen atoms have been concurrently deposited on a copper substrate at 5 K. The formation and release in the gas phase of carbon dioxide have been monitored by a mass spectrometer during a programmed desorption. Our measured rates and energy barrier show that it is possible to make CO2 efficiently in ice mantles on grains without the intervention of energizing (UV or energetic particles) agents. Subject headings: dust, extinction - ISM: abundances - ISM: molecules - methods: laboratory -molecular processes.",

author = "Roser, {Joe E.} and Gianfranco Vidali and Giulio Manic{\`o} and Valerio Pirronello",

note = "Funding Information: We thank Giuseppe Ragun{\`i} for helpful discussions. We acknowledge financial support from NASA through grants NAG5-6822 and NAG5-9093 to G. V. and from the Italian Ministry for University and Scientific Research through grant 21043088 to V. P.",

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T1 - Formation of carbon dioxide by surface reactions on ices in the interstellar medium

AU - Roser, Joe E.

AU - Vidali, Gianfranco

AU - Manicò, Giulio

AU - Pirronello, Valerio

N1 - Funding Information: We thank Giuseppe Ragunì for helpful discussions. We acknowledge financial support from NASA through grants NAG5-6822 and NAG5-9093 to G. V. and from the Italian Ministry for University and Scientific Research through grant 21043088 to V. P.

PY - 2001/7/1

Y1 - 2001/7/1

N2 - The formation of carbon dioxide by surface reactions has been investigated experimentally in conditions close to those encountered in the interstellar medium. Carbon monoxide and oxygen atoms have been concurrently deposited on a copper substrate at 5 K. The formation and release in the gas phase of carbon dioxide have been monitored by a mass spectrometer during a programmed desorption. Our measured rates and energy barrier show that it is possible to make CO2 efficiently in ice mantles on grains without the intervention of energizing (UV or energetic particles) agents. Subject headings: dust, extinction - ISM: abundances - ISM: molecules - methods: laboratory -molecular processes.

AB - The formation of carbon dioxide by surface reactions has been investigated experimentally in conditions close to those encountered in the interstellar medium. Carbon monoxide and oxygen atoms have been concurrently deposited on a copper substrate at 5 K. The formation and release in the gas phase of carbon dioxide have been monitored by a mass spectrometer during a programmed desorption. Our measured rates and energy barrier show that it is possible to make CO2 efficiently in ice mantles on grains without the intervention of energizing (UV or energetic particles) agents. Subject headings: dust, extinction - ISM: abundances - ISM: molecules - methods: laboratory -molecular processes.

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Formation of carbon dioxide by surface reactions on ices in the interstellar medium

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