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arXiv · 2210.15569

Deciphering the Archeological Record: Further Evidence for Ultra-High-Energy Cosmic Ray Acceleration in Starburst-Driven Superwinds

Luis Alfredo Anchordoqui
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Abstract

Very recently, the Pierre Auger and Telescope Array collaborations reported strong evidence for a correlation between the highest energy cosmic rays and nearby starburst galaxies, with a global significance post-trial of $4.6σ$. It is well known that the collective effect of supernovae and winds from massive stars in the central region of these galaxies drives a galactic-scale superwind that can shock heat and accelerate ambient interstellar or circumgalactic gas. In previous work we showed that, for reasonable source parameters, starburst-driven superwinds can be the carriers of ultra-high-energy cosmic ray acceleration. In this paper we assess the extent to which one can approach the archaeological ``inverse'' problem of deciphering properties of superwind evolution from present-day IR emission of their host galaxies. We show that the Outer Limits galaxy NGC 891 could provide ``smoking gun evidence'' for the starburst-driven superwind model of ultra-high-energy cosmic rays.

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Luis Alfredo Anchordoqui. 2023-04-04. Deciphering the Archeological Record: Further Evidence for Ultra-High-Energy Cosmic Ray Acceleration in Starburst-Driven Superwinds. https://arxiv.org/abs/2210.15569

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