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Interstellar molecules

B E Turner

    Journal of Molecular Evolution
    |May 1, 1980
    PubMed
    Summary
    This summary is machine-generated.

    Interstellar molecules reveal conditions in dense cosmic clouds and offer insights into galactic chemistry. Their study helps estimate the carbon isotope ratio, aligning with models of stellar nucleosynthesis.

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    Area of Science:

    • Astrochemistry
    • Interstellar Medium Physics

    Background:

    • Interstellar molecules serve as probes of physical conditions in cold, dense cosmic environments.
    • The interstellar medium (ISM) comprises various components with distinct physical properties.

    Purpose of the Study:

    • To review recent advancements in interstellar molecule research, focusing on physical probing and chemical processes.
    • To discuss gas-phase, shock, and grain surface chemistry in interstellar clouds.
    • To explore chemical isotope fractionation and its implications for cosmology and galactic nucleosynthesis.

    Main Methods:

    • Summarizing physical properties of ISM components.
    • Analyzing recent observational data on interstellar molecules.
    • Reviewing theoretical models of gas-phase, shock, and grain surface chemistry.

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    Main Results:

    • Ion-molecule reactions are confirmed for simple interstellar species.
    • Deuterium observations in interstellar molecules do not support cosmological conclusions.
    • Observations of 13C in interstellar molecules provide a 12C/13C ratio consistent with galactic nucleosynthesis models.

    Conclusions:

    • Interstellar molecule studies offer insights into ISM physical conditions and galactic chemical evolution.
    • While surface reactions are not currently observed, they cannot be excluded.
    • The study of interstellar molecules may provide links to the early solar system's molecular history.