2005/11/16 by Masaru Ajiki, M. Ajiki, Yasuhiro Shioya +11 · 1 citation
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Center (category theory) #Crystallography #Emission spectrum #Equivalent width #Full width at half maximum #Galaxies: Formation, Evolution, Phenomena #Galaxy #Lambda #Line (geometry) #Optics #Physics #Quasar #Redshift #Spectral line #Stellar, planetary, and galactic studies #astro-ph
paper · pdf · doi:10.1093/pasj/58.1.113
28 pages, 8 figures, PASJ, Vol. 58, No. 1, in press
arxiv created 2005/11/16 · openalex publication_date 2006/02/25 · arxiv updated 2015/06/24 · openalex created_date 2016/06/24 · openalex updated_date 2026/08/05
Abstract We discuss the observational properties of strong emission-line galaxies at low redshifts found by our deep imaging survey for high-redshift Lyα emitters. In our survey, we used a narrow-band filter, NB816 (λcenter = 8150 Å with FWHM = 120 Å FWHM= 120 Å), and an intermediate-band filter, IA827 (λcenter = 8270 Å with FWHM = 340 Å FWHM= 340 Å). In this survey, 62 NB816-excess (\gt 0.9 mag \gt 0.9 mag) and 21 IA827-excess (\gt 0.8 mag \gt 0.8 mag) objects were found. Among them, we found 20 NB816-excess and 4 IA827-excess Lyα emitter candidates. Therefore, it turns out that 42 NB816-excess and 17 IA827-excess objects are strong emission-line objects at lower redshifts. Since 4 objects in the two low-z samples are common, the total number of strong low-z emitters is 55. Applying our photometric redshift technique, we identified 7 Hα emitters at z ≈ 0.24, 20 Hβ–[O III] ones at z ≈ 0.65, and 11 [O II] ones at z ≈ 1.19. However, we could not determine reliable photometric redshifts of the remaining 17 emitters. The distributions of their rest frame equivalent widths are consistently understood based on recent studies of galaxy evolution from z ∼ 1 to z ∼ 0.