First detection of the ground-state J(K) = 1(0)-0(0) submillimeter transition of interstellar ammonia
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چکیده
منابع مشابه
Unraveling the 10 micron "silicate" feature of protostars: the detection of frozen interstellar ammonia.
We present infrared spectra of four embedded protostars in the 750-1230 cm-1 (13.3-8.1 microns) range. For NGC 7538 IRS 9, a new band is reported at 1110 cm-1 (9.01 microns, and several others may be present near 785, 820, 900, 1030, and 1075 cm-1 (12.7, 12.2, 11.1, 9.71, and 9.30 microns). The band 1110 cm-1 is attributed to frozen NH3. Its position and width imply that the NH3 is frozen in...
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Interstellar Triply Deuterated Ammonia
Research on interstellar ND3 is reviewed and updated from the discovery papers. Results from observations of a dozen sources at centimeter and submillimeter wavelengths are presented. The two data sets are consistent, but do not constrain the excitation conditions in the ND3emitting gas. The column density ratios of NH3/NH2D, NH2D/ND2H and ND3/ND2H, observed in similar sized beams, are ≈10, and...
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ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 1983
ISSN: 0004-637X,1538-4357
DOI: 10.1086/184086