Interstellar CH3CCD

Details Interstellar CH3CCD Interstellar CH3CCD

Jul 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005apj...627l.117m&link_type=abstract

The Astrophysical Journal, Volume 627, Issue 2, pp. L117-L120.

Astronomy and Astrophysics

Astronomy

3

Ism: Abundances, Ism: Individual: Name: Taurus Molecular Cloud, Ism: Molecules

Scientific paper

We report the detection of a new interstellar molecule: CH3CCD, a deuterated isotopomer of methyl acetylene. Analysis of lines detected at seven positions along the ridge of the dark cloud TMC-1 indicates that the CH3CCD column density and fractionation exhibit strong spatial gradients, with D/H ratios ranging from a minimum of 0.04 at the cyanopolyyne peak (CP) position to as high as 0.18. We find that the column density in CH2DCCH is almost constant along the ridge, whereas that of CH3CCD increases and that of CH3CCH decreases in moving away from the CP. Chemical mechanisms that may explain the observed fractionation trends in CH3CCD and CH2DCCH are briefly discussed.

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