J/ApJ/827/62ivo://CDS.VizieR/J/ApJ/827/62doi:10.26093/cds/vizier.18270062CDSMandy M.E.2017-07-04T07:07:56Z2017-01-03T13:32:34ZCDS support team

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

cds-question@unistra.fratomic-physicsState-specific rate coefficients for the dissociation of H_2_ as the result of collisions with H_2_ were calculated for all combinations of (v,j) with an internal energy below 1eV. Full-dimensional quasiclassical trajectories were calculated using the BMKP2 interaction potential with a minimum of 80000 trajectories at each translational energy. Additional large batches of trajectories were carried out to calculate the cross sections near the threshold to dissociation to attain the desired precision of the rate coefficients. A piecewise linear excitation function was used to calculate the rate coefficient between 100 and 100000K. The resulting state-specific rate coefficients, {gamma}, were parametrized as a function of temperature over the range 600-10000K using: log_10_{gamma}(t)=a+bz+cz^2^-d(1/t-1) where t=T/4500K and z=log_10_t. The values of the resulting rate coefficients were sensitive to the internal energy of both molecules, with initial vibrational energy having a slightly greater effect than rotational energy. This effect diminished as temperature increased.2016ApJ...827...62Mhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/827/62CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/827/62https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/827/62http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/827/62https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/827/62https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/827/62http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/827/62GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/827/62/coeffRate coefficients and standard errors (cm^3^/s) in range 450-20000KrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintv[0/1]? v initial state of first hydrogen moleculephys.mol.qnintnullablej[0/9]? j initial state of first hydrogen moleculephys.mol.qnintnullablevp[0/1]? vp initial state of second hydrogen moleculephys.mol.qnintnullablejp[0/9]? jp initial state of second hydrogen moleculephys.mol.qnintnullablecoeff[6.19e-75/1.18e-12] Rate Coefficientcm**3.s**-1arith.ratedoublee_coeffUncertainty in coeffcm**3.s**-1stat.errordoubleTempTemperatureKphys.temperatureintnullableJ/ApJ/827/62/table1Energy levels of selected (v,j) statesrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintvVibrational quantum number vphys.mol.qnintjRotational quantum number jphys.mol.qnintE[0.26/1] Energy level (1)eVphys.energy;phys.atmol.leveldoubleJ/ApJ/827/62/table3Fitting parameters for rate coefficientsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintv[0/1]? v initial state of first hydrogen moleculephys.mol.qnintnullablej[0/9]? j initial state of first hydrogen moleculephys.mol.qnintnullablevp[0/1]? vp initial state of second hydrogen moleculephys.mol.qnintnullablejp[0/9]? jp initial state of second hydrogen moleculephys.mol.qnintnullablea[-19.2/-16.4] Fitting parameter astat.paramfloatb[1.4/4.6] Fitting parameter bstat.paramfloatc[-0.7/1.5] Fitting parameter cstat.fit.paramfloatd[3.3/6.2] Fitting parameter dstat.paramfloat