Lyα emitters at z = 6.5 in the SSA22 field: A large-scale fluctuation of the neutral hydrogen fraction at the end of the reionizaion epoch?

A. K. Inoue, E. Nakamura, T. Hayashino, M. Horie, K. Kousai, T. Fujii, Y. Matsuda

研究成果: Conference contribution

抄録

In a deep image of the SSA22 field taken through a narrowband filter NB912 installed in the Subaru/Suprime-Cam, we have found the number density of the photometric Lyα emitter (LAE) candidates with LLyα > 3 × 1042 erg s-1 at z = 6.5 is a factor of 3-7 smaller than that found at the same redshift in the Subaru Deep field (SDF). There is a trend that more luminous LAE candidates are fewer. If we consider a scenario that a larger neutral fraction of intergalactic hydrogen, x HI, in the SSA22 field obscures a part of Lya emission, x HI in the SSA22 field should be about 2 times larger than that in the SDF, which is translated into xHI < 0.9 in the SSA22 at z = 6.5.

本文言語English
ホスト出版物のタイトルDeciphering the Ancient Universe with Gamma-Ray Bursts
ページ340-342
ページ数3
DOI
出版ステータスPublished - 2010
外部発表はい
イベントInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts" - Kyoto, Japan
継続期間: 2010 4月 192010 4月 23

出版物シリーズ

名前AIP Conference Proceedings
1279
ISSN(印刷版)0094-243X
ISSN(電子版)1551-7616

Conference

ConferenceInternational Symposium "Deciphering the Ancient Universe with Gamma-Ray Bursts"
国/地域Japan
CityKyoto
Period10/4/1910/4/23

ASJC Scopus subject areas

  • 物理学および天文学(全般)

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