Breaking the radio – gamma-ray connection in Arp 220

@article{YoastHull2019BreakingTR,
  title={Breaking the radio – gamma-ray connection in Arp 220},
  author={Tova M. Yoast-Hull and Norman W. Murray},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2019}
}
Recent analyses of the gamma-ray spectrum from the ultra-luminous infrared galaxy Arp 220 have revealed a discrepancy in the cosmic ray energy injection rates derived from the gamma-rays versus the radio emission. While the observed radio emission is consistent with the star formation rate inferred from infrared observations, a significantly higher cosmic ray population is necessary to accurately model the measured gamma-ray flux. To resolve this discrepancy between the radio and gamma-ray… 
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