Cosmic-ray sputtering of interstellar ices in the electronic regime - Archive ouverte HAL
Article Dans Une Revue Astronomy and Astrophysics - A&A Année : 2023

Cosmic-ray sputtering of interstellar ices in the electronic regime

Résumé

Aims. With this article, we aim to provide the sputtering yields for molecular species of potential astrophysical interest and in the electronic regime of interaction characteristic of cosmic rays. We specifically target molecules that are constitutive of interstellar ice mantles. Methods. We used a compendium of existing data on electronic sputtering to calculate the prefactors leading to the generalisation of the stopping-power-dependent sputtering yield for many species condensing at low temperature. In addition, we present new experimental results to constrain the yield for solid CH4, C6, and CH3CN. Results. Electronic sputtering is constrained using literature data for H2, HD, D2, Ne, N2, CO, Ar, O2, Kr, Xe, CO2, SO2, NH3, S, H2O, D2O, CH3OH, Leucine, C20H12, C24H12, and C60. A first-order relation with the sublimation enthalpy is derived, which allows us to predict the sputtering yield within an order of magnitude for most species. The fluctuations around the mean are partly assignable to the differences in resilience towards radiolysis for individual species, and partly to the micro-physics details of the energy transfer to the lattice.

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Astrophysique [astro-ph]
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https://hal.science/hal-04094799

Soumis le : samedi 13 mai 2023-07:55:25

Dernière modification le : mercredi 30 octobre 2024-13:38:12

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hal-04094799 , version 1 (13-05-2023)

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E. Dartois, M Chabot, C.A.P da Costa, T Nguyen, J Rojas, et al.. Cosmic-ray sputtering of interstellar ices in the electronic regime. Astronomy and Astrophysics - A&A, 2023, 671, pp.A156. ⟨10.1051/0004-6361/202245383⟩. ⟨hal-04094799⟩

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