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Related Experiment Videos

Tricarbon monoxide in TMC-1.

R D Brown1, P D Godfrey, D M Cragg

  • 1Chemistry Department, Monash University.

The Astrophysical Journal
|October 1, 1985
PubMed
Summary
This summary is machine-generated.

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Researchers detected new carbon trioxide (C3O) lines in TMC-1, finding its abundance consistent with gas-phase ion-molecule reactions. This discovery aids in understanding interstellar chemistry.

Area of Science:

  • Astrochemistry
  • Radio Astronomy
  • Molecular Spectroscopy

Background:

  • Interstellar clouds are key sites for complex molecule formation.
  • Understanding the abundance and formation pathways of molecules like carbon trioxide (C3O) is crucial for astrochemistry.

Purpose of the Study:

  • To report the measurement of new C3O spectral lines in the TMC-1 molecular cloud.
  • To determine the fractional abundance of C3O in TMC-1 and compare it with theoretical models.

Main Methods:

  • Utilized radio telescope observations to detect C3O spectral lines.
  • Applied large velocity gradient (LVG) radiative transfer models to interpret observed line intensities.
  • Performed negative searches for C3O in other astronomical sources.

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Main Results:

  • Successfully measured three new lines of C3O in TMC-1.
  • Observed line temperatures align with LVG model predictions using standard cloud parameters.
  • Derived a fractional abundance of C3O as 1.4 x 10^-10, consistent with gas-phase ion-molecule reaction models.

Conclusions:

  • The measured C3O abundance in TMC-1 supports formation via gas-phase ion-molecule reactions.
  • The non-detection in other sources is consistent with their expected chemical conditions.