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Extremely Metal-Poor Representatives Explored by the Subaru Survey (EMPRESS). I. A Successful Machine Learning Selection of Metal-Poor Galaxies and the Discovery of a Galaxy with M*<10^6 M_sun and 0.016 Z_sun
Takashi Kojima, Masami Ouchi, Michael Rauch +18
We have initiated a new survey for local extremely metal-poor galaxies (EMPGs) with Subaru/Hyper Suprime-Cam (HSC) large-area (~500 deg^2) optical images reaching a 5 sigma limit o…
ALMA observations of molecular gas in the host galaxy of AT2018cow
Kana Morokuma-Matsui, Tomoki Morokuma, Nozomu Tominaga +7
We investigate the molecular gas in, and star-formation properties of, the host galaxy (CGCG 137-068) of a mysterious transient, AT2018cow, at kpc and larger scales, using archival…
The whole picture of the large-scale structure of the CL1604 supercluster at z0.9
Masao Hayashi, Yusei Koyama, Tadayuki Kodama +8
We present the large-scale structure over more than 50 comoving Mpc scale at z 0.9 where the CL1604 supercluster, which is one of the largest structures ever known at high r…
A spectroscopic study of a rich cluster at z=1.52 with Subaru LBT: the environmental impacts on the mass-metallicity relation
Shigeru V. Namiki, Yusei Koyama, Masao Hayashi +9
We present the results of our near-infrared (NIR) spectroscopic observations of a rich cluster candidate around a radio galaxy at (4C65.22) with Subaru/MOIRCS and LBT/LUCI…
Extended star-forming region within galaxies in a dense proto-cluster core at z=2.53
Tomoko L. Suzuki, Yosuke Minowa, Yusei Koyama +5
At , star-formation activity is thought to be high even in high-density environments such as galaxy clusters and proto-clusters. One of the critical but outstanding issues…
Mapping Galaxy Clusters in the Distant Universe
H. Dannerbauer, E. van Kampen, J. Afonso +21
We present the science case for mapping several thousand galaxy (proto)clusters at z=1-10 with a large aperture single dish sub-mm facility, producing a high-redshift counterpart t…