J/ApJ/783/L5ivo://CDS.VizieR/J/ApJ/783/L5doi:10.26093/cds/vizier.17839005CDSCueto M.Cernicharo J.Barlow M.J.Swinyard B.M.Herrero V.J.,Tanarro I.Domenech J.L.2017-01-23T22:00:00Z2016-04-18T14:21:23ZCDS support team

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

cds-question@unistra.fratomic-physicsThe protonated argon ion, ^36^ArH^+^, was recently identified in the Crab Nebula from Herschel spectra. Given the atmospheric opacity at the frequency of its J=1-0 and J=2-1 rotational transitions (617.5 and 1234.6GHz, respectively), and the current lack of appropriate space observatories after the recent end of the Herschel mission, future studies on this molecule will rely on mid-infrared observations. We report on accurate wavenumber measurements of ^36^ArH^+^ and ^38^ArH^+^ rotation-vibration transitions in the v=1-0 band in the range 4.1-3.7{mu}m (2450-2715/cm). The wavenumbers of the R(0) transitions of the v=1-0 band are 2612.50135+/-0.00033 and 2610.70177+/-0.00042/cm(+/-3{sigma}) for ^36^ArH^+^ and ^38^ArH^+^, respectively. The calculated opacity for a gas thermalized at a temperature of 100K and with a linewidth of 1km/s of the R(0) line is 1.6x10^-15^xN(^36^ArH^+^). For column densities of ^36^ArH^+^ larger than 1x10^13^/cm^2^, significant absorption by the R(0) line can be expected against bright mid-IR sources.2014ApJ...783L...5Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/783/L5CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/799/115 : Absorption spectrum of SO up to 2.5THz (Martin-Drumel+, 2015)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/783/L5https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/783/L5http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/783/L5https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/783/L5https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/783/L5http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/783/L5GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/783/L5/table3Measured and calculated ro-vibrational transitions of the isotopologues of ArH^+^recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIsoIsotopologue (^36^ArD^+^, ^36^ArH^+^, ^38^ArD^+^, ^38^ArH^+^, ^40^ArD^+^, or ^40^ArH^+^)meta.id;phys.molJ'[0/36] Upper level J quantum number J_u_instr.det.qeintJ"[0/35] Lower level J quantum number J_l_instr.det.qeintv'[0/7] Upper level vibrational state v_u_phys.mol.qnintv"[0/6] Lower level vibrational state v_l_phys.mol.qnintx_Freq1Frequency units (MHz or cm^-1^) (1)meta.unitFreq1[404/1.33e+07] Observed frequency {nu}_obs_em.freqdoublee_Freq1[0/50] The 1{sigma} uncertainty in Freq1 (2)stat.errordoubleFreq2[404/1.3311e+07] Predicted frequency {nu}_cal_em.freqdoublee_Freq2[2e-05/6.6] The 1{sigma} uncertainty in Freq2stat.errordoubleO-C[-54/30] The {nu}_obs_-{nu}_cal_ differencestat.fit.residualdoubleRef[1/9] Reference code (3)meta.noteint