The cosmological bias factor of damped Lyman alpha systems: dependence on metal line strength

@article{PerezRafols2018TheCB,
  title={The cosmological bias factor of damped Lyman alpha systems: dependence on metal line strength},
  author={Ignasi P'erez-Rafols and Jordi Miralda-Escud'e and Andreu Arinyo-i-Prats and Andreu Font-Ribera and Llu{\'i}s Mas-Ribas},
  journal={Monthly Notices of the Royal Astronomical Society},
  year={2018}
}
We measure the cosmological bias factor of damped Ly α absorbers (DLAs) from their cross-correlation with the Ly α forest absorption, as a function of the DLA metal strength, defined from an average of equivalent widths of the strongest detectable low-ionization metal lines. A clear increase of the bias factor with metal strength is detected, as expected from a relation of metallicity and velocity dispersion with host halo mass. The relation is stronger after the metal strength is corrected for… Expand

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