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The acceleration of cosmic-ray protons in the supernova remnant RX J1713.7–3946
Abstract
Protons with energies up to ∼1015 eV are the main component of cosmic rays, but evidence for the specific locations where they could have been accelerated to these energies has been lacking. Electrons are known to be accelerated to cosmic-ray energies in supernova remnants, and the shock waves associated with such remnants, when they hit the surrounding interstellar medium, could also provide the energy to accelerate protons. The signature of such a process would be the decay of pions (π0), which are generated when the protons collide with atoms and molecules in an interstellar cloud: pion decay results in γ-rays with a particular spectral-energy distribution. Here we report the observation of cascade showers of optical photons resulting from γ-rays at energies of ∼1012 eV hitting Earth's upper atmosphere, in the direction of the supernova remnant RX J1713.7–3946. The spectrum is a good match to that predicted by pion decay, and cannot be explained by other mechanisms.
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Cites
Elemental and isotopic composition of the galactic cosmic rays
Simpson, J. A. (1983) · Annual Review of Nuclear and Particle Science · doi:10.1146/annurev.ns.33.120183.001543 · Cited by 724
Cited by
Three‐Year Wilkinson Microwave Anisotropy Probe ( WMAP ) Observations: Polarization Analysis
Page, L., Hinshaw, G., Komatsu, E., Nolta, M. R., Spergel, D. N., Bennett, C. L., Barnes, C., Bean, R., Dore, O., Dunkley, J., et al. (2007) · The Astrophysical Journal Supplement Series · doi:10.1086/513699 · Cited by 1,380
COSMIC-RAY PROTON AND HELIUM SPECTRA FROM THE FIRST CREAM FLIGHT
Yoon, Y. S., Ahn, H. S., Allison, P. S., Bagliesi, M. G., Beatty, J. J., Bigongiari, G., Boyle, P. J., Childers, J. T., Conklin, N. B., Coutu, S., et al. (2011) · The Astrophysical Journal · doi:10.1088/0004-637x/728/2/122 · Cited by 334
Aharonian, F., Akhperjanian, A. G., Bazer-Bachi, A. R., Beilicke, M., Benbow, W., Berge, D., Bernlöhr, K., Boisson, C., Bolz, O., Borrel, V., et al. (2006) · Astronomy & Astrophysics · doi:10.1051/0004-6361:20054279 · Cited by 309
Pan, Y., & Wang, B. (2007) · Journal of Biological Chemistry · doi:10.1074/jbc.m608599200 · Cited by 152
Cosmic physics: the high energy frontier
Stecker, F. W. (2003) · Journal of Physics G: Nuclear and Particle Physics · doi:10.1088/0954-3899/29/10/201 · Cited by 48
Metadata
- Authors
- Enomoto, R., Tanimori, T., Naito, T., Yoshida, T., Yanagita, S., Mori, M., Edwards, P. G., Asahara, A., Bicknell, G. V., Gunji, S., Hara, S., Hara, T., Hayashi, S., Itoh, C., Kabuki, S., Kajino, F., Katagiri, H., Kataoka, J., Kawachi, A., Kifune, T., Kubo, H., Kushida, J., Maeda, S., Maeshiro, A., Matsubara, Y., Mizumoto, Y., Moriya, M., Muraishi, H., Muraki, Y., Nakase, T., Nishijima, K., Ohishi, M., Okumura, K., Patterson, J. R., Sakurazawa, K., Suzuki, R., Swaby, D. L., Takano, K., Takano, T., Tokanai, F., Tsuchiya, K., Tsunoo, H., Uruma, K., Watanabe, A., & Yoshikoshi, T.
- Venue
- Nature
- Published
- 2002-04
- Volume
- 416
- Issue
- 6883
- Pages
- 823-826
- ISSN
- 0028-0836 (ISSN-L)
- 1476-4687
- OpenAlex
- W1964412095
- Cited by
- 241
- References
- 1
- FWCI
- 18.06
- Type
- journal article
- Language
- en
- Open access
- closed
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- Enomoto, R., Tanimori, T., Naito, T., Yoshida, T., Yanagita, S., Mori, M., Edwards, P. G., Asahara, A., Bicknell, G. V., Gunji, S., Hara, S., Hara, T., Hayashi, S., Itoh, C., Kabuki, S., Kajino, F., Katagiri, H., Kataoka, J., Kawachi, A., . . . Yoshikoshi, T. (2002). The acceleration of cosmic-ray protons in the supernova remnant RX J1713.7–3946. Nature. https://doi.org/10.1038/416823a
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Bibliographic data: Semantic Scholar, OpenAlex, Crossref.
Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
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