Interstellar Neutral Helium in the Heliosphere from IBEX Observations. VI. The He Density and the Ionization State in the Very Local Interstellar MatterDOI: info:10.3847/1538-4357/ab3462v. 88260
Bzowski, M., Czechowski, A., Frisch, P. C., Fuselier, S. A., Galli, A., Grygorczuk, J., Heerikhuisen, J., Kubiak, M. A., Kucharek, H., McComas, D. J., Möbius, E., Schwadron, N. A., Slavin, Jonathan, Sokół, J. M., Swaczyna, P., Wurz, P., and Zirnstein, E. J. 2019. "Interstellar Neutral Helium in the Heliosphere from IBEX Observations. VI. The He+ Density and the Ionization State in the Very Local Interstellar Matter." The Astrophysical Journal, 882 60. https://doi.org/10.3847/1538-4357/ab3462.