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From the same journal

From the same journal

Discovery of a Giant Lyα Emitter Near the Reionization Epoch

Research output: Contribution to journalLiterature review

Documents

  • 902444

    Accepted author manuscript, 573 KB, PDF document

  • Masami Ouchi
  • Yoshiaki Ono
  • Eiichi Egami
  • Tomoki Saito
  • Masamune Oguri
  • Patrick J. McCarthy
  • Duncan Farrah
  • Nobunari Kashikawa
  • Ivelina Momcheva
  • Kazuhiro Shimasaku
  • Kouichiro Nakanishi
  • Hisanori Furusawa
  • Masayuki Akiyama
  • James S. Dunlop
  • Angela M. J. Mortier
  • Sadanori Okamura
  • Masao Hayashi
  • Michele Cirasuolo
  • Alan Dressler
  • Masanori Iye
  • And 7 others
  • M.J. Jarvis
  • Tadayuki Kodama
  • Crystal L. Martin
  • Ross J. McLure
  • Kouji Ohta
  • Toru Yamada
  • Michitoshi Yoshida
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Original languageEnglish
Number of pages12
Pages (from-to)1164-1175
JournalThe Astrophysical Journal
Journal publication date10 May 2009
Volume696
Issue2
DOIs
Publication statusPublished - 10 May 2009

Abstract

We report the discovery of a giant Lyα emitter (LAE) with a Spitzer/Infrared Array Camera (IRAC) counterpart near the reionization epoch at z = 6.595. The giant LAE is found from the extensive 1 deg2 Subaru narrowband survey for z = 6.6 LAEs in the Subaru/XMM-Newton Deep Survey (SXDS) field, and subsequently identified by deep spectroscopy of Keck/DEIMOS and Magellan/IMACS. Among our 207 LAE candidates, this LAE is not only the brightest narrowband object with L(Lyα) = 3.9 ± 0.2 × 1043 erg s–1 in our survey volume of 106 Mpc3, but also a spatially extended Lyα nebula with the largest isophotal area whose major axis is at least 3''. This object is more likely to be a large Lyα nebula with a size of 17 kpc than to be a strongly lensed galaxy by a foreground object. Our Keck spectrum with medium-high spectral and spatial resolutions suggests that the velocity width is v FWHM = 251 ± 21 km s–1, and that the line-center velocity changes by 60 km s–1 in a 10 kpc range. The stellar mass and star formation rate are estimated to be 0.9-5.0 × 1010 M and >34 M yr–1, respectively, from the combination of deep optical to infrared images of Subaru, UKIDSS-Ultra Deep Survey, and Spitzer/IRAC. Although the nature of this object is not yet clearly understood, this could be an important object for studying cooling clouds accreting onto a massive halo, or forming-massive galaxies with significant outflows contributing to cosmic reionization and metal enrichment of intergalactic medium.

Notes

‘In these times, during the rise in the popularity of institutional repositories, the Society does not forbid authors from depositing their work in such repositories. However, the AAS regards the deposit of scholarly work in such repositories to be a decision of the individual scholar, as long as the individual's actions respect the diligence of the journals and their reviewers.’ Original article can be found at : http://iopscience.iop.org/ Copyright American Astronomical Society

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