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Where Accretion Meets Feedback: A Galaxy Redshift Survey in HST/COS Quasar Fields

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Approved LLPs

Principal Investigator: Jessica Werk, University of California, Santa Cruz

Program Summary:

We will perform a new GMOS galaxy redshift survey at z = 0.1 - 0.7 in the fields of 18 QSOs that have been observed with Hubble's Cosmic Origins Spectrograph. With thousands of new galaxy redshifts (a 50x gain over present surveys) we will fill the existing map of circumgalactic medium (CGM) gas out to 3Rvir to address the extent of metal transport and recycling, and the mechanisms of galaxy quenching in halos and large-scale environments, and the 2D structure of the CGM. This program will provide a uniquely rich dataset with a substantial legacy value.


  • Jason Tumlinson, STScI
  • Rongmon Bordoloi, STScI
  • John O'Meara, St. Michael's College
  • J. Xavier Prochaska, UC Santa Cruz
  • Nicolas Tejos, UC Santa Cruz
  • Todd Tripp, UMASS Amherst
  • Joseph Burchett, UMASS Amherst
  • Nicolas Lehner, University of Notre Dame
  • Christopher Howk, University of Notre Dame