A novel framework to study the impact of binding energy distributions on the chemistry of dust grains

Abstract

The evaporation of molecules from dust grains is crucial to understand some key aspects of the star- and the planet-formation processes. During the warm-up phase the presence of young protostellar objects induces molecules to evaporate from the dust surface into the gas phase, enhancing its chemical complexity. Similarly, in circumstellar disks, the position of the so-called snow-lines is determined by evaporation, with important consequences for the formation of planets. The amount of molecules that are desorbed depends on the interaction between the species and the grain surface, which is controlled by the binding energy. Recent theoretical and experimental works point towards a distribution of values for this parameter instead of the single value often employed in astrochemical models.We present here a new "multi-binding energy" framework, to assess the effects that a distribution of binding energies has on the amount of species bound to the grains. We find that the efficiency of the surface chemistry is significantly influenced by this process with crucial consequences on the theoretical estimates of the desorbed species.

Accepted A&A

References in corpus (13)

• Evidence of fast pebble growth near condensation fronts in the HL Tau protoplanetary disk
• Binding energies: new values and impact on the efficiency of chemical desorption
• Formation of Complex Molecules in Prestellar Cores: a Multilayer Approach
• Atom addition reactions in interstellar ice analogues
• Formation of Complex Organic Molecules in Cold Interstellar Environments through non-diffusive grain-surface and ice-mantle chemistry
• Multilayer formation and evaporation of deuterated ices in prestellar and protostellar cores
• A new modified-rate approach for gas-grain chemical simulations
• Sensitivity analysis of grain surface chemistry to binding energies of ice species
• Reactivity of HCO with CH3 and NH2 on Water Ice Surfaces. A Comprehensive Accurate Quantum Chemistry Study
• On Simulating the Proton-Irradiation of O${}_2$ and H${}_2$O Ices Using Astrochemical-type Models, with Implications for Bulk Reactivity
• A three-phase approach to grain surface chemistry in protoplanetary disks: Gas, ice surfaces and ice mantles of dust grains
• Interplay of gas and ice during cloud evolution
• Chemistry in a forming protoplanetary disk: main accretion phase

Cited by in corpus (13)

• The Perseus ALMA Chemistry Survey (PEACHES). I. The Complex Organic Molecules in Perseus Embedded Protostars
• Binding Energy Evaluation Platform: A database of quantum chemical binding energy distributions for the astrochemical community
• Linking ice and gas in the Lambda Orionis Barnard 35A cloud
• In-Depth Exploration of Catalytic Sites on Amorphous Solid Water: I. The Astrosynthesis of Aminomethanol
• Robust Binding Energy Distribution Sampling on Amorphous Solid Water Models. Method testing and validation with NH3, CO and CH4
• Simulation of CH${}_3$OH ice UV photolysis under laboratory conditions
• Pathways to Interstellar Amides via Carbamoyl (NH2CO) Isomers by Radical-Neutral Reactions on Ice Grain Mantles
• A multigrain-multilayer astrochemical model with variable desorption energy for surface species
• CO Adsorption Sites on Interstellar Water Ices Explored with Machine Learning Potentials. Binding energy distributions and snowline
• A sensitivity analysis of interstellar ice chemistry in astrochemical models
• Role of NH3 Binding Energy in the Early Evolution of Protostellar Cores
• CO Diffusion on Interstellar Amorphous Solid Water: A Computational Study
• Using Statistical Emulation and Knowledge of Grain-Surface Diffusion for Bayesian Inference of Reaction Rate Parameters: An Application to a Glycine Network