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Newly detected molecules in dense interstellar clouds.

W M Irvine1, L W Avery, P Friberg

  • 1FCRAO, University of Massachusetts, Amherst 01003, USA.

Astrophysical Letters & Communications
|January 1, 1988
PubMed
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Recent astronomical observations have identified new interstellar molecules like C2S and PN in cold clouds and star-forming regions. These discoveries expand our understanding of astrochemistry and the chemical complexity of space.

Area of Science:

  • Astrochemistry
  • Radio Astronomy
  • Interstellar Medium

Background:

  • The chemical composition of interstellar clouds provides insights into star and planet formation.
  • Previous studies have identified numerous molecules in various interstellar environments.
  • The search for new molecules is crucial for understanding chemical evolution in space.

Purpose of the Study:

  • To report the identification of novel interstellar molecules.
  • To investigate the chemical inventory of the cold, dark cloud TMC-1 and the Orion plateau source.
  • To expand the known list of molecules present in the interstellar medium.

Main Methods:

  • Utilizing radio astronomy observations to detect molecular spectral lines.
  • Analyzing observational data to identify the unique signatures of specific molecules.
Keywords:
NASA Discipline ExobiologyNASA Discipline Number 52-10NASA Program ExobiologyNon-NASA Center

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  • Comparing observed spectra with laboratory data for molecule identification.

    • Main Results:

    • Identification of new interstellar molecules: C2S, C3S, C5H, C6H, and likely HC2CHO in TMC-1.
    • Discovery of the first interstellar phosphorus-containing molecule, PN, in the Orion plateau source.
    • Detection of 13C3H2, C3HD, and formic acid (HCOOH) in cold interstellar clouds.

    Conclusions:

    • The interstellar medium contains a richer and more complex chemical inventory than previously known.
    • These new molecular discoveries offer valuable probes for studying physical conditions in interstellar clouds.
    • The presence of molecules like PN and HCOOH highlights diverse chemical pathways in star-forming regions.