Properties of Galaxies in the Reionization Epoch Revealed by the 2012 Hubble Ultra Deep Field Campaign

• Project/Area Number: 24840010
• Research Category: Grant-in-Aid for Research Activity Start-up
• Allocation Type: Single-year Grants
• Research Field: Astronomy
• Research Institution: The University of Tokyo
• Principal Investigator: ONO Yoshiaki 東京大学, 宇宙線研究所, 助教 (60631116)
• Project Period (FY): 2012-08-31 – 2014-03-31
• Project Status: Completed (Fiscal Year 2013)
• Budget Amount: ¥2,600,000 (Direct Cost: ¥2,000,000、Indirect Cost: ¥600,000); Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000); Fiscal Year 2012: ¥1,560,000 (Direct Cost: ¥1,200,000、Indirect Cost: ¥360,000)
• Keywords: 銀河形成 / 銀河進化 / 宇宙再電離 / 高赤方偏移銀河

Research Abstract

The sizes of high-redshift galaxies in the rest-frame ultra-violet wavelengths were measured with deep near-infrared images obtained from the 2012 Hubble Ultra Deep Field campaign, which offered an increased signal-to-noise ratio. The analyses have revealed that the average half-light radii of z~7-10 galaxies are extremely small, 0.3-0.4 kpc, comparable to the sizes of giant molecular associations in local star-forming galaxies. It is also found that the clear trend of decreasing half-light radius with increasing redshift continues beyond z~8.

Research Products

• [Journal Article] Evolution of the Sizes of Galaxies over 7 < z < 12 Revealed by the 2012 Hubble Ultra Deep Field Campaign (2013)
  • Author(s): Ono, Y. et al.
  • Journal Title: The Astrophysical Journal Volume: 777 Issue: 2 Pages: 155-167
  • DOI: 10.1088/0004-637x/777/2/155
  • Peer Reviewed
• [Journal Article] The 2012 Hubble Ultra Deep Field (UDF12) : Observational Overview (2013)
  • Author(s): Koekemoer A. M, Ellis R. S, McLure J, Dunlop J. S, Robertson B. E, Ono Y, Schenker M. A, Ouchi M, Bowler R. A. A, Rogers A. B, Curtis-Lake E, Schneider E, Charlot S, Stark D. P, Furlanetto R, Cirasuolo M, Wild V, and Targett T
  • Journal Title: The Astrophysical Journal Supplement Volume: 209 Issue: 1 Pages: 3-3
  • DOI: 10.1088/0067-0049/209/1/3
  • Peer Reviewed
• [Journal Article] The UV continua and inferred stellar populations of galaxies at z~7-9 revealed by the Hubble Ultra Deep Field 2012 campaign (2013)
  • Author(s): Dunlop J. S, Rogers A. B, McLure R. J, Ellis R. S, Robertson B. E, Koekemoer A, Dayal P, Curtis-Lake E, Wild V, Charlot S, Bowler R. A. A, Schenker M. A, Ouchi M, Ono Y, Cirasuolo M, Furlanetto S. R, Stark D. P, Targett T. A, and Schneider E
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 432 Issue: 4 Pages: 3520-3533
  • DOI: 10.1093/mnras/stt702
  • Peer Reviewed
• [Journal Article] A new multi-field determination of the galaxy luminosity function at z=7-9 incorporating the 2012 Hubble Ultra Deep Field imaging (2013)
  • Author(s): McLure R. J, Dunlop J. S, Bowler R. A. A, Curtis-Lake E, Schenker M, Ellis R. S, Robertson B. E, Koekemoer A. M, Rogers A. B, Ono Y, Ouchi M, Charlot S, Wild V, Stark D. P, Furlanetto S. R, Cirasuolo M, and Targett T. A
  • Journal Title: Monthly Notices of the Royal Astronomical Society Volume: 432 Issue: 4 Pages: 2696-2716
  • DOI: 10.1093/mnras/stt627
  • Peer Reviewed
• [Journal Article] The UV Luminosity Function of star-forming galaxies via dropout selection at redshifts z ~ 7 and 8 from the 2012 Ultra Deep Field campaign (2013)
  • Author(s): Schenker M. A, Robertson B. E, Ellis R. S, Ono Y, McLure R. J, Dunlop J. S, Koekemoer A, Bowler R. A. A, Ouchi M, Curtis-Lake E, Rogers A. B, Schneider E, Charlot S, Stark D. P, Furlanetto S. R, and Cirasuolo M
  • Journal Title: The Astrophysical Journal Volume: 768 Issue: 2 Pages: 196-196
  • DOI: 10.1088/0004-637x/768/2/196
  • Peer Reviewed
• [Journal Article] New Constraints on Cosmic Reionization from the 2012 Hubble Ultra Deep Field Campaign (2013)
  • Author(s): Robertson B. E, Furlanetto S. R, Schneider E, Charlot S, Ellis R. S, Stark D. P, McLure R. J, Dunlop J. S, Koekemoer A, Schenker M. A, Ouchi M, Ono Y, Curtis-Lake E, Rogers A. B, Bowler R. A. A, and Cirasuolo M
  • Journal Title: The Astrophysical Journal Volume: 768 Issue: 1 Pages: 71-71
  • DOI: 10.1088/0004-637x/768/1/71
  • Peer Reviewed
• [Journal Article] The Abundance of Star-Forming Galaxies in the Redshift Range 8.5 to 12 : New Results from the 2012 Hubble Ultra Deep Field Campaign (2013)
  • Author(s): Ellis R. S, McLure R. J, Dunlop J. S, Robertson B. E, Ono Y, Schenker M. A, Koekemoer A, Bowler R. A. A, Ouchi M, Rogers A. B, Curtis-Lake E, Schneider E, Charlot S, Stark D. P, Furlanetto S. R, and Cirasuolo M
  • Journal Title: The Astrophysical Journal Letters Volume: 763 Issue: 1 Pages: L7-L7
  • DOI: 10.1088/2041-8205/763/1/l7
  • Peer Reviewed
• [Remarks] ハッブル宇宙望遠鏡の深宇宙探査により超遠方銀河候補を発見
  • URL: http://www.icrr.u-tokyo.ac.jp/2012/12/13040100.html
• [Remarks] ハッブル宇宙望遠鏡の深宇宙探査により超遠方銀河候補を発見
  • URL: http://www.icrr.u-tokyo.ac.jp/2012/12/13040100.html