Detection of new interstellar transitions of H, OCS, and H2CO and a search for interstellar fluorine

Astronomy and Astrophysics – Astronomy

Scientific paper

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Fluorine Compounds, Interstellar Radiation, Line Spectra, Microwave Spectra, Radio Sources (Astronomy), Spectrum Analysis, Abundance, Emission Spectra, Interstellar Matter, Millimeter Waves, Radio Telescopes

Scientific paper

The paper reports the detection of interstellar line emission from hydrogen, OCS, H2CO, and CH3OH in Orion A, Sgr B2(OH), W51, M17 SW, and NGC 2264, 6334N(OH), and 7538. The detected transitions include H50-alpha, the J = 4-3 transition of OCS, the J(K-K+) = 4(13)-4(14) transition of H2CO, and the 48-GHz transition of CH3OH. The H2CO emission feature observed in the Orion A spectrum is shown to confirm the detection of the interstellar J = 4 K-doublet. An unsuccessful search for interstellar FCN and CH3F in W3(OH), Orion A, NGC 2264, and Sgr B2(OH) is also discussed.

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