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Title:
Detection of a new interstellar molecule, H2CN
Authors:
Ohishi, Masatoshi; McGonagle, Douglas; Irvine, William M.; Yamamoto, Satoshi; Saito, Shuji
Affiliation:
AA(Nobeyama Radio Observatory, Nobeyama, Japan), AB(Nobeyama Radio Observatory, Nobeyama, Japan), AC(University of Massachusetts, Amherst, MA, US), AD(University of Massachusetts, Amherst, MA, US), AE(Inst. for Molecular Science, Myodaiji, Okazaki, Japan)
Publication:
Astrophysical Journal, Part 2 - Letters, vol. 427, no. 1, p. L51-L54 (ApJL Homepage)
Publication Date:
05/1994
Category:
Astronomy
Origin:
STI
NASA/STI Keywords:
Abundance, Carbon Compounds, Interstellar Matter, Methylene, Molecular Clouds, Radio Astronomy, Radio Spectra, Rotational Spectra, Astronomical Observatories, High Resolution, Radio Telescopes
DOI:
10.1086/187362
Bibliographic Code:
1994ApJ...427L..51O

Abstract

We have detected a new interstellar molecule, H2CN (methylene amidogen), in the cold, dark molecular cloud TMC-1. The column density of H2CN is estimated to be approximately 1.5 x 1011 cm-2 by assuming an excitation temperature of 5 K. This column density corresponds to a fractional abundance relative to H2 of approximately 1.5 x 10-11. This value is more than three orders of magnitude less than the abundance of the related molecule HCN in TMC-1. We also report a tentative detection of H2CN in Sgr B2(N). The formation mechanism of H2CN is discussed. Our detection of the N2CN molecule may suggest the existence of a new series of carbon-chain molecules, CH2C(n)N (N = 0, 1, 2, ...).

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