Matches in SemOpenAlex for { <https://semopenalex.org/work/W3100250498> ?p ?o ?g. }
- W3100250498 endingPage "202" @default.
- W3100250498 startingPage "202" @default.
- W3100250498 abstract "The chemical structure of high-mass star nurseries is important for a general understanding of star formation. Deuteration is a key chemical process in the earliest stages of star formation because its efficiency is sensitive to the environment. Using the IRAM-30 m telescope at 1.3–4.3 mm wavelengths, we have imaged two parsec-scale high-mass protostellar clumps (P1 and S) that show different evolutionary stages but are located in the same giant filamentary infrared dark cloud G28.34+0.06. Deep spectral images at subparsec resolution reveal the dust and gas physical structures of both clumps. We find that (1) the low-J lines of N2H+, HCN, HNC, and HCO+ isotopologues are subthermally excited; and (2) the deuteration of N2H+ is more efficient than that of HCO+, HCN, and HNC by an order of magnitude. The deuterations of these species are enriched toward the chemically younger clump S compared with P1, indicating that this process favors the colder and denser environment (Tkin ∼ 14 K, N(NH3) ∼ 9 × 1015 cm−2). In contrast, single deuteration of NH3 is insensitive to the environmental difference between P1 and S; and (3) single deuteration of CH3OH (>10%) is detected toward the location where CO shows a depletion of ∼10. This comparative chemical study between P1 and S links the chemical variations to the environmental differences and shows chemical similarities between the early phases of high- and low-mass star-forming regions." @default.
- W3100250498 created "2020-11-23" @default.
- W3100250498 creator A5053233591 @default.
- W3100250498 creator A5062209257 @default.
- W3100250498 creator A5063797843 @default.
- W3100250498 creator A5064727266 @default.
- W3100250498 creator A5090718980 @default.
- W3100250498 creator A5091374050 @default.
- W3100250498 date "2019-10-04" @default.
- W3100250498 modified "2023-10-13" @default.
- W3100250498 title "The Chemical Structure of Young High-mass Star-forming Clumps. I. Deuteration" @default.
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