A simple prediction of the surface density of galaxies at z ≃ 6

Haojing Yan, Rogier Windhorst, Stephen C. Odewahn, Seth H. Cohen, Huub J A Röttgering, William C. Keel

Research output: Contribution to journalArticle

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Abstract

Systematic surveys are being proposed to discover a significant number of galaxies at z ≃ 6, which is now suggested as the epoch at which the reionization era of the universe ends. To plan such surveys, we need a reasonable expectation of the surface density of high-redshift galaxies at different flux limits. Here we present a simple prediction of the surface density of 5.5 ≤ z ≤ 6.5 galaxies in the optical regime, extrapolating from what is already known about galaxies at z ≃ 3. This prediction is consistent with the results of nearly all known searches for objects at z ≃ 6, giving confidence that we may use it to plan optimal combination of survey depth and sky coverage in searching for such objects. We suggest that the most efficient strategy with existing ground-based facilities is to do medium-depth (mAB ≃ 24.0-24.5 mag), wide-field (a couple of square degrees) survey using a wide-field camera at a 4 m class telescope. As the predicted surface density at this brightness level is very sensitive to the value of L*, the result of such a survey can be easily used to constrain the luminosity evolution from z ≃ 3 to 6.

Original languageEnglish (US)
Pages (from-to)725-731
Number of pages7
JournalAstrophysical Journal
Volume580
Issue number2 I
DOIs
StatePublished - Dec 1 2002

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galaxies
prediction
predictions
sky
confidence
brightness
universe
cameras
luminosity
time measurement
telescopes
plan

Keywords

  • Galaxies: high-redshift
  • Galaxies: luminosity function, mass function

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Yan, H., Windhorst, R., Odewahn, S. C., Cohen, S. H., Röttgering, H. J. A., & Keel, W. C. (2002). A simple prediction of the surface density of galaxies at z ≃ 6. Astrophysical Journal, 580(2 I), 725-731. https://doi.org/10.1086/343866

A simple prediction of the surface density of galaxies at z ≃ 6. / Yan, Haojing; Windhorst, Rogier; Odewahn, Stephen C.; Cohen, Seth H.; Röttgering, Huub J A; Keel, William C.

In: Astrophysical Journal, Vol. 580, No. 2 I, 01.12.2002, p. 725-731.

Research output: Contribution to journalArticle

Yan, H, Windhorst, R, Odewahn, SC, Cohen, SH, Röttgering, HJA & Keel, WC 2002, 'A simple prediction of the surface density of galaxies at z ≃ 6', Astrophysical Journal, vol. 580, no. 2 I, pp. 725-731. https://doi.org/10.1086/343866
Yan H, Windhorst R, Odewahn SC, Cohen SH, Röttgering HJA, Keel WC. A simple prediction of the surface density of galaxies at z ≃ 6. Astrophysical Journal. 2002 Dec 1;580(2 I):725-731. https://doi.org/10.1086/343866
Yan, Haojing ; Windhorst, Rogier ; Odewahn, Stephen C. ; Cohen, Seth H. ; Röttgering, Huub J A ; Keel, William C. / A simple prediction of the surface density of galaxies at z ≃ 6. In: Astrophysical Journal. 2002 ; Vol. 580, No. 2 I. pp. 725-731.
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