• Corpus ID: 238583001

Towards a Better Understanding of Cosmic Chronometers: A new measurement of $H(z)$ at $z\sim0.7$

@inproceedings{Borghi2021TowardsAB,
  title={Towards a Better Understanding of Cosmic Chronometers: A new measurement of \$H(z)\$ at \$z\sim0.7\$},
  author={Nicolas Borghi and M. Moresco and Andrea Cimatti},
  year={2021}
}
In this work, we analyze the stellar ages obtained from a combination of Lick indices in Borghi et al. (2021) for 140 massive and passive galaxies selected in the LEGA-C survey. The median estimated ageredshift relation is used to obtain a new direct measurement of H(z) with the cosmic chronometers approach without any cosmological model assumption. We thoroughly study the main systematics involved in this analysis, including the choice of Lick indices combination, the binning method, the… 

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Understanding robust and exploratory data analysis
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Estimators of Location: An Outline of the Theory (C. Goodall).