Radiation Effects in Water Ice in the Outer Solar System

Baragiola, R. A.; Famá, M.; Loeffler, M. J.; Palumbo, M. E.; Raut, U.; Shi, J.; Strazzulla, G.

doi:10.1007/978-1-4614-3076-6_16

Cited by 17 publications

(14 citation statements)

References 96 publications

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“…The mW model has been used to study ice crystallization and amorphous ices (Moore & Molinero, , ). This is of particular importance to this study, since ices in astrophysical environments may be amorphous (Baragiola, ; Baragiola et al, ) with complex structures (Soper, ).…”

Section: Methodsmentioning

confidence: 99%

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Nietiadi

Umstätter

Alhafez

et al. 2017

Geophysical Research Letters

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Collisions between ice grains are ubiquitous in the outer solar system. The mechanics of such collisions is traditionally described by the elastic contact theory of adhesive spheres. Here we use molecular dynamics simulations to study collisions between nanometer-sized amorphous water ice grains. We demonstrate that the collision-induced heating leads to grain melting in the interface of the colliding grains. The large lateral deformations and grain sticking induced considerably modify available macroscopic collision models. We report on systematic increases of the contact radius, strong grain deformations, and the prevention of grain bouncing.

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Section: Methodsmentioning

confidence: 99%

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Nietiadi

Umstätter

Alhafez

et al. 2017

Geophysical Research Letters

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“…This could be the explanation for the suggested presence here of some ices that were not detected in previous spectral studies, as in 1999TC 36 and 1996 GQ 21 , or differ from the previously detected ones, e.g., for Sedna and Pholus. Furthermore, light probing more transparent spectral regions may well sample depths of centimeters or more, while light crossing darker spectral regions may instead sample shallower layers, of the order of microns or less (Baragiola et al, 2013). Different layers could have different compositions.…”

Section: General Considerationsmentioning

confidence: 98%

The composition of “ultra-red” TNOs and centaurs

Ore

Barucci

Emery

et al. 2015

Icarus

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“…Similar effects were obtained for a methanol ice by Chen et al (2013), with even larger differences in the product efficiencies between monochromatic (550 eV) and broadband fluxes. The situation is reminiscent of the case of extreme-ultraviolet photoprocessing, in which products saturate at very high irradiation rates (e.g., Baragiola et al 2013). In order to get insights on the low efficiency of the HBB irradiation,we will compare the three BB experiments with the same infrared-to-X-rayspot size ratio, i.e., ∼1.9, since their products are underestimated by the same factor.…”

Section: Saturation Of Productsmentioning

confidence: 99%

Chemical Evolution of a Co Ice Induced by Soft X-Rays

Ciaravella

Chen

Cecchi‐Pestellini

et al. 2016

ApJ

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We irradiated a pure carbon monoxide ice with soft X-rays of energies up to 1.2 keV. The experiments were performed using the spherical grating monochromator beamline at the National Synchrotron Radiation Research Center in Taiwan, exploiting both monochromatic (at 0.3 and 0.55 keV) and broader energy (0.25-1.2 keV) fluxes. The infrared spectra of the irradiated ices showed the formation of a number of products such as polycarbon monoand dioxides C n O m , and chains containing up to 10 carbon atoms. While a gentle increase in the energy absorbed by the ice sample is reflected by an increase in the column densities of newly born species, such correlation breaks down at very high fluxes. In this regime the production yield falls down sharply by about a factor of 100. The refractory residue obtained in the broad energy irradiation is a "compromise" between those obtained with proton irradiation of C 3 O 2 and CO ices in previous experiments. Finally, we discuss the possible implications for space chemistry

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Radiation Effects in Water Ice in the Outer Solar System

Cited by 17 publications

References 96 publications

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

Collision‐Induced Melting in Collisions of Water Ice Nanograins: Strong Deformations and Prevention of Bouncing

The composition of “ultra-red” TNOs and centaurs

Chemical Evolution of a Co Ice Induced by Soft X-Rays

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