J/ApJS/232/19ivo://CDS.VizieR/J/ApJS/232/19doi:10.26093/cds/vizier.22320019CDSLiu X.Shemansky D.E.Yoshii J.Liu M.J.Johnson P.V.Malone C.P.,Khakoo M.A.2018-02-02T10:50:54Z2017-12-15T12:34:55ZCDS support team

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

cds-question@unistra.fratomic-physicsThe c^3^{Pi}_u_ state of the hydrogen molecule has the second largest triplet-state excitation cross-section, and plays an important role in the heating of the upper thermospheres of outer planets by electron excitation. Precise energies of the H_2_, D_2_, and HD c^3^{Pi}_u_^-^(v,N) levels are calculated from highly accurate ab initio potential energy curves that include relativistic, radiative, and empirical non-adiabatic corrections. The emission yields are determined from predissociation rates and refined radiative transition probabilities. The excitation function and excitation cross-section of the c^3^{Pi}_u_ state are extracted from previous theoretical calculations and experimental measurements. The emission cross-section is determined from the calculated emission yield and the extracted excitation cross-section. The kinetic energy (Ek) distributions of H atoms produced via the predissociation of the c^3^{Pi}_u_ state, the c^3^{Pi}_u_^-^-b^3^{Sigma}_u_^+^ dissociative emission by the magnetic dipole and electric quadrupole, and the c^3^{Pi}_u_-a^3^{Sigma}_g_^+^-b^3^{Sigma}_u_^+^ cascade dissociative emission by the electric dipole are obtained. The predissociation of the c^3^{Pi}_u_^+^ and c^3^{Pi}_u_^-^ states both produce H(1s) atoms with an average Ek of ~4.1eV/atom, while the c^3^{Pi}_u_^-^-b^3^{Sigma}_u_^+^ dissociative emissions by the magnetic dipole and electric quadrupole give an average Ek of ~1.0 and ~0.8eV/atom, respectively. The c^3^{Pi}_u_-a^3^{Sigma}_g_^+^-b^3^{Sigma}_u_^+^ cascade and dissociative emission gives an average Ek of ~1.3 eV/atom. On average, each H_2_ excited to the c^3^{Pi}_u_ state in an H_2_-dominated atmosphere deposits ~7.1eV into the atmosphere while each H_2_ directly excited to the a^3^{Sigma}_g_^+^ and d^3^{Pi}_u_ states contribute ~2.3 and ~3.3eV, respectively, to the atmosphere. The spectral distribution of the calculated continuum emission arising from the X^1^{Sigma}_g_^+^-c^3^{Pi}_u_ excitation is significantly different from that of direct a^3^{Sigma}_g_^+^ or d^3^{Pi}_u_ excitations.2017ApJS..232...19Lhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJS/232/19CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/818/120 : H_2_ d^3^{Pi}_u_ excitation by electron impact (Liu+, 2016)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJS/232/19https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJS/232/19http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJS/232/19https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJS/232/19https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJS/232/19http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJS/232/19GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJS/232/19/table4Non-adiabatic transition energies and vibrational overlap integrals of the X^1^{Sigma}_g_^+^(v_i_,N_i_)-c^3^{Pi}_u_(v_j_,N_j_)Ni[0/15] The c rotational statephys.mol.qnintrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintvj[0/21] The X vibrational statephys.mol.qnintNj[1/17] The X rotational statephys.mol.qnintvi[0] The c vibrational statephys.mol.qnintEij[87724/118377] Transition energycm**-1phys.energy;phys.atmol.transitiondoubleVOI[-0.5/0.5] Vibrational Overlap Integral (1)phys.mol.qndoubleJ/ApJS/232/19/table5Energies, transition frequencies, transition probabilities and Franck-Condon Factors of the H_2_ a^3^{Sigma}_g_^+^-c^3^{Pi}_u_^-^ band systemsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintN1[1/15] Upper rotational levelphys.mol.qnintN0[1/15] Lower rotational levelphys.mol.qnintv1[0/21] Upper vibrational statephys.mol.qnintv0[0/20] Lower vibrational statephys.mol.qnintElow[94941/118377] Lower state energycm**-1phys.energydoubleEa-Ec[-23233.5/23432.2] Transition frequency (1)cm**-1em.freq;phys.atmol.transitiondoubleA[/94299] Transition probability (2)s**-1phys.atmol.transProbdoubleFCF[/1] Franck-Condon factor (FCF=|<v1,N1|v0,N0>|^2^)phys.atmoldoubleJ/ApJS/232/19/table7Predissociation rates, kinetic energy release, and FCFs of the c^3^{Pi}_u_^+^(v,N) levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintv[0/21] The v vibrational statephys.mol.qnintN[1/15] The N rotational levelphys.mol.qnintWidth[0.0004/3.5] Predissociation widthcm**-1phys.atmoldoubleRatePredissociation rates**-1phys.atmol.transProbdoubleEk[7.2/10.2] Kenetic energyeVphys.energy;phys.atmol.leveldoubleFCFFranck-Condon factor in units of 1/hartree; FCF=|<c,v,N|b,Ek,N>|^2^phys.atmoldoubleJ/ApJS/232/19/table8Predissociation rates of the c^3^{Pi}_u_^-^ (v,N,J) levelsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintv[0/6] The v vibrational statephys.mol.qnintN[1/15] The N rotational levelphys.mol.qnintF1[3/2447] F_1_ fine structure predissociation rates**-1phys.energy;phys.atmol.level;arith.difffloatF2[243/270505] F_2_ fine structure predissociation rates**-1phys.energy;phys.atmol.level;arith.diffdoubleF3[2/1073]? F_3_ fine structure predissociation rates**-1phys.energy;phys.atmol.level;arith.difffloatnullableAvgAverage predissociation rate (1)s**-1phys.atmol.transProbdoubleJ/ApJS/232/19/table9Calculated energies of the v=0-10 and N=1-15 levels for the H_2_, HD, and D_2_ c^3^{Pi}_u_^-^ staterecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintIDCalculation identifier (1)phys.atmol.elementcharv[0/10] The v vibrational statephys.mol.qnintEng-N1[94941/113080] Calculated energy for N=1 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N2Calculated energy for N=2 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N3Calculated energy for N=3 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N4Calculated energy for N=4 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N5Calculated energy for N=5 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N6Calculated energy for N=6 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N7Calculated energy for N=7 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N8Calculated energy for N=8 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N9Calculated energy for N=9 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N10Calculated energy for N=10 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N11Calculated energy for N=11 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N12Calculated energy for N=12 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N13Calculated energy for N=13 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N14Calculated energy for N=14 rotational levelcm**-1phys.energy;phys.atmol.leveldoubleEng-N15[98600/116384] Calculated energy for N=15 rotational levelcm**-1phys.energy;phys.atmol.leveldouble