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1 results

  • Unified Picture of Chemical Differentiation in Disk-Forming Regions of Low-Mass Protostellar Sources

  • Yoko Oya
  • Journal:
    Proceedings of the International Astronomical Union / Volume 14 / Issue S345 / August 2018
    Published online by Cambridge University Press:
    13 January 2020, pp. 111-114
    Print publication:
    August 2018
    • Article
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  • Young low-mass protostellar sources are known to show significant chemical diversity in their envelopes at a few 1000s au scale; two distinct cases are hot corino chemistry and warm carbon-chain chemistry (WCCC). It is of great interest how the chemical diversity is inherited to chemistry of disk-forming regions. With the recent ALMA observations, we found that the chemical diversity in envelopes is indeed delivered into the disk-forming regions at a 100 au scale. Moreover, the chemical composition changes drastically from envelopes to disks. We also found sources with the hybrid chemical characteristics; both hot corino chemistry and WCCC occur in spatially separated parts of a single source. This hybrid case may be a common occurrence, while hot corinos and WCCC sources are regarded as distinct cases. This unified view of chemistry in disk-forming regions will be an important clue to tracing the chemical evolution from protostellar cores to protoplanetary disks.