Modeling the complex chemistry of hot cores in Sagittarius B2-North: Influence of environmental factors
Abstract
Sagittarius B2(N) is host to several hot cores (HCs) in the early stage of star formation, where complex organic molecules (COMs) are detected in the gas phase. Given its exposure to the extreme environment of the Galactic center region, Sgr B2(N) is an excellent target to study the impact of environmental factors on the production of COMs. We combined the analysis of 3mm ALMA data and chemical models to characterize and compare the physical structure and chemical composition of Sgr B2(N)'s HCs. We investigated how the cosmic-ray ionization rate (CRIR) and the minimum dust temperature during the prestellar phase (T_{min}) influence the production of COMs. We used COM abundances to constrain the CRIR and T_{min} by comparing the results of chemical models with the observations. Chemical models with T_{min}=15~K and a CRIR of 7×10^{-16} s^{-1} best reproduce the abundances observed toward Sgr B2(N)'s HCs.
- Publication:
-
SF2A-2019: Proceedings of the Annual meeting of the French Society of Astronomy and Astrophysics
- Pub Date:
- December 2019
- Bibcode:
- 2019sf2a.conf...69B
- Keywords:
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- ISM: molecules;
- astrochemistry;
- molecular processes;
- cosmic rays;
- stars:formation