Cosmic evolution of molecular gas mass density from an empirical relationship between L1.4 GHz and L′CO

@article{OrellanaGonzalez2020CosmicEO,
  title={Cosmic evolution of molecular gas mass density from an empirical relationship between L1.4 GHz and L′CO},
  author={Gustavo Orellana-Gonz'alez and Edo Ibar and Roger Leiton and Alasdair P. Thomson and C. Cheng and R. Ivison and Rodrigo Herrera-Camus and Hugo Messias and Paula Calder'on-Castillo and Thomas M. Hughes and Lerothodi Leonard Leeuw},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2020},
  volume={495},
  pages={1760-1770}
}
Historically, GHz radio emission has been used extensively to characterize the star-formation activity in galaxies. In this work, we look for empirical relations amongst the radio luminosity, the infrared luminosity, and the CO-based molecular gas mass. We assemble a sample of 278 nearby galaxies with measurements of radio continuum and total infrared emission, and the $^{12}$CO (J = 1-0) emission line. We find a correlation between the radio continuum and the CO emission line (with a scatter… 

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