Abstract
In the previous chapters we derived that through the diffusive shock acceleration model about 10 % of the energy emitted by galactic supernova explosions can provide the power needed to account for the observed CRs up to \(\sim \) \(10^{15}-10^{16}\) eV. Under particular conditions, already accelerated particles could gain additional energy through very high electric fields generated by rapidly rotating compact magnetized objects, such as young neutron stars.
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Notes
- 1.
Given the Hubble constant and the fact that \(z\simeq v/c\), it is straightforward to derive that 30 Mpc corresponds to \(z\simeq 0.007\). Compare this value with the scale of Fig. 7.2.
- 2.
A sample and hold electronic circuit is an analog device that grabs (samples) the voltage of a continuously varying analog signal and stores (holds) its value at a constant level for a specified minimal period of time. Sample and hold circuits are typically used in analog-to-digital (ADC) converters.
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Spurio, M. (2015). Ultra High Energy Cosmic Rays. In: Particles and Astrophysics. Astronomy and Astrophysics Library. Springer, Cham. https://doi.org/10.1007/978-3-319-08051-2_7
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