Cosmic ray ionisation of a post-impact early Earth atmosphere - Solar cosmic ray ionisation must be considered in origin-of-life scenarios

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Table 2

Solar wind model output properties are presented with the cosmic ray ionisation rates for the post-impact early Earth atmosphere at 200 Myr.

	v_1au	$\dot{M}$ $\[\dot{M}\]$	R_h	ζ^TOA	ζ^surf

Rotation	(km s⁻¹)	( $\dot{M}$ $\[\dot{M}\]$ _⊙)	(au)	(s⁻¹)	(s⁻¹)
Slow	820	99	1640	3 × 10⁻¹¹	5 × 10⁻²¹
Medium	940	210	2580	8 × 10⁻¹¹	8 × 10⁻²⁰
Fast	1200	560	4700	2 × 10⁻¹⁰	1 × 10⁻¹⁶

Notes. For each of the three assumed solar rotation rates the solar wind velocity at 1 au, v_{1 au}, and mass loss rate, $\dot{M}$ $\[\dot{M}\]$ , are given. $\dot{M}$ $\[\dot{M}\]$ is in terms of the present-day Sun’s mass loss rate, $\dot{M}$ $\[\dot{M}\]$ _⊙. R_h is the calculated radius of the heliosphere. The total ionisation rate, is given at the top of the atmosphere, ζ^TOA, and at the surface (P = 100 bar), ζ^surf.

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