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Galaxy Astronomy by Sloan Digital Sky Survey

Research Project

Project/Area Number 12304008
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionTHE UNIVERSITY OF TOKYO

Principal Investigator

SEKIGUCHI Masaki  Institute for Cosmic Ray Research, The University of Tokyo, Associate Professor, 宇宙線研究所, 助教授 (40216528)

Co-Investigator(Kenkyū-buntansha) ICHIKAWA shinnichi  National Astronomical Obsavatory, Data-Center, Associate Professor, データセンター, 助教授 (80211738)
ICHIKAWA Takashi  University of Tohoku, Associate Professor, 理学部, 助教授 (80212992)
FUKUGITA Masataka  Institute for Cosmic Ray Research, The University of Tokyo, Professor, 宇宙線研究所, 教授 (40100820)
OKAMURA Sadanori  School of Science, The University of Tokyo, Professor, 大学院・理学系研究科, 教授 (20114423)
DOI Mamoru  School of Science, The University of Tokyo, Associate Professor, 大学院・理学系研究科, 助教授 (00242090)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥49,780,000 (Direct Cost: ¥40,300,000、Indirect Cost: ¥9,480,000)
Fiscal Year 2002: ¥20,800,000 (Direct Cost: ¥16,000,000、Indirect Cost: ¥4,800,000)
Fiscal Year 2001: ¥20,280,000 (Direct Cost: ¥15,600,000、Indirect Cost: ¥4,680,000)
Fiscal Year 2000: ¥8,700,000 (Direct Cost: ¥8,700,000)
KeywordsAll Sky Survey / Galaxy Luminosity Function / Gravitationally Lensed QSO / Cluster of Galaxies
Research Abstract

SDSS Project, as a whole, did not have ant major problems, foreseeing the completion of the survey in 2005. We have accomplished the first major public data release (DR1) in the spring of 2003. DR1 makes 15% of the total survey available to all astronomical researchers world wide as well as general public. In the spring of 2003, 60% of imaging and 40% of spectroscopy have completed.
We have found z=6.4 QSO, the most distant QSO known to the date. Its absorption feature in short wavelength region suggests that z=6.0 is the era when the universe changed from non-ionized to ionized. This observational evidence was first reported by this observation.
We continue to find gravitationally lensed QSOs (GL-QSOs). So far, all of them are found by our group using SDSS data. The number of GL-QSO is a few factor smaller than theoretical prediction. This is a very interesting problem need to be studied soon. We also stared to search GL-QSOs that have a large separation and already found several good candidates.
We confirmed that there are two special kinds of galaxies, 1) spiral galaxies without star formation (we named them "passive spiral"), and 2) elliptical galaxies with star formation (E+A galaxies). Our analysis suggests that the passive spiral galaxies stopped forming stars because their gas and dust were stripped and that they later on merged into normal elliptical galaxies. On the other hand, we think, E+A galaxies are isolated from clusters and do not contribute to the cluster evolution.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (27 results)

All Other

All Publications (27 results)

  • [Publications] D.Eisenstein et al.: "Average Spectra of Massive Galaxies in the Sloan Digital Sky Survey"Astrophysical Journal. 585. 694 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] I.Csabai, et al.: "The Application of Photometric Redshifts to the SDSS Early Data Release"Astronomical Journal. 125. 580 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Goto, S.Okamura, et al.: "Composite Luminosity Functions Based on the Sloan Digital Sky Survey"Cut and Enhance"Galaxy Cluster Catalog"P.A.S.P.. 54. 515 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Strauss et al.: "Spectroscopic Target Selection in the Sloan Digital Sky Survey : The Main Galaxy Sample"Astronomical Journal. 124. 1810 (2002)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.Bahcall et al.: "The Cluster Mass Function from Early Sloan Digital Sky Survey Data : Cosmological Implications"Astrophysical Journal. 585. 182 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] P.Gomez et al.: "Galaxy Star Formation as a Function of Environment in the Early Data Release of the Sloan Digital Sky Survey"Astrophysical Journal. 584. 210 (2003)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] D.Eisenstein et al.: "Average Spectra of Massive Galaxies in Sloan Digital Sky Survey"Astrophysical Journal. 585. 694 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] I.Csabai et al.: "The Application of Photometric Redshifts to the SDSS Early Data Release"Astrophysical Journal. 125. 580 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Goto, S.Okumura et al.: "Composite Luminosity Functions Based on the Sloan Digital Sky Survey "Cut and Enhance" Galaxy Cluster Catalog"P.A.S.P.. 54. 515 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] M.Strauss et al.: "Spectroscopic Target Selection in the Sloan Digital Sky Survey : The Main Galaxy Sample"Astronomical Journal. 124. 1810 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] N.Bahcall et al.: "The Cluster Mass Function from Early Sloan Digital Sky Survey Data : Cosmological Implicatios"Astrophysical Journal. 585. 182 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] P.G omez et al.: "Galaxy star Formation as a Function of Environment in the Early Data Release of the Sloan Digital Sky Survey"Astrophysical Journal. 584. 210 (2003)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] D.Eisenstein et al.: "Average Spectra of Massive Galaixies in the Sloan Digital Sky Surrvey"Astrophysical Journal. 585. 694 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] I.Csabai, et al.: "The Application of Photometric Redshifts to the SDSS Early Data Release"Astronomical Journal. 125. 580 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Goto, S.Okamura, et al.: "Composite Luminosity Functions Based on the Sloan Digital Sky Survey "Cut and Enhance" Galaxy Cluster Catalog"P.A.S.P.. 54. 515 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] M.Strauss et al.: "Spectroscopi Target Selection in the Sloan Digital Sky Survey : The Main Galaxy Sample"Astronomical Journal. 124. 1810 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] N.Bahcall et al.: "The Cluster Mass Function from Early Sloan Digital Sky Sunvey Data : Cosmological Implications"Astrophysical Journal. 585. 182 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] P.Gomez et al.: "Galaxy Star Formation as a Function of Environment in the Early Data Release of the Sloan Digital Sky Survey"Astrophysical Juournal. 584. 210 (2003)

    • Related Report
      2002 Annual Research Report
  • [Publications] C.Stoughton, et al.(SDSS Collaboration): "Sloan Digital Sky Survey : Early Data Release"Astronomical Journal. 123. 485 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] T.Goto, M.Sekiguchi, et al.: "A new method to find galaxy clusters in SDSS data using color"Astronomical Journal. (accepted).

    • Related Report
      2001 Annual Research Report
  • [Publications] N.Yasuda, M.Fukugita, et al.: "Galaxy Number Counts from the Sloan Digital Sky Survey Commissioning Data"Astronomical Journal. 122. 1104 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] K.Shimasaku, M.Fukugita, et al.: "Statistical Properties of Bright Galaxies in the SDSS Photometric System"Astronomical Journal. 122. 1238 (2001)

    • Related Report
      2001 Annual Research Report
  • [Publications] D.Schneider, et al.(SDSS Collaboration): "The Sloan Digital Sky Survey Quasar Catalog. I. Early Data Release"Astronomical Journal. 123. 567 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] Fan,XiaoHui, et al.: "High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data.IV. Luminosity Function from the Fall Equatorial Stripe Sample"Astronomical Journal. 121. 54 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] Fan,Xiaohui, et al.: "High-Redshift Quasars Found in Sloan Digital Sky Survey Commissioning Data.III.A Color-selected Samplet at I^*<20 in the Fall Equatorial Stripe"Astronomical Journal. 121. 31 (2001)

    • Related Report
      2000 Annual Research Report
  • [Publications] York,Donald G., et al.: "The Sloan Digital Sky Survey : Technical Summary"Astronomical Journal. 120. 1579 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] Blanton,M.R., et al.: "The Luminosity Function of Galaxies from SDSS Commissioning Data"AAS. 197. 2703 (2000)

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2017-03-24  

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