Confirmation of interstellar N2H/+/

Details Confirmation of interstellar N2H/+/ Confirmation of interstellar N2H/+/

Oct 1975

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975apj...201l..25t&link_type=abstract

Astrophysical Journal, vol. 201, Oct. 1, 1975, pt. 2, p. L25-L26.

Astronomy and Astrophysics

Astrophysics

32

Atomic Energy Levels, Hyperfine Structure, Interstellar Matter, Line Spectra, Microwave Emission, Nitrogen Hydrides, Astronomical Spectroscopy, Emission Spectra, H Ii Regions, Molecular Ions, Pressure Broadening, Radio Emission, Spectral Line Width, Spectral Resolution, Spectrum Analysis, Spin-Orbit Interactions

Scientific paper

The proposed identification of the triplet of interstellar lines recently discovered at 93.174 GHz with the molecular ion N2H(+) is confirmed by resolving the predicted hyperfine structure of the inner nitrogen nucleus in the narrow-line molecular source OMC-2 in the Orion Nebula. The hyperfine constants of N2H(+) are derived from the observational data, and the rest center frequency of the J = 1-0 rotational transition is determined. It is noted that the full width at half-maximum of the weakest line (F1 = 0-1) is only 230 kHz (0.74 km/sec in radial velocity), making it the narrowest molecular emission line (excluding maser point sources) thus far observed in the direction of a H II region or IR source.

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