Crustal heating in accreting neutron stars from the nuclear energy-density functional theory - I. Proton shell effects and neutron-matter constraint

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Volume 620 (December 2018)

A&A, 620 (2018) A105

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Table A.2.

Non-equilibrium processes in the crust of an accreting NS assuming that the ashes of X-ray bursts consist of pure ⁵⁶Fe using the EDF BSk20 (HFB method in the outer crust, ETFSI method in the inner crust).

P	ρ	Reactions	X_n	Δρ/ρ	μ_e	q
(dyn cm⁻²)	(g cm⁻³)				(MeV)	(keV)
6.48 × 10²⁶	1.38 × 10⁹	⁵⁶Fe → ⁵⁶Cr − 2e⁻ + 2ν_e	0	0.08	4.47	37.0
1.83 × 10²⁸	1.81 × 10¹⁰	⁵⁶Cr → ⁵⁶Ti − 2e⁻ + 2ν_e	0	0.09	10.22	41.2
1.06 × 10²⁹	7.37 × 10¹⁰	⁵⁶Ti → ⁵⁶Ca − 2e⁻ + 2ν_e	0	0.10	15.82	53.4
3.44 × 10²⁹	1.96 × 10¹¹	⁵⁶Ca → ⁵⁶Ar − 2e⁻ + 2ν_e	0	0.11	21.73	12.4
9.06 × 10²⁹	4.50 × 10¹¹	⁵⁶Ar → ⁵⁵Cl + n − e⁻ + ν_e	0	0.06	26.50	0
9.32 × 10²⁹	4.76 × 10¹¹	⁵⁵Cl → ⁵⁴S + ΔN ⋅ n − e⁻ + 2ν_e	0.04	0.06	26.98	0
1.22 × 10³⁰	6.17 × 10¹¹	⁵⁴S → ⁴⁸Si + ΔN ⋅ n − 2e⁻ + 2ν_e	0.14	0.13	28.78	49.1

2.51 × 10³⁰	1.21 × 10¹²	⁴⁸Si → ³⁰O + ΔN ⋅ n − 6e⁻ + 2ν_e
		³⁰O + ³⁰O → ⁵²Si − 2e⁻ + 2ν_e	0.55	0.71	32.71	924.8

5.15 × 10³⁰	3.49 × 10¹²	⁵²Si → ³²O + ΔN ⋅ n − 6e⁻ + 2ν_e
		³²O + ³²O → ⁶¹S	0.73	0.27	34.98	369.7

7.06 × 10³⁰	5.53 × 10¹²	⁶²S → ⁵⁶Si + ΔN ⋅ n − 2e⁻ + 2ν_e	0.75	0.04	36.47	6.3

2.26 × 10³¹	1.32 × 10¹³	⁶⁰Si → ³⁶O + ΔN ⋅ n − 6e⁻ + 2ν_e
		³⁶O + ³⁶O → ⁷⁰S	0.84	0.07	40.81	120.7

1.29 × 10³²	5.08 × 10¹³	⁸⁰S → ⁷⁵P + ΔN ⋅ n − e⁻ + ν_e	0.83	0.003	61.31	0

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