The intermediate-band dropout method: A new method to search for high-redshift galaxies

Yasuhiro Shioya, Yoshiaki Taniguchi, Masaru Ajiki, Tohru Nagao, Takashi Murayama, Shunji Sasaki, Ryoko Sumiya, Yuichiro Hatakeyama

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We propose a new method to search for high-redshift galaxies that is based on an intermediate-band dropout technique rather than the usual broad-band dropout one. In this method, we use an intermediate-band filter whose central wavelength is longer than 7000 A. This new method makes it possible to distinguish both very late-type stars, such as L and T dwarfs, and dusty galaxies at intermediate redshifts from real high-z Lyman break galaxies. The reason for this is that such interlopers do not show strong intermediate-band depression, although they have very red broad-band colors that are indicative of Lyman break galaxies (LBGs). Applying our new method to imaging data sets obtained with Suprime-Cam on the Subaru Telescope, we found a new sample of Lyman break galaxies at z ≃ 5.

Original languageEnglish
Pages (from-to)287-293
Number of pages7
JournalPublications of the Astronomical Society of Japan
Issue number2
Publication statusPublished - 2005


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

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science


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