J/ApJ/831/18ivo://CDS.VizieR/J/ApJ/831/18doi:10.26093/cds/vizier.18310018CDSCummings A.C.Stone E.C.Heikkila B.C.Lal N.Webber W.R.,Johannesson G.Moskalenko I.V.Orlando E.Porter T.A.2017-06-21T08:22:04Z2017-02-27T08:48:48ZCDS support team

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

cds-question@unistra.frinterstellar-mediumchemical-abundancesastronomical-modelsSince 2012 August Voyager 1 has been observing the local interstellar energy spectra of Galactic cosmic-ray nuclei down to 3MeV/nuc and electrons down to 2.7MeV. The H and He spectra have the same energy dependence between 3 and 346MeV/nuc, with a broad maximum in the 10-50MeV/nuc range and a H/He ratio of 12.2+/-0.9. The peak H intensity is ~15 times that observed at 1AU, and the observed local interstellar gradient of 3-346MeV H is -0.009+/-0.055%/AU, consistent with models having no local interstellar gradient. The energy spectrum of electrons (e^-^+e^+^) with 2.7-74MeV is consistent with E^-1.30+/-0.05^ and exceeds the H intensity at energies below ~50MeV. Propagation model fits to the observed spectra indicate that the energy density of cosmic-ray nuclei with >3MeV/nuc and electrons with >3MeV is 0.83-1.02eV/cm^3^ and the ionization rate of atomic H is in the range of 1.51-1.64x10^-17^s^-1^. This rate is a factor >10 lower than the ionization rate in diffuse interstellar clouds, suggesting significant spatial inhomogeneity in low-energy cosmic rays or the presence of a suprathermal tail on the energy spectrum at much lower energies. The propagation model fits also provide improved estimates of the elemental abundances in the source of Galactic cosmic rays.2016ApJ...831...18Chttps://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/831/18CatalogResearchIsServedByTAP VizieR generic servicerelated-toJ/ApJ/764/L19 : Methanol emission from the Galactic Center (Yusef-Zadeh+, 2013)J/A+A/534/A54 : GALPROP programme (Strong+, 2011)https://cds.unistra.fr/vizier-org/licences_vizier.htmlhttps://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/831/18https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/831/18http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/831/18https://vizier.cds.unistra.fr/viz-bin/votable?-source=J/ApJ/831/18https://vizier.iucaa.in/viz-bin/votable?-source=J/ApJ/831/18http://vizieridia.saao.ac.za/viz-bin/votable?-source=J/ApJ/831/18GETtext/xml+votablehttps://tapvizier.cds.unistra.fr/TAPVizieR/tapdefaultJ/ApJ/831/18/table15*GALPROP model PD2 intensities in local interstellar medium (LISM) for H through NiCrChromium intensity (1)spect.line.intensitydoubleMnManganese intensity (1)spect.line.intensitydoubleScScandium intensity (1)spect.line.intensitydoubleCoCobalt intensity (1)spect.line.intensitydoubleCaCalcium intensity (1)spect.line.intensitydoubleVVanadium intensity (1)spect.line.intensitydoubleTiTitanium intensity (1)spect.line.intensitydoubleFeIron intensity (1)spect.line.intensitydoubleNiNickel intensity (1)spect.line.intensitydoubleNeNeon intensity (1)spect.line.intensitydoubleNaSodium intensity (1)spect.line.intensitydoubleMgMagnesium intensity (1)spect.line.intensitydoubleAlAluminium intensity (1)spect.line.intensitydoubleSiSilicon intensity (1)spect.line.intensitydoublePPhosphorus intensity (1)spect.line.intensitydoubleSSulfur intensity (1)spect.line.intensitydoubleHeHelium intensity (1)spect.line.intensitydoubleLiLithum intensity (1)spect.line.intensitydoubleBeBeryllium intensity (1)spect.line.intensitydoubleBBoron intensity (1)spect.line.intensitydoubleClChlorine intensity (1)spect.line.intensitydoubleCCarbon intensity (1)spect.line.intensitydoubleNNitrogen intensity (1)spect.line.intensitydoubleArArgon intensity (1)spect.line.intensitydoubleOOxygen intensity (1)spect.line.intensitydoubleKPotassium intensity (1)spect.line.intensitydoubleFFluorine intensity (1)spect.line.intensitydoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintE[3/1.07e+09] Energy in units of MeV/nucphys.energy;phys.atmol.leveldoubleHHydrogen intensity (1)spect.line.intensitydoubleJ/ApJ/831/18/table14*GALPROP model PD1 intensities in local interstellar medium (LISM) for H through NiLiLithum intensity (1)spect.line.intensitydoubleSSulfur intensity (1)spect.line.intensitydoubleClChlorine intensity (1)spect.line.intensitydoubleArArgon intensity (1)spect.line.intensitydoubleKPotassium intensity (1)spect.line.intensitydoubleCaCalcium intensity (1)spect.line.intensitydoubleScScandium intensity (1)spect.line.intensitydoubleTiTitanium intensity (1)spect.line.intensitydoubleVVanadium intensity (1)spect.line.intensitydoubleCrChromium intensity (1)spect.line.intensitydoubleMnManganese intensity (1)spect.line.intensitydoubleFeIron intensity (1)spect.line.intensitydoubleCoCobalt intensity (1)spect.line.intensitydoubleNiNickel intensity (1)spect.line.intensitydoubleFFluorine intensity (1)spect.line.intensitydoubleAlAluminium intensity (1)spect.line.intensitydoubleSiSilicon intensity (1)spect.line.intensitydoublePPhosphorus intensity (1)spect.line.intensitydoubleNNitrogen intensity (1)spect.line.intensitydoubleOOxygen intensity (1)spect.line.intensitydoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintE[3/1.07e+09] Energy in units of MeV/nucphys.energy;phys.atmol.leveldoubleHHydrogen intensity (1)spect.line.intensitydoubleHeHelium intensity (1)spect.line.intensitydoubleBeBeryllium intensity (1)spect.line.intensitydoubleBBoron intensity (1)spect.line.intensitydoubleCCarbon intensity (1)spect.line.intensitydoubleNeNeon intensity (1)spect.line.intensitydoubleNaSodium intensity (1)spect.line.intensitydoubleMgMagnesium intensity (1)spect.line.intensitydoubleJ/ApJ/831/18/table13*GALPROP model DR intensities in local interstellar medium (LISM) for H through NiBeBeryllium intensity (1)spect.line.intensitydoubleMgMagnesium intensity (1)spect.line.intensitydoubleBBoron intensity (1)spect.line.intensitydoubleCCarbon intensity (1)spect.line.intensitydoubleNNitrogen intensity (1)spect.line.intensitydoubleOOxygen intensity (1)spect.line.intensitydoubleFFluorine intensity (1)spect.line.intensitydoubleNeNeon intensity (1)spect.line.intensitydoubleNaSodium intensity (1)spect.line.intensitydoubleAlAluminium intensity (1)spect.line.intensitydoubleSiSilicon intensity (1)spect.line.intensitydoublePPhosphorus intensity (1)spect.line.intensitydoubleSSulfur intensity (1)spect.line.intensitydoubleClChlorine intensity (1)spect.line.intensitydoubleArArgon intensity (1)spect.line.intensitydoubleKPotassium intensity (1)spect.line.intensitydoubleCaCalcium intensity (1)spect.line.intensitydoubleScScandium intensity (1)spect.line.intensitydoubleTiTitanium intensity (1)spect.line.intensitydoubleVVanadium intensity (1)spect.line.intensitydoubleCrChromium intensity (1)spect.line.intensitydoubleMnManganese intensity (1)spect.line.intensitydoubleFeIron intensity (1)spect.line.intensitydoubleCoCobalt intensity (1)spect.line.intensitydoubleNiNickel intensity (1)spect.line.intensitydoubleHeHelium intensity (1)spect.line.intensitydoubleLiLithum intensity (1)spect.line.intensitydoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintE[3/1.07e+09] Energy in units of MeV/nucphys.energy;phys.atmol.leveldoubleHHydrogen intensity (1)spect.line.intensitydoubleJ/ApJ/831/18/table16Leaky-box model (LBM) intensities in local interstellar medium (LISM) for H through Ni, except for Li and Ca, which are not calculatedAlAluminium intensity (1)spect.line.intensitydoubleSiSilicon intensity (1)spect.line.intensitydoublePPhosphorus intensity (1)spect.line.intensitydoubleSSulfur intensity (1)spect.line.intensitydoubleClChlorine intensity (1)spect.line.intensitydoubleArArgon intensity (1)spect.line.intensitydoubleKPotassium intensity (1)spect.line.intensitydoubleScScandium intensity (1)spect.line.intensitydoubleTiTitanium intensity (1)spect.line.intensitydoubleVVanadium intensity (1)spect.line.intensitydoubleCrChromium intensity (1)spect.line.intensitydoubleMnManganese intensity (1)spect.line.intensitydoubleFeIron intensity (1)spect.line.intensitydoubleCoCobalt intensity (1)spect.line.intensitydoubleNiNickel intensity (1)spect.line.intensitydoubleNaSodium intensity (1)spect.line.intensitydoubleMgMagnesium intensity (1)spect.line.intensitydoublerecnoRecord number assigned by the VizieR team. Should Not be used for identification.meta.recordintE[3/134943] Energy in units of MeV/nucphys.energy;phys.atmol.leveldoubleHHydrogen intensity (1)spect.line.intensitydoubleHeHelium intensity (1)spect.line.intensitydoubleBeBeryllium intensity (1)spect.line.intensitydoubleBBoron intensity (1)spect.line.intensitydoubleCCarbon intensity (1)spect.line.intensitydoubleNNitrogen intensity (1)spect.line.intensitydoubleOOxygen intensity (1)spect.line.intensitydoubleFFluorine intensity (1)spect.line.intensitydoubleNeNeon intensity (1)spect.line.intensitydouble