An extragalactic spectroscopic survey of the SSA22 field

C. Saez, B. D. Lehmer, F. E. Bauer, D. Stern, A. Gonzales, I. Rreza, D. M. Alexander, Y. Matsuda, J. E. Geach, F. A. Harrison, T. Hayashino

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We present Very Large Telescope VIMOS, Keck DEIMOS and Keck LRIS multi-object spectra of 367 sources in the field of the z ≈ 3.09 protocluster SSA22. Sources are spectroscopically classified via template matching, allowing new identifications for 206 extragalactic sources, including 36 z > 2 Lyman-break galaxies (LBGs) and Lyman α emitters (LAEs), eight protocluster members, and 94 X-ray sources from the ~400 ks Chandra deep survey of SSA22. Additionally, in the area covered by our study, we have increased by ≈4, 13, and 6 times the number of reliable redshifts of sources at 1.0 < z < 2.0, at z > 3.4, and with X-ray emission, respectively. We compare our results with past spectroscopic surveys of SSA22 to investigate the completeness of the LBGs and theX-ray properties of the newspectroscopically classified sources in the SSA22 field.

Original languageEnglish
Pages (from-to)2615-2630
Number of pages16
JournalMonthly Notices of the Royal Astronomical Society
Issue number3
Early online date7 May 2015
Publication statusPublished - 1 Jul 2015


  • Galaxies: active
  • Galaxies: clusters: general
  • Surveys
  • Techniques: imaging spectroscopy
  • X-rays: galaxies


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