An intermediate-band imaging survey for high-redshift lyman alpha emitters: The Mahoroba-11

Sanae F. Yamada, Shunji S. Sasaki, Ryoko Sumiya, Kazuyoshi Umeda, Yasuhiro Shioya, Masaru Ajiki, Tohru Nagao, Takashi Murayama, Yoshiaki Taniguchi

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14 Citations (Scopus)


We present results of our intermediate-band optical imaging survey for high-z Lyα emitters (LAEs) using the prime focus camera, Suprime-Cam, on the 8.2m Subaru telescope. In our survey, we used eleven filters: four broad-band filters (B, RC, i′, and z′) and seven intermediate-band filters covering from 500nm to 720nm. We call this imaging program the Mahoroba-11. The seven intermediate-band filters were selected from a series of IA filters, which is the Suprime-Cam intermediate-band filter system, whose spectral resolution is R = 23. Our survey was made in a 34′ × 27′ sky area in the Subaru XMM Newton Deep Survey Field. We found 409 IA-excess objects, which provided us with a large photometric sample of strong emission-line objects. Applying the photometric redshift method to this sample, we obtained a new sample of 198 LAE candidates at 3 < z < 5. We found no evidence for evolutions of the number density and the star-formation rate density (SFRD) for LAEs with log L (Lyα) (erg s-1) > 42.67 between z ∼ 3 and z ∼ 5.

Original languageEnglish
Pages (from-to)881-903
Number of pages23
JournalPublication of the Astronomical Society of Japan
Issue number6
Publication statusPublished - 2005


  • Cosmology: early universe
  • Cosmology: observations
  • Galaxies: evolution
  • Galaxies: formation


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