When did the first luminous objects appear in the Universe? How did the first generations of galaxies and quasars heat up the intergalactic gas, re-ionize the Universe and end the cosmic dark ages? How did the billion solar mass black holes grow? These are the main questions that we want to answer.

Research Interests

• High-Redshift Quasars/Galaxies
• Black Hole Formation and Growth
• Black Hole and Galaxy Co-evolution
• Cosmic Reionization
• Quasar Absorption Line Systems
• Imaging and Spectroscopic Surveys

Research Projects

  1. Wide-field Survey of Reionzation-era Quasars
  2. A Comprehensive View of the Most Distant Quasars with JWST and ALMA
  3. Optical Spectroscopic Survey: Quasars and Cosmic Reionzation
  4. NIR Spectroscopic Survey: Early Super-massive Black Holes and Quasar UV Properties
  5. DESI High-redshift (z≳5) Quasar Survey
  6. Investigating the Formation of a Bright Gravitationally Lensed Quasar at z=6.5
  7. Quasars in the Post-reionzation Era
  8. Quasar Surveys and Luminosity Function at z ≤ 4

Main Collaborators

© Department of Astronomy and Steward Observatory, University of Arizona, Tucson, AZ, 85721