A medium-deep redshift survey of a minislice at the north Galactic pole

C. N.A. Willmer, David C. Koo, Alex S. Szalay, Michael J. Kurtz

Research output: Contribution to journalReview articlepeer-review

25 Scopus citations


The first results from a new medium-deep redshift survey of galaxies in a 4° by 49′ slice close to the north Galactic pole have yielded 240 new redshifts, providing a total of 327 redshifts out of 814 galaxies visible to B = 20. This survey extends the transverse information for the first five peaks found in the redshift histogram from a deeper pencil beam sample reported by Broadhurst et al. The first peak, corresponding to the Great Wall, has a significant contribution from galaxies in the outer region of the Coma cluster. Another peak at z ≈ 0.125 is largely confined to a small area and would have been missed by the original deep cone survey if the position were shifted by only 1° westward. Only one of the structures we detect has a wall-like appearance. In general, the high-density structures have irregular shapes, and alternate with low-density regions or voids with various sizes up to ∼ 100 h-1 Mpc, which is a pattern similar to that detected by the shallower wide-angle surveys.

Original languageEnglish (US)
Pages (from-to)560-563
Number of pages4
JournalAstrophysical Journal
Issue number2
StatePublished - Dec 20 1994
Externally publishedYes


  • Cosmology: observations
  • Galaxies: clustering
  • Galaxies: distances and redshifts

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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