Systematic uncertainties on the cosmic-ray transport parameters - Is it possible to reconcile B/C data with δ = 1/3 or δ = 1/2?

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Volume 516 (June-July 2010)

A&A, 516 (2010) A67

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Table 8:

High-energy biases on the W03 cross-section set.
W03	$K_0^{\rm best}\times 10^2$	$\delta^{\rm best}$	$V_{\rm c}^{\rm best}$	$V_{\rm a}^{\rm best}$	$\chi^2$ /d.o.f.
HE bias x	(kpc² Myr^-1)		(km $\;$ s^-1)	(km $\;$ s^-1)
0: +0.05	4.05	0.45	...	...	26.5
0: +0.02	4.06	0.42	...	...	27.7
0: ${\it +0.00}$	4.08	0.40	...	...	28.8
0: -0.02	4.09	0.38	...	...	30.1
0: -0.05	4.13	0.34	...	...	32.5
I: +0.05	0.61	0.89	13.7	...	12.1
I: +0.02	0.49	0.91	13.6	...	11.4
I: ${\it +0.00}$	0.42	0.93	13.5	...	11.2
I: -0.02	0.35	0.95	13.4	...	11.2
I: -0.05	0.27	0.98	13.1	...	11.8
II: +0.05	9.20	0.28	...	78.0	3.26
II: +0.02	9.51	0.25	...	75.0	4.13
II: ${\it +0.00}$	9.76	0.23	...	73.1	4.73
II: -0.02	10.0	0.21	...	71.2	5.35
II: -0.05	10.4	0.19	...	68.1	6.27
III: +0.05	0.98	0.74	19.0	50.0	1.01
III: +0.02	0.75	0.81	19.0	42.7	1.22
III: ${\it +0.00}$	0.48	0.86	18.8	38.0	1.47
III: -0.02	0.35	0.91	18.5	33.4	1.88
III: -0.05	0.21	1.01	17.8	26.6	2.94

Notes. Models 0, I, II, and III for L=4 kpc. The various sets are obtained after multiplying the W03 set by $(E_{\rm k/n})^{x}$ above 1 GeV/n (and kept constant above 10 GeV/n), with x=+0.05, +0.02, 0, -0.02, -0.05. (corresponding to bottom to top curves on the right-hand side of Fig. 3).

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