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- W64323548 abstract "We implemented a Markov Chain Monte Carlo technique to estimate the probability-density functions of the cosmic-ray transport and source parameters in a diffusion model. From the measurement of the B/C ratio and radioactive cosmic-ray clocks, we calculate their probability density functions, with a special emphasis on the halo size L of the Galaxy and the local underdense bubble of size rh . The B/C analysis leads to a most probable diffusion slope δ = 0.86+0.04 for a diffusion model including convection and reacceleration. A combined fit -0.04 on B/C and the isotopic ratios (10 Be/9 Be, 26 Al/27 Al, 36 Cl/Cl) leads to L = 8+8 kpc and -7 rh = 120+20 pc. This value for rh is consistent with direct measurements of the local interstellar -20 medium. The size of the diffusive halo depends crucially on the value of the diffusion slope δ, and also on the presence/absence of the local underdensity damping effect on radioactive nuclei." @default.
- W64323548 created "2016-06-24" @default.
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- W64323548 date "2010-07-18" @default.
- W64323548 modified "2023-09-27" @default.
- W64323548 title "A Markov Chain Monte Carlo technique for Galactic cosmic-ray physics" @default.
- W64323548 hasPublicationYear "2010" @default.
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