Cosmic antiprotons in the diffusion model. I: General properties in comparison with other models
Stimulated by latest COS-B gamma data, pointing towards the existence of a weak, radial cosmic ray flux gradient in the Galaxy, and the unsatisfactory description of the Galactic cosmic ray flux, including especially antiprotons, by both, the closed galaxy (CG) and the leaky box (LB) models, the pro...
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| Veröffentlicht in: | Astronomy and astrophysics (Berlin) 1993-03, Vol.269 (1-2), p.601-607 |
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| container_title | Astronomy and astrophysics (Berlin) |
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| creator | HALM, I JANSEN, F DE NIEM, D |
| description | Stimulated by latest COS-B gamma data, pointing towards the existence of a weak, radial cosmic ray flux gradient in the Galaxy, and the unsatisfactory description of the Galactic cosmic ray flux, including especially antiprotons, by both, the closed galaxy (CG) and the leaky box (LB) models, the propagation of cosmic antiprotons and protons is examined in a diffusion model (DM). For the energy- and space-dependent fluxes an analytical solution of the diffusion equation with ionization and annihilation terms is obtained. The relations to both, CG and LB models are elaborated. The results show that it is worthwhile to apply the DM to those problems so far studied only within the CG or LB models, especially whenever precise energy spectra are available. |
| format | Article |
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The results show that it is worthwhile to apply the DM to those problems so far studied only within the CG or LB models, especially whenever precise energy spectra are available.</description><identifier>ISSN: 0004-6361</identifier><identifier>EISSN: 1432-0746</identifier><identifier>CODEN: AAEJAF</identifier><language>eng</language><publisher>Les Ulis: EDP Sciences</publisher><subject>Astronomy ; Earth, ocean, space ; Elementary particle and nuclear processes ; Exact sciences and technology ; Fundamental aspects of astrophysics ; Fundamental astronomy and astrophysics. 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I: General properties in comparison with other models</title><title>Astronomy and astrophysics (Berlin)</title><description>Stimulated by latest COS-B gamma data, pointing towards the existence of a weak, radial cosmic ray flux gradient in the Galaxy, and the unsatisfactory description of the Galactic cosmic ray flux, including especially antiprotons, by both, the closed galaxy (CG) and the leaky box (LB) models, the propagation of cosmic antiprotons and protons is examined in a diffusion model (DM). For the energy- and space-dependent fluxes an analytical solution of the diffusion equation with ionization and annihilation terms is obtained. The relations to both, CG and LB models are elaborated. The results show that it is worthwhile to apply the DM to those problems so far studied only within the CG or LB models, especially whenever precise energy spectra are available.</description><subject>Astronomy</subject><subject>Earth, ocean, space</subject><subject>Elementary particle and nuclear processes</subject><subject>Exact sciences and technology</subject><subject>Fundamental aspects of astrophysics</subject><subject>Fundamental astronomy and astrophysics. 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I: General properties in comparison with other models</title><author>HALM, I ; JANSEN, F ; DE NIEM, D</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-p608-fd92e22d180f94eab0f6c30e034f3d7827c85394f75ada58e595c3ccf6245d803</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>1993</creationdate><topic>Astronomy</topic><topic>Earth, ocean, space</topic><topic>Elementary particle and nuclear processes</topic><topic>Exact sciences and technology</topic><topic>Fundamental aspects of astrophysics</topic><topic>Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>HALM, I</creatorcontrib><creatorcontrib>JANSEN, F</creatorcontrib><creatorcontrib>DE NIEM, D</creatorcontrib><collection>Pascal-Francis</collection><collection>Technology Research Database</collection><collection>Aerospace Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Astronomy and astrophysics (Berlin)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>HALM, I</au><au>JANSEN, F</au><au>DE NIEM, D</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Cosmic antiprotons in the diffusion model. I: General properties in comparison with other models</atitle><jtitle>Astronomy and astrophysics (Berlin)</jtitle><date>1993-03-01</date><risdate>1993</risdate><volume>269</volume><issue>1-2</issue><spage>601</spage><epage>607</epage><pages>601-607</pages><issn>0004-6361</issn><eissn>1432-0746</eissn><coden>AAEJAF</coden><abstract>Stimulated by latest COS-B gamma data, pointing towards the existence of a weak, radial cosmic ray flux gradient in the Galaxy, and the unsatisfactory description of the Galactic cosmic ray flux, including especially antiprotons, by both, the closed galaxy (CG) and the leaky box (LB) models, the propagation of cosmic antiprotons and protons is examined in a diffusion model (DM). For the energy- and space-dependent fluxes an analytical solution of the diffusion equation with ionization and annihilation terms is obtained. The relations to both, CG and LB models are elaborated. The results show that it is worthwhile to apply the DM to those problems so far studied only within the CG or LB models, especially whenever precise energy spectra are available.</abstract><cop>Les Ulis</cop><pub>EDP Sciences</pub><tpages>7</tpages></addata></record> |
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| ispartof | Astronomy and astrophysics (Berlin), 1993-03, Vol.269 (1-2), p.601-607 |
| issn | 0004-6361 1432-0746 |
| language | eng |
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| source | EDP Sciences; EZB-FREE-00999 freely available EZB journals |
| subjects | Astronomy Earth, ocean, space Elementary particle and nuclear processes Exact sciences and technology Fundamental aspects of astrophysics Fundamental astronomy and astrophysics. Instrumentation, techniques, and astronomical observations |
| title | Cosmic antiprotons in the diffusion model. I: General properties in comparison with other models |
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