@article {22716,
	title = {Obtaining the diffusion coefficient for cosmic ray propagation in the Galactic Centre Ridge through time-dependent simulations of their γ-ray emission},
	volume = {31},
	year = {2009},
	month = {2009/02/1},
	pages = {13 - 18},
	abstract = {Recent observations by the H.E.S.S. collaboration of the Galactic Centre region have revealed what appears to be γ-ray emission from the decay of pions produced by interactions of recently accelerated cosmic rays with local molecular hydrogen clouds. Synthesizing a 3D hydrogen cloud map from the available data and assuming a diffusion coefficient of the form κ(E) = κ<SUB>0</SUB>(E/E<SUB>0</SUB>)<SUP>δ</SUP>, we performed Monte Carlo simulations of cosmic ray diffusion for various propagation times and values of κ<SUB>0</SUB> and δ. By fitting the model γ-ray spectra to the observed one we were able to infer the value of the diffusion coefficient in that environment (κ = 3.0 {\textpm} 0.2 kpc<SUP>2</SUP> Myr<SUP>-1</SUP> for E = 10<SUP>12.5</SUP> eV and for total propagation time 10<SUP>4</SUP> yr) as well as the source spectrum (2.1 ⩽ γ ⩽ 2.3). Also, we found that proton losses can be substantial, which justifies our approach to the problem.},
	keywords = {Astrophysics},
	isbn = {0927-6505},
	url = {https://ui.adsabs.harvard.edu/abs/2009APh....31...13D},
	author = {Dimitrakoudis, Stavros and Mastichiadis, Apostolos and Geranios, Athanasios}
}
