Cosmic Ray Electrons and Protons, and Their Antiparticles
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| Natura: | Artículo científico |
| Lingua: | en |
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Sociedade Brasileira de Física
2014
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| _version_ | 1876474427457142784 |
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| author | Mirko Boezio |
| author_facet | Mirko Boezio |
| contents | Cosmic Ray Electrons and Protons, and Their Antiparticles Mirko Boezio Física, Astronomía y Matemáticas ICRC2013 Cosmic rays Antiparticles Cosmic rays are a sample of solar, galactic, and extragalactic matter. Their origin, acceleration mechanisms, and subsequent propagation toward Earth have intrigued scientists since their discovery. These issues can be studied via analysis of the energy spectra and composition of cosmic rays. Protons are the most abundant component of the cosmic radiation, and many experiments have been dedicated to the accurate measurement of t heir spectra. Complementary information is provided by electrons, which comprise about 1 % of the cosmic radiation. Because of their low mass, electrons experience severe energy losses through synchrotron emission in the galactic magnetic field and inverse Compton scattering of radiation fields. Electrons therefore provide information on the local galactic environment that is not accessible from the study of the cosmic ray nuclei. Antiparticles, namely antiprotons and positrons, are produced in the interaction between cosmic ray nuclei and the interstellar matter. They are therefore intimately linked to the propagation mechanisms of the parent nuclei. Novel sources of primary cosmic ray antiparticles of either astrophysical (e.g., positrons from pulsars) or exotic origin (e.g., annihilation of dark matter particles) may exist. The nature of dark matter is one of the most prominent open questions in science today. An observation of positrons from pulsars would open a new observation window on these sources. Several experiments equipped with state-of-the art detector systems have recently presented results on the energy spectra of electrons, protons, and their antiparticles with a significant improvement in statistics and better control of systematics.The status of the field will be reviewed, with a focus on these recent scien tific results. 2014 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46432476003 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.5 Vol.44 |
| format | Artículo científico |
| id | redalyc_46432476003 |
| institution | Redalyc |
| language | en |
| publishDate | 2014 |
| publisher | Sociedade Brasileira de Física |
| spellingShingle | Cosmic Ray Electrons and Protons, and Their Antiparticles Mirko Boezio Física, Astronomía y Matemáticas ICRC2013 Cosmic rays Antiparticles Cosmic Ray Electrons and Protons, and Their Antiparticles Mirko Boezio Física, Astronomía y Matemáticas ICRC2013 Cosmic rays Antiparticles Cosmic rays are a sample of solar, galactic, and extragalactic matter. Their origin, acceleration mechanisms, and subsequent propagation toward Earth have intrigued scientists since their discovery. These issues can be studied via analysis of the energy spectra and composition of cosmic rays. Protons are the most abundant component of the cosmic radiation, and many experiments have been dedicated to the accurate measurement of t heir spectra. Complementary information is provided by electrons, which comprise about 1 % of the cosmic radiation. Because of their low mass, electrons experience severe energy losses through synchrotron emission in the galactic magnetic field and inverse Compton scattering of radiation fields. Electrons therefore provide information on the local galactic environment that is not accessible from the study of the cosmic ray nuclei. Antiparticles, namely antiprotons and positrons, are produced in the interaction between cosmic ray nuclei and the interstellar matter. They are therefore intimately linked to the propagation mechanisms of the parent nuclei. Novel sources of primary cosmic ray antiparticles of either astrophysical (e.g., positrons from pulsars) or exotic origin (e.g., annihilation of dark matter particles) may exist. The nature of dark matter is one of the most prominent open questions in science today. An observation of positrons from pulsars would open a new observation window on these sources. Several experiments equipped with state-of-the art detector systems have recently presented results on the energy spectra of electrons, protons, and their antiparticles with a significant improvement in statistics and better control of systematics.The status of the field will be reviewed, with a focus on these recent scien tific results. 2014 artículo científico 0103-9733 https://www.redalyc.org/articulo.oa?id=46432476003 en http://www.redalyc.org/revista.oa?id=464 Brazilian Journal of Physics application/pdf Sociedade Brasileira de Física Brazilian Journal of Physics (Brasil) Num.5 Vol.44 |
| title | Cosmic Ray Electrons and Protons, and Their Antiparticles |
| topic | Física, Astronomía y Matemáticas ICRC2013 Cosmic rays Antiparticles |
| url | https://www.redalyc.org/articulo.oa?id=46432476003 |