Data Release 9: Sokół et al. 2015, Interstellar Neutral Helium in the Heliosphere from IBEX Observations. II. The Warsaw Test Particle Model (WTPM)

File name: totalIonizationHe.txt

File description: total ionization rates for interstellar neutral helium in the ecliptic plane at 1 AU as Carrington rotation averages. Total ionization rates are given as a sum of photoionization by solar EUV radiation, charge exchange with solar wind protons and alpha-particles for the stationary atom approximation, and electron impact ionization for the slow solar wind regime.

File contents: time [decimal year], ionization rate [s^-1], Carrington rotation number

Author: Justyna M. Sokół, Space Research Centre of the Polish Academy of Sciences, Warsaw, Poland

Contact: jsokol@cbk.waw.pl

References:

general: Sokół et al., 2015, Interstellar Neutral Helium in the Heliosphere from IBEX Observations. II. The Warsaw Test Particle Model (WTPM), ApJS

photoionization: Sokół & Bzowski, 2014, Photoionization rates for helium: update, arXiv:1411.4826

charge exchange and electron impact ionization: Bzowski et al. 2013, Modulation of neutral interstellar He, Ne, O in the heliosphere: survival probabilities and abundances at IBEX, Astronomy & Astrophysics Vol 557, A50, doi:10.1051/0004-6361/201321700

solar wind structure: Sokół et al. 2013, Heliolatitude and time variations of solar wind structure from in-situ measurements and interplanetary scintillation observations, Solar Physics Vol 285, pp 167-200, doi:10.1007/s11207-012-9993-9

More details about the ionization models available at:

http://www.cbk.waw.pl/~jsokol/solarParamsModel.html