表征高能cosmic ray源的进展
Progress towards characterizing ultrahigh energy cosmic ray sources
摘要：
我们使用一个多信使的方法来约束现实的混合成分模型，使用最新的宇宙射线，中微子和伽马射线的数据的高能宇宙射线源。我们建立在成功的Unger-Farrar-Anchordoqui 2015（UFA 15）模型的基础上，该模型解释了光谱的形状及其复杂的成分演变，通过在源周围的光子场中加速核的光致衰变。我们探索的约束，目前可以放置在红移的源和周围的源的光子场的温度的演变。我们表明，一个很好的拟合得到的所有数据，无论是与源，加速一个狭窄的范围内的核质量或一个银河系一样的混合的核成分，但在后一种情况下，最近的源应该是30-50 Mpc远离银河系，以适应从皮埃尔俄歇天文台的观测。我们还问，数据是否允许一个次主导的纯质子成分在UHE除了主要的UFA 15混合成分。我们发现，这样的双组分模型可以显着提高宇宙射线数据的拟合，同时与当前的多信使数据兼容。
英文摘要：
We use a multimessenger approach to constrain realistic mixed composition models of ultrahigh energy cosmic ray sources using the latest cosmic ray, neutrino, and gamma-ray data. We build on the successful Unger-Farrar-Anchordoqui 2015 (UFA15) model which explains the shape of the spectrum and its complex composition evolution via photodisintegration of accelerated nuclei in the photon field surrounding the source. We explore the constraints which can currently be placed on the redshift evolution of sources and the temperature of the photon field surrounding the sources. We show that a good fit is obtained to all data either with a source which accelerates a narrow range of nuclear masses or a Milky Way-like mix of nuclear compositions, but in the latter case the nearest source should be 30-50 Mpc away from the Milky Way in order to fit observations from the Pierre Auger Observatory. We also ask whether the data allow for a subdominant purely protonic component at UHE in addition to the primary UFA15 mixed composition component. We find that such a two-component model can significantly improve the fit to cosmic ray data while being compatible with current multimessenger data.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
