J/ApJS/233/15ivo://CDS.VizieR/J/ApJS/233/15doi:10.26093/cds/vizier.22330015CDSMelosso M.Degli Esposti C.Dore L.2018-05-14T08:38:35Z2018-02-22T09:34:54ZCDS support team

CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France

cds-question@unistra.fratomic-physicsradio-spectroscopymolecular-physicsThe deuteration mechanism of molecules in the interstellar medium is still being debated. Observations of deuterium-bearing species in several astronomical sources represent a powerful tool to improve our understanding of the interstellar chemistry. The doubly deuterated form of the astrophysically interesting amidogen radical could be a target of detection in space. In this work, the rotational spectrum of the ND_2_ radical in its ground vibrational and electronic X^2^B_1_ state has been investigated between 588 and 1131GHz using a frequency modulation millimeter/submillimeter-wave spectrometer. The ND_2_ molecule has been produced in a free-space glass absorption cell by discharging a mixture of ND_3_ and Ar. Sixty-four new transition frequencies involving J values from 2 to 5 and K_a_ values from 0 to 4 have been measured. A global analysis including all the previous field-free pure rotational data has been performed, allowing for a more precise determination of a very large number of spectroscopic parameters. Accurate predictions of rotational transition frequencies of ND_2_ are now available from a few gigahertz up to several terahertz.2017ApJS..233...15Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/233/15CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/820/L26 : J=1-0 transitions of argonium (ArH^+^) (Bizzocchi+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/233/15https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/233/15http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/233/15https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/233/15https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/233/15http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/233/15GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapRadiodefaultJ/ApJS/233/15/table2Observed transition frequencies of ND_2_recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintNup[1/13] Upper N quantum numberphys.atmol.qnintKaup[0/10] Upper Ka quantum numberphys.mol.qnintKcup[0/12] Upper Kc quantum numberphys.mol.qnintJup[1/14] Upper J quantum numberphys.atmol.qnintF1up[1/9]? Upper F1 quantum number (1)phys.atmol.qnintnullableIDup[0/2]? Upper ID quantum number (1)phys.atmol.qnintnullableFup[1/11]? Upper F quantum number (1)phys.atmol.qnintnullableNlo[0/12] Lower N quantum numberphys.atmol.qnintKalo[0/9] Lower Ka quantum numberphys.mol.qnintKclo[0/11] Lower Kc quantum numberphys.mol.qnintJlo[1/13] Lower J quantum numberphys.atmol.qnintF1lo[1/10]? Lower F1 quantum number (1)phys.atmol.qnintnullableIDlo[0/2]? Lower ID quantum number (1)phys.atmol.qnintnullableFlo[1/12]? Lower F quantum number (1)phys.atmol.qnintnullableFreq[102.5/1131081] Experimental rest frequency (2)MHzem.freqdoublee_Freq[0.0007/1] Estimated uncertainties of the rest frequency (2)MHzstat.errorfloatO-C[-1.3/1.4] Observed minus calculated value (2)MHzstat.fit.residualdoubleWeight[0.0002/1]? Relative weight for blended linesphys.atmol.weightfloatnullableRefReference (3)meta.ref;pos.framechar