Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles: Peeling an Icy Onion...

Demian Marchione, Alexander Rosu-Finsen, Ali Ghith Moussa Abdulgalil, John Thrower, Victoria Frankland, Mark P. Collings, Martin R. S. McCoustra

Research output: Contribution to conferencePaper

Abstract

A synthesis observations from laboratory studies on the thermal and non-thermal physics and chemistry of dust grains as they evolve from diffuse to dense environments in the interstellar medium will be presented. We will specifically report on (1) thermal desorption and the impact of surface heterogeneity; (2) agglomeration of water (H2O) on an amorphous silica (aSiO2) surface; (3) highly efficient electron-promoted desorption of weakly bound adsorbates from H2O ice surfaces; (4) photo-desorption from H2O ice surfaces at ultraviolet wavelengths in the 200 to 300 nm range; and (5) efficient molecular hydrogen (H2) generation from ionisation of reduced carbon-containing species. The conclusion drawn from this synthesis is that the onion model of icy grain mantles needs revision.

Conference

ConferencePhysique et Chimie du Milieu Interstellaire 2018
Abbreviated titlePCMI-2018
CountryFrance
CityMarseille
Period25/06/1829/06/18
Internet address

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mantle
desorption
ice
agglomeration
ionization
physics
silica
hydrogen
dust
wavelength
electron
laboratory
carbon
water

Cite this

Marchione, D., Rosu-Finsen, A., Abdulgalil, A. G. M., Thrower, J., Frankland, V., Collings, M. P., & McCoustra, M. R. S. (2018). Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles: Peeling an Icy Onion... . 11. Paper presented at Physique et Chimie du Milieu Interstellaire 2018, Marseille, France.
Marchione, Demian ; Rosu-Finsen, Alexander ; Abdulgalil, Ali Ghith Moussa ; Thrower, John ; Frankland, Victoria ; Collings, Mark P. ; McCoustra, Martin R. S. / Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles : Peeling an Icy Onion... . Paper presented at Physique et Chimie du Milieu Interstellaire 2018, Marseille, France.1 p.
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abstract = "A synthesis observations from laboratory studies on the thermal and non-thermal physics and chemistry of dust grains as they evolve from diffuse to dense environments in the interstellar medium will be presented. We will specifically report on (1) thermal desorption and the impact of surface heterogeneity; (2) agglomeration of water (H2O) on an amorphous silica (aSiO2) surface; (3) highly efficient electron-promoted desorption of weakly bound adsorbates from H2O ice surfaces; (4) photo-desorption from H2O ice surfaces at ultraviolet wavelengths in the 200 to 300 nm range; and (5) efficient molecular hydrogen (H2) generation from ionisation of reduced carbon-containing species. The conclusion drawn from this synthesis is that the onion model of icy grain mantles needs revision.",
author = "Demian Marchione and Alexander Rosu-Finsen and Abdulgalil, {Ali Ghith Moussa} and John Thrower and Victoria Frankland and Collings, {Mark P.} and McCoustra, {Martin R. S.}",
year = "2018",
month = "6",
day = "25",
language = "English",
pages = "11",
note = "Physique et Chimie du Milieu Interstellaire 2018, PCMI-2018 ; Conference date: 25-06-2018 Through 29-06-2018",
url = "https://pcmimarseille18.sciencesconf.org/",

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Marchione, D, Rosu-Finsen, A, Abdulgalil, AGM, Thrower, J, Frankland, V, Collings, MP & McCoustra, MRS 2018, 'Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles: Peeling an Icy Onion... ' Paper presented at Physique et Chimie du Milieu Interstellaire 2018, Marseille, France, 25/06/18 - 29/06/18, pp. 11.

Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles : Peeling an Icy Onion... . / Marchione, Demian; Rosu-Finsen, Alexander; Abdulgalil, Ali Ghith Moussa; Thrower, John; Frankland, Victoria; Collings, Mark P.; McCoustra, Martin R. S.

2018. 11 Paper presented at Physique et Chimie du Milieu Interstellaire 2018, Marseille, France.

Research output: Contribution to conferencePaper

TY - CONF

T1 - Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles

T2 - Peeling an Icy Onion...

AU - Marchione, Demian

AU - Rosu-Finsen, Alexander

AU - Abdulgalil, Ali Ghith Moussa

AU - Thrower, John

AU - Frankland, Victoria

AU - Collings, Mark P.

AU - McCoustra, Martin R. S.

PY - 2018/6/25

Y1 - 2018/6/25

N2 - A synthesis observations from laboratory studies on the thermal and non-thermal physics and chemistry of dust grains as they evolve from diffuse to dense environments in the interstellar medium will be presented. We will specifically report on (1) thermal desorption and the impact of surface heterogeneity; (2) agglomeration of water (H2O) on an amorphous silica (aSiO2) surface; (3) highly efficient electron-promoted desorption of weakly bound adsorbates from H2O ice surfaces; (4) photo-desorption from H2O ice surfaces at ultraviolet wavelengths in the 200 to 300 nm range; and (5) efficient molecular hydrogen (H2) generation from ionisation of reduced carbon-containing species. The conclusion drawn from this synthesis is that the onion model of icy grain mantles needs revision.

AB - A synthesis observations from laboratory studies on the thermal and non-thermal physics and chemistry of dust grains as they evolve from diffuse to dense environments in the interstellar medium will be presented. We will specifically report on (1) thermal desorption and the impact of surface heterogeneity; (2) agglomeration of water (H2O) on an amorphous silica (aSiO2) surface; (3) highly efficient electron-promoted desorption of weakly bound adsorbates from H2O ice surfaces; (4) photo-desorption from H2O ice surfaces at ultraviolet wavelengths in the 200 to 300 nm range; and (5) efficient molecular hydrogen (H2) generation from ionisation of reduced carbon-containing species. The conclusion drawn from this synthesis is that the onion model of icy grain mantles needs revision.

M3 - Paper

SP - 11

ER -

Marchione D, Rosu-Finsen A, Abdulgalil AGM, Thrower J, Frankland V, Collings MP et al. Laboratory Studies of Thermal and Non-thermal Processes in and on Growing Icy Grain Mantles: Peeling an Icy Onion... . 2018. Paper presented at Physique et Chimie du Milieu Interstellaire 2018, Marseille, France.