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 7:

Best-fit transport parameters for various cross-section sets.
X-files	$K_0^{\rm best}\times 10^2$	$\delta^{\rm best}$	$V_{\rm c}^{\rm best}$	$V_{\rm a}^{\rm best}$	$\chi^2$ /d.o.f.
	(kpc² Myr^-1)		(km $\;$ s^-1)	(km $\;$ s^-1)
0: WKS98	2.66	0.53	...	...	23.5
0: S01	3.40	0.40	...	...	34.5
0: W03	4.08	0.40	...	...	28.8
0: GAL09	3.83	0.46	...	...	28.4
I: WKS98	0.45	0.95	10.4	...	12.0
I: S01	0.25	1.01	11.9	...	13.5
I: W03	0.42	0.93	13.5	...	11.2
I: GAL09	0.49	0.95	13.6	...	12.3
II: WKS98	7.19	0.31	...	71.5	3.40
II: S01	9.27	0.22	...	68.8	6.56
II: W03	9.76	0.23	...	73.1	4.73
II: GAL09	10.0	0.26	...	85.0	4.03
III: WKS98	0.69	0.80	15.8	43.5	1.11
III: S01	0.25	0.98	16.2	27.9	3.01
III: W03	0.48	0.86	18.8	38.0	1.47
III: GAL09	0.65	0.82	21.7	49.4	1.53

Notes. Models 0, I, II, and III for L=4 kpc. The four base sets of cross-sections are WKS98 from Webber et al. (1998), S01 from a private communication of Aimé Soutoul (2001), W03 from Webber et al. (2003), and GAL09 from the GALPROP code v50.1p (2009).

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