Rovibrational (de-)excitation of H2 by HeJ/A+A/685/A113ivo://CDS.VizieR/J/A+A/685/A113doi:10.26093/cds/vizier.36850113CDSJozwiak H.Thibault F.Viel A.Wcislo P.Lique F.2025-07-11T20:01:02Z2024-05-15T09:03:47ZCDS support team
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
cds-question@unistra.fratomic-physicsThe collisional (de-)excitation of H_2_ by He plays an important role in the thermal balance and chemistry of various astrophysical environments, making accurate rate coefficients essential for interpreting observations of the interstellar medium. Our goal is to utilize a state-of-the-art potential energy surface (PES) to provide comprehensive state-to-state rate coefficients for He-induced transitions among rovibrational levels of H_2_. We performed quantum scattering calculations for the H_2_-He system. Thus, we were able to provide state-to-state rate coefficients for 1059 transitions between rovibrational levels of H_2_, with internal energies up to 15000cm-1, for temperatures ranging from 20 to 8000K. Our results demonstrate a good agreement with previous calculations for pure rotational transitions between low-lying rotational levels. However, we do find significant discrepancies for rovibrational processes involving highly-excited rotational and vibrational states. We attribute these differences to two key factors: 1) the broader range of intramolecular distances covered by ab initio points and 2) the superior accuracy of the PES, resulting from the utilization of the state-of-the-art quantum chemistry methods, compared to previous lower-level calculations. Radiative transfer calculations performed with the new collisional data indicate that the population of rotational levels in excited vibrational states experiences significant modifications, highlighting the critical need for this updated dataset in models of high-temperature astrophysical environments.2024A&A...685A.113Jhttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/685/A113CatalogResearchIsServedByTAP VizieR generic servicehttps://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/685/A113https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/685/A113http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/685/A113https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/A+A/685/A113https://vizier.iucaa.in/viz-bin/votable?-source=J/A+A/685/A113http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/A+A/685/A113GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/A+A/685/A113/oh2-levList of rovibrational levels of ortho-H2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintiLevel labelmeta.id;phys.atmol.levelintJRotational quantum number Jinstr.det.qe;phys.mol.rotationintvVibrational quantum number vphys.mol.qn;phys.mol.vibrationint
J/A+A/685/A113/ph2-levList of rovibrational levels of para-H2recnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintiLevel labelmeta.id;phys.atmol.levelintJRotational quantum number Jinstr.det.qe;phys.mol.rotationintvVibrational quantum number vphys.mol.qn;phys.mol.vibrationint
J/A+A/685/A113/oh2-ratRate coefficients for ortho-H2RC180Rate coefficient for T=180Kcm**3.s**-1arith.ratecharRC200Rate coefficient for T=200Kcm**3.s**-1arith.ratecharRC5000Rate coefficient for T=5000Kcm**3.s**-1arith.ratecharRC6000Rate coefficient for T=6000Kcm**3.s**-1arith.ratecharRC7000Rate coefficient for T=7000Kcm**3.s**-1arith.ratecharRC8000Rate coefficient for T=8000Kcm**3.s**-1arith.ratecharRC20Rate coefficient for T=20Kcm**3.s**-1arith.ratecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintnTransition labelmeta.idintiInitial level label (see *h2-lev.dat)meta.id;phys.atmol.initial;phys.atmol.levelintfFinal level label (see *h2-lev.dat)meta.id;phys.atmol.final;phys.atmol.levelintRC30Rate coefficient for T=30Kcm**3.s**-1arith.ratecharRC40Rate coefficient for T=40Kcm**3.s**-1arith.ratecharRC50Rate coefficient for T=50Kcm**3.s**-1arith.ratecharRC60Rate coefficient for T=60Kcm**3.s**-1arith.ratecharRC70Rate coefficient for T=70Kcm**3.s**-1arith.ratecharRC80Rate coefficient for T=80Kcm**3.s**-1arith.ratecharRC90Rate coefficient for T=90Kcm**3.s**-1arith.ratecharRC100Rate coefficient for T=100Kcm**3.s**-1arith.ratecharRC120Rate coefficient for T=120Kcm**3.s**-1arith.ratecharRC140Rate coefficient for T=140Kcm**3.s**-1arith.ratecharRC160Rate coefficient for T=160Kcm**3.s**-1arith.ratecharRC250Rate coefficient for T=250Kcm**3.s**-1arith.ratecharRC300Rate coefficient for T=300Kcm**3.s**-1arith.ratecharRC350Rate coefficient for T=350Kcm**3.s**-1arith.ratecharRC400Rate coefficient for T=400Kcm**3.s**-1arith.ratecharRC450Rate coefficient for T=450Kcm**3.s**-1arith.ratecharRC500Rate coefficient for T=500Kcm**3.s**-1arith.ratecharRC550Rate coefficient for T=550Kcm**3.s**-1arith.ratecharRC600Rate coefficient for T=600Kcm**3.s**-1arith.ratecharRC650Rate coefficient for T=650Kcm**3.s**-1arith.ratecharRC700Rate coefficient for T=700Kcm**3.s**-1arith.ratecharRC750Rate coefficient for T=750Kcm**3.s**-1arith.ratecharRC800Rate coefficient for T=800Kcm**3.s**-1arith.ratecharRC850Rate coefficient for T=850Kcm**3.s**-1arith.ratecharRC900Rate coefficient for T=900Kcm**3.s**-1arith.ratecharRC950Rate coefficient for T=950Kcm**3.s**-1arith.ratecharRC1000Rate coefficient for T=1000Kcm**3.s**-1arith.ratecharRC1100Rate coefficient for T=1100Kcm**3.s**-1arith.ratecharRC1200Rate coefficient for T=1200Kcm**3.s**-1arith.ratecharRC1300Rate coefficient for T=1300Kcm**3.s**-1arith.ratecharRC1400Rate coefficient for T=1400Kcm**3.s**-1arith.ratecharRC1500Rate coefficient for T=1500Kcm**3.s**-1arith.ratecharRC1750Rate coefficient for T=1750Kcm**3.s**-1arith.ratecharRC2000Rate coefficient for T=2000Kcm**3.s**-1arith.ratecharRC3000Rate coefficient for T=3000Kcm**3.s**-1arith.ratecharRC4000Rate coefficient for T=4000Kcm**3.s**-1arith.ratechar
J/A+A/685/A113/ph2-ratRate coefficients for para-H2RC400Rate coefficient for T=400Kcm**3.s**-1arith.ratecharRC450Rate coefficient for T=450Kcm**3.s**-1arith.ratecharrecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintnTransition labelmeta.idintiInitial level label (see *h2-lev.dat)meta.id;phys.atmol.initial;phys.atmol.levelintfFinal level label (see *h2-lev.dat)meta.id;phys.atmol.final;phys.atmol.levelintRC20Rate coefficient for T=20Kcm**3.s**-1arith.ratecharRC1400Rate coefficient for T=1400Kcm**3.s**-1arith.ratecharRC1500Rate coefficient for T=1500Kcm**3.s**-1arith.ratecharRC1750Rate coefficient for T=1750Kcm**3.s**-1arith.ratecharRC2000Rate coefficient for T=2000Kcm**3.s**-1arith.ratecharRC3000Rate coefficient for T=3000Kcm**3.s**-1arith.ratecharRC4000Rate coefficient for T=4000Kcm**3.s**-1arith.ratecharRC5000Rate coefficient for T=5000Kcm**3.s**-1arith.ratecharRC6000Rate coefficient for T=6000Kcm**3.s**-1arith.ratecharRC7000Rate coefficient for T=7000Kcm**3.s**-1arith.ratecharRC8000Rate coefficient for T=8000Kcm**3.s**-1arith.ratecharRC30Rate coefficient for T=30Kcm**3.s**-1arith.ratecharRC40Rate coefficient for T=40Kcm**3.s**-1arith.ratecharRC50Rate coefficient for T=50Kcm**3.s**-1arith.ratecharRC60Rate coefficient for T=60Kcm**3.s**-1arith.ratecharRC70Rate coefficient for T=70Kcm**3.s**-1arith.ratecharRC80Rate coefficient for T=80Kcm**3.s**-1arith.ratecharRC90Rate coefficient for T=90Kcm**3.s**-1arith.ratecharRC100Rate coefficient for T=100Kcm**3.s**-1arith.ratecharRC120Rate coefficient for T=120Kcm**3.s**-1arith.ratecharRC140Rate coefficient for T=140Kcm**3.s**-1arith.ratecharRC160Rate coefficient for T=160Kcm**3.s**-1arith.ratecharRC180Rate coefficient for T=180Kcm**3.s**-1arith.ratecharRC200Rate coefficient for T=200Kcm**3.s**-1arith.ratecharRC250Rate coefficient for T=250Kcm**3.s**-1arith.ratecharRC300Rate coefficient for T=300Kcm**3.s**-1arith.ratecharRC350Rate coefficient for T=350Kcm**3.s**-1arith.ratecharRC500Rate coefficient for T=500Kcm**3.s**-1arith.ratecharRC550Rate coefficient for T=550Kcm**3.s**-1arith.ratecharRC600Rate coefficient for T=600Kcm**3.s**-1arith.ratecharRC650Rate coefficient for T=650Kcm**3.s**-1arith.ratecharRC700Rate coefficient for T=700Kcm**3.s**-1arith.ratecharRC750Rate coefficient for T=750Kcm**3.s**-1arith.ratecharRC800Rate coefficient for T=800Kcm**3.s**-1arith.ratecharRC850Rate coefficient for T=850Kcm**3.s**-1arith.ratecharRC900Rate coefficient for T=900Kcm**3.s**-1arith.ratecharRC950Rate coefficient for T=950Kcm**3.s**-1arith.ratecharRC1000Rate coefficient for T=1000Kcm**3.s**-1arith.ratecharRC1100Rate coefficient for T=1100Kcm**3.s**-1arith.ratecharRC1200Rate coefficient for T=1200Kcm**3.s**-1arith.ratecharRC1300Rate coefficient for T=1300Kcm**3.s**-1arith.ratechar