Galaxy number counts from the Sloan Digital Sky Survey commissioning data

Naoki Yasuda, Masataka Fukugita, Vijay K. Narayanan, Robert H. Lupton, Iskra Strateva, Michael A. Strauss, Željko Ivezić, Rita S.J. Kim, David W. Hoog, David H. Weinberg, Kazuhiro Shimasaku, Jon Loveday, James Annis, Neta A. Bahcall, Michael Blanton, Jon Brinkmann, Robert J. Brunner, Andrew J. Connolly, István Csabai, Mamoru Doi & 16 others Masaru Hamabe, Shin Ichi Ichikawa, Takashi Ichikawa, David E. Johnston, G. R. Knapp, Peter Z. Kunszt, D. Q. Lamb, Timothy A. Mckay, Jeffrey A. Munn, Robert C. Nichol, Sadanori Okamura, Donald P. Schneider, Gyula P. Szokoly, Michael S. Vogeley, Masaru Watanabe, Donald G. York

Research output: Contribution to journalArticle

193 Citations (Scopus)

Abstract

We present bright galaxy number counts in five broad bands (u′, g′, r′, i′, z′) from imaging data taken during the commissioning phase of the Sloan Digital Sky Survey (SDSS). The counts are derived from two independent stripes of imaging scans along the celestial equator, one each toward the northern and the southern Galactic cap, covering about 230 and 210 deg2, respectively. A careful study is made to verify the reliability of the photometric catalog. For galaxies brighter than r* = 16, the catalog produced by automated software is examined against eye inspection of all objects. Statistically meaningful results on the galaxy counts are obtained in the magnitude range 12 ≤ r* ≤ 21, using a sample of 900,000 galaxies. The counts from the two stripes differ by about 30% at magnitudes brighter than r* = 15.5, consistent with a local 2 σ fluctuation due to large-scale structure in the galaxy distribution. The shape of the number counts-magnitude relation brighter than r* = 16 is well characterized by N ∝ 100.6m, the relation expected for a homogeneous galaxy distribution in a "Euclidean" universe. In the magnitude range 16 < r* < 21, the galaxy counts from both stripes agree very well and follow the prediction of the no-evolution model, although the data do not exclude a small amount of evolution. We use empirically determined color transformations to derive the galaxy number counts in the B and I814 bands. We compute the luminosity density of the universe at zero redshift in the five SDSS bands and in the B band. We find ℒB = 2.4 ± 0.4 × 108 L h Mpc-3, for a reasonably wide range of parameters of the Schechter luminosity function in the B band.

Original languageEnglish (US)
Pages (from-to)1104-1124
Number of pages21
JournalAstronomical Journal
Volume122
Issue number3
DOIs
StatePublished - Sep 1 2001

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galaxies
catalogs
universe
luminosity
software
equators
prediction
caps
inspection
coverings
broadband
computer programs
color
distribution
predictions
parameter

All Science Journal Classification (ASJC) codes

  • Astronomy and Astrophysics
  • Space and Planetary Science

Cite this

Yasuda, N., Fukugita, M., Narayanan, V. K., Lupton, R. H., Strateva, I., Strauss, M. A., ... York, D. G. (2001). Galaxy number counts from the Sloan Digital Sky Survey commissioning data. Astronomical Journal, 122(3), 1104-1124. https://doi.org/10.1086/322093
Yasuda, Naoki ; Fukugita, Masataka ; Narayanan, Vijay K. ; Lupton, Robert H. ; Strateva, Iskra ; Strauss, Michael A. ; Ivezić, Željko ; Kim, Rita S.J. ; Hoog, David W. ; Weinberg, David H. ; Shimasaku, Kazuhiro ; Loveday, Jon ; Annis, James ; Bahcall, Neta A. ; Blanton, Michael ; Brinkmann, Jon ; Brunner, Robert J. ; Connolly, Andrew J. ; Csabai, István ; Doi, Mamoru ; Hamabe, Masaru ; Ichikawa, Shin Ichi ; Ichikawa, Takashi ; Johnston, David E. ; Knapp, G. R. ; Kunszt, Peter Z. ; Lamb, D. Q. ; Mckay, Timothy A. ; Munn, Jeffrey A. ; Nichol, Robert C. ; Okamura, Sadanori ; Schneider, Donald P. ; Szokoly, Gyula P. ; Vogeley, Michael S. ; Watanabe, Masaru ; York, Donald G. / Galaxy number counts from the Sloan Digital Sky Survey commissioning data. In: Astronomical Journal. 2001 ; Vol. 122, No. 3. pp. 1104-1124.
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abstract = "We present bright galaxy number counts in five broad bands (u′, g′, r′, i′, z′) from imaging data taken during the commissioning phase of the Sloan Digital Sky Survey (SDSS). The counts are derived from two independent stripes of imaging scans along the celestial equator, one each toward the northern and the southern Galactic cap, covering about 230 and 210 deg2, respectively. A careful study is made to verify the reliability of the photometric catalog. For galaxies brighter than r* = 16, the catalog produced by automated software is examined against eye inspection of all objects. Statistically meaningful results on the galaxy counts are obtained in the magnitude range 12 ≤ r* ≤ 21, using a sample of 900,000 galaxies. The counts from the two stripes differ by about 30{\%} at magnitudes brighter than r* = 15.5, consistent with a local 2 σ fluctuation due to large-scale structure in the galaxy distribution. The shape of the number counts-magnitude relation brighter than r* = 16 is well characterized by N ∝ 100.6m, the relation expected for a homogeneous galaxy distribution in a {"}Euclidean{"} universe. In the magnitude range 16 < r* < 21, the galaxy counts from both stripes agree very well and follow the prediction of the no-evolution model, although the data do not exclude a small amount of evolution. We use empirically determined color transformations to derive the galaxy number counts in the B and I814 bands. We compute the luminosity density of the universe at zero redshift in the five SDSS bands and in the B band. We find ℒB = 2.4 ± 0.4 × 108 L⊙ h Mpc-3, for a reasonably wide range of parameters of the Schechter luminosity function in the B band.",
author = "Naoki Yasuda and Masataka Fukugita and Narayanan, {Vijay K.} and Lupton, {Robert H.} and Iskra Strateva and Strauss, {Michael A.} and Željko Ivezić and Kim, {Rita S.J.} and Hoog, {David W.} and Weinberg, {David H.} and Kazuhiro Shimasaku and Jon Loveday and James Annis and Bahcall, {Neta A.} and Michael Blanton and Jon Brinkmann and Brunner, {Robert J.} and Connolly, {Andrew J.} and Istv{\'a}n Csabai and Mamoru Doi and Masaru Hamabe and Ichikawa, {Shin Ichi} and Takashi Ichikawa and Johnston, {David E.} and Knapp, {G. R.} and Kunszt, {Peter Z.} and Lamb, {D. Q.} and Mckay, {Timothy A.} and Munn, {Jeffrey A.} and Nichol, {Robert C.} and Sadanori Okamura and Schneider, {Donald P.} and Szokoly, {Gyula P.} and Vogeley, {Michael S.} and Masaru Watanabe and York, {Donald G.}",
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Yasuda, N, Fukugita, M, Narayanan, VK, Lupton, RH, Strateva, I, Strauss, MA, Ivezić, Ž, Kim, RSJ, Hoog, DW, Weinberg, DH, Shimasaku, K, Loveday, J, Annis, J, Bahcall, NA, Blanton, M, Brinkmann, J, Brunner, RJ, Connolly, AJ, Csabai, I, Doi, M, Hamabe, M, Ichikawa, SI, Ichikawa, T, Johnston, DE, Knapp, GR, Kunszt, PZ, Lamb, DQ, Mckay, TA, Munn, JA, Nichol, RC, Okamura, S, Schneider, DP, Szokoly, GP, Vogeley, MS, Watanabe, M & York, DG 2001, 'Galaxy number counts from the Sloan Digital Sky Survey commissioning data', Astronomical Journal, vol. 122, no. 3, pp. 1104-1124. https://doi.org/10.1086/322093

Galaxy number counts from the Sloan Digital Sky Survey commissioning data. / Yasuda, Naoki; Fukugita, Masataka; Narayanan, Vijay K.; Lupton, Robert H.; Strateva, Iskra; Strauss, Michael A.; Ivezić, Željko; Kim, Rita S.J.; Hoog, David W.; Weinberg, David H.; Shimasaku, Kazuhiro; Loveday, Jon; Annis, James; Bahcall, Neta A.; Blanton, Michael; Brinkmann, Jon; Brunner, Robert J.; Connolly, Andrew J.; Csabai, István; Doi, Mamoru; Hamabe, Masaru; Ichikawa, Shin Ichi; Ichikawa, Takashi; Johnston, David E.; Knapp, G. R.; Kunszt, Peter Z.; Lamb, D. Q.; Mckay, Timothy A.; Munn, Jeffrey A.; Nichol, Robert C.; Okamura, Sadanori; Schneider, Donald P.; Szokoly, Gyula P.; Vogeley, Michael S.; Watanabe, Masaru; York, Donald G.

In: Astronomical Journal, Vol. 122, No. 3, 01.09.2001, p. 1104-1124.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Galaxy number counts from the Sloan Digital Sky Survey commissioning data

AU - Yasuda, Naoki

AU - Fukugita, Masataka

AU - Narayanan, Vijay K.

AU - Lupton, Robert H.

AU - Strateva, Iskra

AU - Strauss, Michael A.

AU - Ivezić, Željko

AU - Kim, Rita S.J.

AU - Hoog, David W.

AU - Weinberg, David H.

AU - Shimasaku, Kazuhiro

AU - Loveday, Jon

AU - Annis, James

AU - Bahcall, Neta A.

AU - Blanton, Michael

AU - Brinkmann, Jon

AU - Brunner, Robert J.

AU - Connolly, Andrew J.

AU - Csabai, István

AU - Doi, Mamoru

AU - Hamabe, Masaru

AU - Ichikawa, Shin Ichi

AU - Ichikawa, Takashi

AU - Johnston, David E.

AU - Knapp, G. R.

AU - Kunszt, Peter Z.

AU - Lamb, D. Q.

AU - Mckay, Timothy A.

AU - Munn, Jeffrey A.

AU - Nichol, Robert C.

AU - Okamura, Sadanori

AU - Schneider, Donald P.

AU - Szokoly, Gyula P.

AU - Vogeley, Michael S.

AU - Watanabe, Masaru

AU - York, Donald G.

PY - 2001/9/1

Y1 - 2001/9/1

N2 - We present bright galaxy number counts in five broad bands (u′, g′, r′, i′, z′) from imaging data taken during the commissioning phase of the Sloan Digital Sky Survey (SDSS). The counts are derived from two independent stripes of imaging scans along the celestial equator, one each toward the northern and the southern Galactic cap, covering about 230 and 210 deg2, respectively. A careful study is made to verify the reliability of the photometric catalog. For galaxies brighter than r* = 16, the catalog produced by automated software is examined against eye inspection of all objects. Statistically meaningful results on the galaxy counts are obtained in the magnitude range 12 ≤ r* ≤ 21, using a sample of 900,000 galaxies. The counts from the two stripes differ by about 30% at magnitudes brighter than r* = 15.5, consistent with a local 2 σ fluctuation due to large-scale structure in the galaxy distribution. The shape of the number counts-magnitude relation brighter than r* = 16 is well characterized by N ∝ 100.6m, the relation expected for a homogeneous galaxy distribution in a "Euclidean" universe. In the magnitude range 16 < r* < 21, the galaxy counts from both stripes agree very well and follow the prediction of the no-evolution model, although the data do not exclude a small amount of evolution. We use empirically determined color transformations to derive the galaxy number counts in the B and I814 bands. We compute the luminosity density of the universe at zero redshift in the five SDSS bands and in the B band. We find ℒB = 2.4 ± 0.4 × 108 L⊙ h Mpc-3, for a reasonably wide range of parameters of the Schechter luminosity function in the B band.

AB - We present bright galaxy number counts in five broad bands (u′, g′, r′, i′, z′) from imaging data taken during the commissioning phase of the Sloan Digital Sky Survey (SDSS). The counts are derived from two independent stripes of imaging scans along the celestial equator, one each toward the northern and the southern Galactic cap, covering about 230 and 210 deg2, respectively. A careful study is made to verify the reliability of the photometric catalog. For galaxies brighter than r* = 16, the catalog produced by automated software is examined against eye inspection of all objects. Statistically meaningful results on the galaxy counts are obtained in the magnitude range 12 ≤ r* ≤ 21, using a sample of 900,000 galaxies. The counts from the two stripes differ by about 30% at magnitudes brighter than r* = 15.5, consistent with a local 2 σ fluctuation due to large-scale structure in the galaxy distribution. The shape of the number counts-magnitude relation brighter than r* = 16 is well characterized by N ∝ 100.6m, the relation expected for a homogeneous galaxy distribution in a "Euclidean" universe. In the magnitude range 16 < r* < 21, the galaxy counts from both stripes agree very well and follow the prediction of the no-evolution model, although the data do not exclude a small amount of evolution. We use empirically determined color transformations to derive the galaxy number counts in the B and I814 bands. We compute the luminosity density of the universe at zero redshift in the five SDSS bands and in the B band. We find ℒB = 2.4 ± 0.4 × 108 L⊙ h Mpc-3, for a reasonably wide range of parameters of the Schechter luminosity function in the B band.

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Yasuda N, Fukugita M, Narayanan VK, Lupton RH, Strateva I, Strauss MA et al. Galaxy number counts from the Sloan Digital Sky Survey commissioning data. Astronomical Journal. 2001 Sep 1;122(3):1104-1124. https://doi.org/10.1086/322093