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Observational astrochemistry.

W M Irvine1, A Hjalmarson

  • 1Five College Radio Astronomy Observatory, University of Massachusetts, Amherst 01003, USA.

Advances in Space Research : the Official Journal of the Committee on Space Research (COSPAR)
|January 1, 1986
PubMed
Summary
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Astronomers found 70 interstellar molecules, mostly organic, including the first hydrocarbon ring. Studying their abundances in different cosmic environments aids understanding of star formation.

Area of Science:

  • Astrochemistry
  • Interstellar Medium Physics
  • Organic Chemistry

Background:

  • Over 70 molecular species identified in interstellar clouds and stellar envelopes.
  • Approximately 75% of these molecules are organic, with complex structures.
  • Key elements include H, C, N, O, S, Si, and Cl.

Purpose of the Study:

  • To determine accurate chemical abundances of interstellar molecules.
  • To investigate how these abundances vary with environmental conditions.
  • To link molecular composition to cloud evolution and star formation processes.

Main Methods:

  • Spectroscopic analysis of interstellar clouds and stellar envelopes.
  • Identification and quantification of molecular species.
  • Environmental characterization of observed regions.
Keywords:
NASA Discipline ExobiologyNASA Discipline Number 52-10NASA Program ExobiologyNon-NASA Center

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Main Results:

  • Identification of approximately 70 molecular species, with 75% being organic.
  • Discovery of complex organic molecules, including the first hydrocarbon ring, cyclopropenylidene (C3H2).
  • Variations in molecular abundances observed across different interstellar environments.

Conclusions:

  • Interstellar clouds exhibit both commonalities and unique chemical differences.
  • Molecular composition provides insights into the processes of cloud evolution.
  • Astrochemical studies are crucial for understanding the origins of star formation.