New 3 millimeter observations of interstellar HNO - Reinstating a discredited identification

Details New 3 millimeter observations of interstellar HNO - Reinstating a discredited identification New 3 millimeter observations of interstellar HNO - Reinstating a discredited identification

Jan 1993

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1993apj...403l..17s&link_type=abstract

Astrophysical Journal, Part 2 - Letters (ISSN 0004-637X), vol. 403, no. 1, p. L17-L20.

Astronomy and Astrophysics

Astrophysics

5

Free Radicals, Interstellar Matter, Nitrogen Compounds, Astronomical Spectroscopy, H Ii Regions, Molecular Clouds

Scientific paper

HNO has been observed in six interstellar clouds via its 1(01)-0(00) transition at 3 mm wavelength. L134N, W33A, W51M, and DR 21 are new HNO sources. The excellent agreement between laboratory and astronomical rest frequency in L134N is important for establishing the correctness of the astronomical assignment of this line. With the exception of Ori A, every known NO source contains detectable HNO. The typical column density ratio N(tot)(NO)/N(tot)(HNO) appears to be 100-200, except for L134N (about 800) and DR 21(OH) (about 20). These new HNO results correct several misconceptions in the current literature.

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