Waseda University

output

19922026

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2019 · astro-ph.GAShow all

12 papers · 2 filters

astro-ph.GA2019★ 29 cited

Balmer Break Galaxy Candidates at $z \sim 6$ : a Potential View on the Star-Formation Activity at $z ≳ 14$

Ken Mawatari, Akio K. Inoue, Takuya Hashimoto +15

We search for galaxies with a strong Balmer break (Balmer Break Galaxies; BBGs) at $z \sim 6$ over a 0.41 deg $^{2}$ effective area in the COSMOS field. Based on rich imaging data, in…

astro-ph.GA2019★ 188 cited

Large Population of ALMA Galaxies at z>6 with Very High [OIII]88um to [CII]158um Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit?

Yuichi Harikane, Masami Ouchi, Akio K. Inoue +20

We present our new ALMA observations targeting [OIII]88um, [CII]158um, [NII]122um, and dust continuum emission for three Lyman break galaxies at z=6.0293-6.2037 identified in the S…

astro-ph.GA2019★ 77 cited

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…

astro-ph.GA2019★ 15 cited

3D Distribution Map of HI Gas and Galaxies Around an Enormous Ly $α$ Nebula and Three QSOs at $z = 2.3$ Revealed by the HI Tomographic Mapping Technique

Shiro Mukae, Masami Ouchi, Zheng Cai +21

We present an IGM HI tomography map in a survey volume of $16 \times 19 \times 131 h^{- 3} comoving Mpc^{3}$ (cMpc $^{3}$ ) centered at MAMMOTH-1 nebula and three neighbouring…

astro-ph.GA2019★ 18 cited

Truth or delusion? A possible gravitational lensing interpretation of the ultra-luminous quasar SDSS J010013.02+280225.8 at $z = 6.30$

Seiji Fujimoto, Masamune Oguri, Tohru Nagao +2

Gravitational lensing sometimes dominates the observed properties of apparently very bright objects. We present morphological properties in the high-resolution (FWHM $\sim 0 .^{''} 15$ )…

astro-ph.GA2019★ 21 cited

Balmer breaks in simulated galaxies at z>6

C. Binggeli, E. Zackrisson, X. Ma +6

Photometric observations of the spectroscopically confirmed $z \approx 9.1$ galaxy MACS1149-JD1 have indicated the presence of a prominent Balmer break in its spectral energy distri…

astro-ph.GA2019★ 12 cited

Subaru narrow-band imaging search for Lyman continuum from galaxies at z>3 in the GOODS-N field

Ikuru Iwata, Akio K. Inoue, Genoveva Micheva +2

We report results of a search for galaxies at z>3 with Lyman continuum (LyC) emission using a narrow-band filter NB359 with Subaru / Suprime-Cam in a ~800 arcmin $^{2}$ blank field ar…

astro-ph.GA2019★ 72 cited

The Absence of [CII] 158 $μ$ m Emission in Spectroscopically-Confirmed Galaxies at $z > 8$

N. Laporte, H. Katz, R. S. Ellis +8

The scatter in the relationship between the strength of [CII] 158 $μ$ m emission and the star formation rate at high-redshift has been the source of much recent interest. Although th…

astro-ph.GA2019★ 21 cited

SILVERRUSH. IX. Lya Intensity Mapping with Star-Forming Galaxies at z=5.7 and 6.6: A Possible Detection of Extended Lya Emission at $≳$ 100 comoving kpc around and beyond the Virial-Radius Scale of Galaxy Dark Matter Halos

Ryota Kakuma, Masami Ouchi, Yuichi Harikane +11

We present results of the cross-correlation Ly $α$ intensity mapping with Subaru/Hyper Suprime-Cam (HSC) ultra-deep narrowband images and Ly $α$ emitters (LAEs) at $z = 5.7$ and $6.6$ …

astro-ph.GA2019★ 19 cited

CHORUS. III. Photometric and Spectroscopic Properties of Ly $α$ Blobs at $z = 4.9 - 7.0$

Haibin Zhang, Masami Ouchi, Ryohei Itoh +20

We report the Subaru Hyper Suprime-Cam (HSC) discovery of two Ly $α$ blobs (LABs), dubbed z70-1 and z49-1 at $z = 6.965$ and $z = 4.888$ respectively, that are Ly $α$ emitters with a bri…

astro-ph.GA2019★ 15 cited

Radiation-pressure-driven dust transport to galaxy halos at $z \sim 10$

Hiroyuki Hirashita, Akio K. Inoue

The origin of dust in galaxy halos or in the circum-galactic medium (CGM) is still a mystery. We investigate if the radiation pressure in high-redshift ( $z \sim 10$ ) galaxies can ef…

astro-ph.GA2019★ 144 cited

First Identification of 10-kpc Scale [CII] 158um Halos around Star-Forming Galaxies at z=5-7

Seiji Fujimoto, Masami Ouchi, Andrea Ferrara +7

We report the discovery of 10-kpc scale [CII] 158um halos surrounding star-forming galaxies in the early Universe. We choose deep ALMA data of 18 galaxies each with a star-formatio…

Balmer Break Galaxy Candidates at z∼6: a Potential View on the Star-Formation Activity at z≳14

Large Population of ALMA Galaxies at z>6 with Very High [OIII]88um to [CII]158um Flux Ratios: Evidence of Extremely High Ionization Parameter or PDR Deficit?

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

3D Distribution Map of HI Gas and Galaxies Around an Enormous Lyα Nebula and Three QSOs at z=2.3 Revealed by the HI Tomographic Mapping Technique

Truth or delusion? A possible gravitational lensing interpretation of the ultra-luminous quasar SDSS J010013.02+280225.8 at z=6.30