Cosmic-ray propagation with DRAGON2: I. numerical solver and astrophysical ingredients

被引：161
作者：
Evoli, Carmelo [1 ]
Gaggero, Daniele [2 ]
Vittino, Andrea [3 ]
Di Bernardo, Giuseppe [4 ]
Di Mauro, Mattia [5 ,6 ]
Ligorini, Arianna [7 ]
Ullio, Piero [8 ]
Grasso, Dario [9 ,10 ]
机构：
[1] Gran Sasso Sci Inst, Viale Francesco Crispi 7, I-67100 Laquila, AQ, Italy
[2] Univ Amsterdam, GRAPPA Inst, Sci Pk 904, NL-1090 GL Amsterdam, Netherlands
[3] Tech Univ Munich, Phys Dept T30d, James Franck Str 1, D-85748 Garching, Germany
[4] Max Planck Inst Astrophys, Karl Schwarzschild Str 1, D-85740 Garching, Germany
[5] Stanford Univ, Kavli Inst Particle Astrophys & Cosmol, WW Hansen Expt Phys Lab, Dept Phys, Stanford, CA 94305 USA
[6] Stanford Univ, SLAC Natl Accelerator Lab, Stanford, CA 94305 USA
[7] PAN, Inst Fizyki Jadrowej, Ul Radzikowskiego 152, PL-31342 Krakow, Poland
[8] Scuola Int Super Avanzati, Via Bonomea 265, I-34136 Trieste, Italy
[9] Univ Pisa, Ist Nazl Fis Nucl, Largo B Pontecorvo 3, I-56127 Pisa, Italy
[10] Univ Pisa, Dipartimento Fis E Fermi, Largo B Pontecorvo 3, I-56127 Pisa, Italy
来源：
JOURNAL OF COSMOLOGY AND ASTROPARTICLE PHYSICS | 2017年 / 02期
关键词：
cosmic ray theory; gamma ray theory; GALACTIC MAGNETIC-FIELD; FERMI-LAT OBSERVATIONS; LARGE-AREA TELESCOPE; MILKY-WAY-GALAXY; GAMMA-RAY; RADIAL-DISTRIBUTION; 3-DIMENSIONAL DISTRIBUTION; ROTATION MEASURES; SPIRAL ARMS; INTERSTELLAR-MEDIUM;
D O I：
10.1088/1475-7516/2017/02/015
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We present version 2 of the DRAGON code designed for computing realistic predictions of the CR densities in the Galaxy. The code numerically solves the interstellar CR transport equation (including inhomogeneous and anisotropic diffusion, either in space and momentum, advective transport and energy losses), under realistic conditions. The new version includes an updated numerical solver and several models for the astrophysical ingredients involved in the transport equation. Improvements in the accuracy of the numerical solution are proved against analytical solutions and in reference diffusion scenarios. The novel features implemented in the code allow to simulate the diverse scenarios proposed to reproduce the most recent measurements of local and diffuse CR fluxes, going beyond the limitations of the homogeneous galactic transport paradigm. To this end, several applications using DRAGON2 are presented as well. This new version facilitates the users to include their own physical models by means of a modular C vertical bar vertical bar structure.
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页数：65
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