Absorption of the Lyman- radiation in the heliosphere
arXiv:2111.15412 · doi:10.3847/1538-4357/ac4092
Abstract
Absorption of the Lyman- radiation on Interstellar Neutral Hydrogen (ISN H) atoms in the heliosphere is a potentially important effect to account for in precise gas distribution simulations. In this paper we develop a method to estimate the magnitude of absorption of solar Lyman- radiation inside the solar wind termination shock and to include absorption effects in the Warsaw Test Particle Model (WTPM) by an appropriate modification of radiation pressure. We perform calculations of absorption effects on a 3D grid in the heliosphere and present a set of parameters to model absorption effects for the mean solar activity conditions. We show that absorption can change up to 3% depending on the solar activity level. Using a modified version of WTPM, we calculate the expected signal from IBEX-Lo and show that absorption may modify the simulated flux up to 8%.
Submited to ApJ
References in corpus (7)
- Sun-Heliosphere Observation-based Ionization Rates Model
- Neutral H density at the termination shock: a consolidation of recent results
- Neutral interstellar hydrogen in the inner heliosphere under the influence of wavelength-dependent solar radiation pressure
- Update of the Solar Lyman-Alpha Profile Line Model
- WawHelioGlow: a model of the heliospheric backscatter glow. I. Model definition
- WawHelioGlow: a model of the heliospheric backscatter glow. II. The helioglow buildup and the potential significance of the anisotropy in the solar EUV output
- Influence of Heliolatitudinal Anisotropy of Solar FUV/EUV Emissions on Lyman-alpha Helioglow: SOHO/SWAN Observations and WawHelioGlow Modeling