detalle del documento
IDENTIFICACIÓN
oai:arXiv.org:2412.06397
Tema
Astrophysics - Astrophysics of Gal...Autor
Lu, Yang Quan, Donghui Chang, Qiang Chen, Long-Fei Li, DiCategoría
ciencias: astrofísica
Año
2024
fecha de cotización
11/12/2024
Palabras clave
formation cold oxygen-bearing coms mechanismsResumen
In recent years, a significant number of oxygen-bearing complex organic molecules (COMs) have been detected in the gas phase of cold dark clouds such as TMC-1.
The formation of these COMs cannot be explained by diffusive mechanisms on grains and gas phase reactions.
This study investigates the formation of oxygen-bearing COMs in cold dark clouds using multiphase gas-grain models that incorporate cosmic ray-induced non-diffusive radiation chemistry and non-thermal sputtering desorption mechanisms.
Additionally, we present the effects of varying elemental C/O ratio and different sputtering rates.
We utilized an accelerated Gillespie algorithm, based on the regular Gillespie algorithm.
The results of our models for dimethyl ether (CH3OCH3), methyl formate (HCOOCH3), acetaldehyde (CH3CHO), ethanol (C2H5OH), and methanol (CH3OH) show reasonable agreement with observations toward TMC-1, within a factor of 3.
Out of the 94 species compared with observations, 63 show agreement within 1 order of magnitude, accounting for 67.02%.
Overall inclusion of non-thermal mechanisms in multi-phase models shows notable improvement of modeling on oxygen-bearing COMs in the interstellar medium.
Lu, Yang,Quan, Donghui,Chang, Qiang,Chen, Long-Fei,Li, Di, 2024, Modeling Complex Organic Molecules Formation in Cold Cores: Multi-phase Models with Non-thermal Mechanisms
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