The FLASHES Survey. I. Integral Field Spectroscopy of the CGM around 48 z ≃ 2.3–3.1 QSOs

@article{OSullivan2019TheFS,
  title={The FLASHES Survey. I. Integral Field Spectroscopy of the CGM around 48 z ≃ 2.3–3.1 QSOs},
  author={D{\'o}nal O’Sullivan and Christopher D. Martin and Mateusz Matuszewski and Keri Hoadley and Erika T. Hamden and James D. Neill and Zeren Lin and Prachi Parihar},
  journal={The Astrophysical Journal},
  year={2019},
  volume={894}
}
We present the pilot study of the Fluorescent Lyman-Alpha Structures in High-z Environments Survey; the largest integral field spectroscopy survey to date of the circumgalactic medium at z = 2.3–3.1. We observed 48 quasar fields with the Palomar Cosmic Web Imager to an average (2σ) limiting surface brightness of 6 × 10−18 erg s−1 cm−2 arcsec−2 (in a 1″ aperture and ∼20 Å bandwidth). Extended H i Lyα emission is discovered around 37/48 of the observed quasars, ranging in projected radius from 14… 

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