Skip to main content
Go to the home page of the European Commission (opens in new window)
English en
CORDIS - EU research results
CORDIS

ORCHID: Organic Reactions through Carbon addition to H2 on Interstellar Dust grains

Project description

Hydrogen’s role in formation and evolution of interstellar complex organic molecules

Recent studies of star and planet formation have highlighted the essential role astrochemistry plays in these processes to explain the formation of interstellar molecules. The solid-state chemistry involving molecular hydrogen (H2), the most abundant molecule in the universe, still remains unknown so far. With the support of the Marie Skłodowska-Curie Actions programme, the ORCHID project will investigate the role of H2 ice in the formation and evolution of interstellar complex organic molecules (COMs), exploring a neglected pathway of H2 reactions with carbon atoms. To do so, ORCHID will use cutting-edge experimental setups to better understand the data produced by state-of-the-art telescopes.

Objective

The recent progress in astrochemical studies of the molecular makeup of the Interstellar Medium (ISM) has revolutionized our understanding of the early phases of star and planet formation. A significant gap, however, still exists and that involves the role of molecular hydrogen (H2)—the most abundant molecule in the universe—in interstellar ice chemistry. ORCHID aims to fill this gap by investigating the impact of H2 on the formation and evolution of complex organic molecules (iCOMs) in the ISM. Given the lack of existing literature detailing solid-state reaction pathways incorporating H2, ORCHID hypothesizes that H2 reactions with carbon atoms is instrumental in unexplored chemical pathways for iCOMs formation. To achieve its objectives, ORCHID uses state-of-the-art experimental setups to produce quantitative data that aligns with the latest observations of interstellar ices from the James Webb Space Telescope (JWST) and gas-phase observations from radio-telescopes like the Atacama Large Millimeter/submillimeter Array (ALMA). Specifically, the project: (1) explores iCOMs formation through previously overlooked pathways involving H2, completing and extending reaction networks in the ISM; (2) generates accurate parameters for astrochemical models, facilitating simulations that match observations of star- and planet-forming regions; (3) investigates the conditions under which iCOMs are released into the gas phase, especially at temperatures where thermal desorption is not feasible in the ISM. The insights and data generated by ORCHID will serve as a robust foundation for interpreting ongoing and future astronomical observations. Moreover, the project will enrich existing gas-grain kinetic models, effectively bridging the grain-gas gap and thereby advancing our understanding of how chemical processes in the ISM influence the composition of celestial bodies in star- and planet-forming regions.

Fields of science (EuroSciVoc)

Keywords

Programme(s)

Topic(s)

Funding Scheme

HORIZON-TMA-MSCA-PF-EF - HORIZON TMA MSCA Postdoctoral Fellowships - European Fellowships

See all projects funded under this funding scheme

Call for proposal

(opens in new window) HORIZON-MSCA-2023-PF-01

See all projects funded under this call

Coordinator

UNIVERSITEIT LEIDEN
Net EU contribution
€ 187 624,32
Address
RAPENBURG 70
2311 EZ Leiden
Netherlands
Activity type
Higher or Secondary Education Establishments
Links
Total cost
No data