Observation of the 6/16/-5/15/ transitions of acetaldehyde in Sagittarius B2

Astronomy and Astrophysics – Astronomy

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Acetaldehyde, Electron Transitions, Interstellar Gas, Molecular Spectra, Radio Sources (Astronomy), Energy Transfer, Interstellar Radiation, Line Spectra, Molecular Energy Levels, Molecular Rotation, Spectral Line Width

Scientific paper

The 6(16)-5(15) transitions of acetaldehyde have been observed in the Sgr B2 molecular cloud. The large line width suggests that both the A and E symmetry states are present with essentially equal intensity. This is the first observation of acetaldehyde at millimeter wavelengths, and the intensity indicates that many other millimeter-wave lines of acetaldehyde should be detectable.

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