J/A+A/647/A155ivo://CDS.VizieR/J/A+A/647/A155doi:10.26093/cds/vizier.36470155CDSHernandez M.I.Tejeda G.Fernandez J.M.Montero S.2021-07-05T08:52:18Z2021-03-26T12:12:52ZCDS support team

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

cds-question@unistra.fratomic-physicsIn this work, we present a pruned set of state-to-state rate coefficients (STS rates) for inelastic H_2_:H_2_ collisions in the thermal range from 10 to 1000K. The set includes all relevant rates needed for diagnostics based on the simulation of quadrupole infrared spectra of H_2_. The reported set was obtained from a quantum scattering close-coupling calculation employing a recent version of the MOLSCAT code, a high-level potential energy surface, and rotational energies of the H_2_ molecules with spectroscopic accuracy. These improvements have led to a significant increase in the accuracy with respect to previous computational results. The accuracy of the present STS rates is tested against recently reported experimental rates. Most dominant rates agree with the experiment within a 2{sigma} uncertainty (2 to 6%). In addition to the tables given in the main text, three machine-readable tables are available at the CDS. These tables include all the relevant numerical results of the paper, namely, the excitation and de-excitation STS rates for H_2_:H_2_ inelastic collisions at selected temperatures between 10 and 1000 K, and their functional description for interpolation at any intermediate temperature.2021A&A...647A.155Hhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/647/A155CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/647/A155https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/647/A155http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/647/A155https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/647/A155https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/647/A155http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/647/A155GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/647/A155/table3Parametric description of calculated deexcitation STS rates for H_2_:H_2_ inelastic collisions between 100 and 1000KrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintI1Initial rotational state J=I1physintI2Initial rotational state J=I2physintF1Final rotational state J=F1physintF2Final rotational state J=F2physintGapEnergy gap of the collisionKphysfloatAArrhenius-Kooij coefficient (1)1e-20m**3.s**-1phys.atmol.transProbdoubleBArrhenius-Kooij exponent (1)stat.fit.paramdoubleCArrhenius-Kooij temperature (1)Kstat.fit.paramdoubleSAKStandard error estimate of Arrhenius-Kooij fit; 100-1000K (1)1e-20m**3.s**-1stat.error;stat.fit.paramfloatJ/A+A/647/A155/table1Calculated STS-rates for deexcitation and excitation H_2_:H_2_ inelastic collisionsrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintI1Initial rotational state J=I1 (1)physintI2Initial rotational state J=I2 (1)physintF1Final rotational state J=F1 (1)physintF2Final rotational state J=F2 (1)physintGapEnergy gap of the collisionKphysfloatSTS-10STS-rate at T=10K (1)m**3.s**-1phys.atmoldoubleSTS-20STS-rate at T=20K (1)m**3.s**-1phys.atmoldoubleSTS-30STS-rate at T=30K (1)m**3.s**-1phys.atmoldoubleSTS-40STS-rate at T=40K (1)m**3.s**-1phys.atmoldoubleSTS-50STS-rate at T=50K (1)m**3.s**-1phys.atmoldoubleSTS-60STS-rate at T=60K (1)m**3.s**-1phys.atmoldoubleSTS-70STS-rate at T=70K (1)m**3.s**-1phys.atmoldoubleSTS-80STS-rate at T=80K (1)m**3.s**-1phys.atmoldoubleSTS-90STS-rate at T=90K (1)m**3.s**-1phys.atmoldoubleSTS-100STS-rate at T=100K (1)m**3.s**-1phys.atmoldoubleSTS-120STS-rate at T=120K (1)m**3.s**-1phys.atmoldoubleSTS-140STS-rate at T=140K (1)m**3.s**-1phys.atmoldoubleSTS-160STS-rate at T=160K (1)m**3.s**-1phys.atmoldoubleSTS-180STS-rate at T=180K (1)m**3.s**-1phys.atmoldoubleSTS-200STS-rate at T=200K (1)m**3.s**-1phys.atmoldoubleSTS-225STS-rate at T=225K (1)m**3.s**-1phys.atmoldoubleSTS-250STS-rate at T=250K (1)m**3.s**-1phys.atmoldoubleSTS-275STS-rate at T=275K (1)m**3.s**-1phys.atmoldoubleSTS-300STS-rate at T=300K (1)m**3.s**-1phys.atmoldoubleSTS-500STS-rate at T=500K (1)m**3.s**-1phys.atmoldoubleSTS-750STS-rate at T=750K (1)m**3.s**-1phys.atmoldoubleSTS-1000STS-rate at T=1000K (1)m**3.s**-1phys.atmoldoubleJ/A+A/647/A155/table2Parametric description of calculated deexcitation STS rates for H_2_:H_2_ inelastic collisions between 10 and 200KrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintI1Initial rotational state J=I1 (1)physintI2Initial rotational state J=I2 (1)physintF1Final rotational state J=F1 (1)physintF2Final rotational state J=F2 (1)physintGapEnergy gap of the collisionKphysfloata0Polinomial coefficient (1)meta.notedoublea1Polinomial coefficient (1)meta.notedoublea2Polinomial coefficient (1)meta.notedoublea3Polinomial coefficient (1)meta.notedoublea4Polinomial coefficient (1)meta.notedoublea5Polinomial coefficient (1)meta.notedoubleSpolStandard error estimate of polynomial fit (10-200K)1e-20m**3.s**-1stat.error;stat.fit.paramfloat