English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

Chemical models and experiments indicate that interstellar dust grains andtheir ice mantles play an important role in the production of complex organicmolecules (COMs). To date, the most complex solid-phase molecule detected withcertainty in the ISM is methanol, but the James Webb Space Telescope (JWST) maybe able to identify still larger organic species. In this study, we use acoupled chemo-dynamical model to predict new candidate species for JWSTdetection toward the young star-forming core Cha-MMS1, combining the gas-grainchemical kinetic code MAGICKAL with a 1-D radiative hydrodynamics simulationusing Athena++. With this model, the relative abundances of the main iceconstituents with respect to water toward the core center match well withtypical observational values, providing a firm basis to explore the icechemistry. Six oxygen-bearing COMs (ethanol, dimethyl ether, acetaldehyde,methyl formate, methoxy methanol, and acetic acid), as well as formic acid,show abundances as high as, or exceeding, 0.01% with respect to water ice.Based on the modeled ice composition, the infrared spectrum is synthesized todiagnose the detectability of the new ice species. The contribution of COMs toIR absorption bands is minor compared to the main ice constituents, and theidentification of COM ice toward the core center of Cha-MMS1 with the JWSTNIRCAM/Wide Field Slitless Spectroscopy (2.4-5.0 micron) may be unlikely.However, MIRI observations (5-28 micron) toward COM-rich environments wheresolid-phase COM abundances exceed 1% with respect to the water ice columndensity might reveal the distinctive ice features of COMs.

Ice Age : Chemo-dynamical modeling of Cha-MMS1 to predict new solid-phase species for detection with JWST