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Correlation between star formation activity and electron density of ionized gas at z=2.5
Rhythm Shimakawa, Tadayuki Kodama, Charles C. Steidel +7
In the redshift interval of , the physical conditions of the inter-stellar medium (ISM) in star-forming galaxies are likely to be different from those in the local Universe…
An early phase of environmental effects on galaxy properties unveiled by near-infrared spectroscopy of protocluster galaxies at z>2
Rhythm Shimakawa, Tadayuki Kodama, Ken-ichi Tadaki +3
This work presents the results from our near-infrared spectroscopy of narrow-band selected H emitters (HAEs) in two rich over-densities (PKS 1138-262 at and USS 1558-003…
The environmental impacts on the star formation main sequence: an H-alpha study of the newly discovered rich cluster at z=1.52
Yusei Koyama, Tadayuki Kodama, Ken-ichi Tadaki +3
We report the discovery of a strong over-density of galaxies in the field of a radio galaxy at z=1.52 (4C65.22) based on our broad-band and narrow-band (H-alpha) photometry with Su…
Identification of the progenitors of rich clusters and member galaxies in rapid formation at z>2
Rhythm Shimakawa, Tadayuki Kodama, Ken-ichi Tadaki +3
We present the results of near-infrared spectroscopy of H emitters (HAEs) associated with two protoclusters around radio galaxies (PKS1138-262 at =2.2 and USS1558-003 at =…
Evidence for a gas-rich major merger in a proto-cluster at z=2.5
Ken-ichi Tadaki, Tadayuki Kodama, Yoichi Tamura +7
Gas-rich major mergers in high-redshift proto-clusters are important events, perhaps leading to the creation of the slowly rotating remnants seen in the cores of clusters in the pr…
Mapping the large scale structure around a z=1.46 galaxy cluster in 3-D using two adjacent narrow-band filters
Masao Hayashi, Tadayuki Kodama, Yusei Koyama +7
We present a novel method to estimate accurate redshifts of star-forming galaxies by measuring the flux ratio of the same emission line observed through two adjacent narrow-band fi…