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100 papers
Morphological Properties of Lyman Alpha Emitters at Redshift 4.86 in the COSMOS Field: Clumpy Star Formation or Merger?
Masakazu A. R. Kobayashi, Katsuhiro L. Murata, Anton M. Koekemoer +7
We investigate morphological properties of 61 Lyman-alpha emitters (LAEs) at z = 4.86 identified in the COSMOS field, based on Hubble Space Telescope Advanced Camera for Surveys (A…
The Subaru COSMOS 20: Subaru Optical Imaging of the HST COSMOS Field with 20 Filters
Y. Taniguchi, M. Kajisawa, M. A. R. Kobayashi +27
We present both the observations and the data reduction procedures of the Subaru COSMOS 20 project that is an optical imaging survey of the HST COSMOS field, carried out by using S…
The Quasar-LBG Two-point Angular Cross-correlation Function at z ~ 4 in the COSMOS Field
H. Ikeda, T. Nagao, Y. Taniguchi +15
In order to investigate the origin of quasars, we estimate the bias factor for low-luminosity quasars at high redshift for the first time. In this study, we use the two-point angul…
Discovery of Massive, Mostly Star-formation Quenched Galaxies with Extremely Large Lyman-alpha Equivalent Widths at z ~ 3
Yoshiaki Taniguchi, Masaru Kajisawa, Masakazu A. R. Kobayashi +21
We report a discovery of 6 massive galaxies with both extremely large Lya equivalent width and evolved stellar population at z ~ 3. These MAssive Extremely STrong Lya emitting Obje…
Evolution of the Fraction of Clumpy Galaxies at 0.2<z<1.0 in the COSMOS field
K. L. Murata, M. Kajisawa, Y. Taniguchi +7
Using the Hubble Space Telescope/Advanced Camera for Surveys data in the COSMOS field, we systematically searched clumpy galaxies at 0.2<z<1.0 and investigated the fraction of clum…
Environmental Effects on the Star Formation Activity at z~0.9 in the COSMOS Field
M. Kajisawa, Y. Shioya, Y. Aida +6
We investigated the fraction of [OII] emitters in galaxies at z~0.9 as a function of the local galaxy density in the Hubble Space Telescope (HST) COSMOS 2 square degree field. [OII…