Measuring the Mean Free Path of HI Ionizing Photons with DESI Y1 Quasars

Presentation of my work at DESI 2024 Summer Meeting.

Contents

• Introduction for the significance of mean free path measurements.
• Brief introduction for our method: quasar spectrum stacking.
• Our results:
  1. Systematically shallower evolution of the mean free path at z<5
  2. Confirmation of the change of evolution speed at z~5 and the interpretation as the end of reionization
• Validation of our results: previous work neglected the evolution of Lyman series opacity.

References

• arXiv link for the paper: click here
• My slides for the parallel session (~10 min): click here
• My slide for the spotlight talk (~1 min): click here