1.1k citations · 6.4k across the 137 of their papers we have counts for
14 papers · 1 filter
Interstellar and Circumgalactic Properties of an Unseen Galaxy: Abundances, Ionization, and Heating in the Earliest Known Quasar Absorber
Robert A. Simcoe, Masafusa Onoue, Anna-Christina Eilers +5
We analyze relative abundances and ionization conditions in a strong absorption system at z=6.84, seen in the spectrum of the z=7.54 background quasar ULAS J134208.10+092838.61. Si…
Faint Quasars Live in the Same Number Density Environments as Lyman Break Galaxies at z ~ 4
Hisakazu Uchiyama, Masayuki Akiyama, Jun Toshikawa +16
Characterizing high-z quasar environments is key to understanding the co-evolution of quasars and the surrounding galaxies. To restrict their global picture, we statistically exami…
The X-SHOOTER/ALMA sample of Quasars in the Epoch of Reionization. I. NIR spectral modeling, iron enrichment and broad emission line properties
Jan-Torge Schindler, Emanuele Paolo Farina, Eduardo Banados +15
We present X-SHOOTER near-infrared spectroscopy of a large sample of 38 luminous ( to ) quasars at , which have complementary CII observations f…
The Faint End of the Quasar Luminosity Function at from the Subaru Hyper Suprime-Cam Survey
Mana Niida, Tohru Nagao, Hiroyuki Ikeda +17
We present the quasar luminosity function at derived from the optical wide-field survey data obtained as a part of the Subaru strategic program (SSP) with Hyper Suprime-…
A significant excess in major merger rate for AGNs with the highest Eddington ratios at z<0.2
V. Marian, K. Jahnke, I. Andika +16
Observational studies are increasingly finding evidence against major mergers being the dominant mechanism responsible for triggering AGN. After studying the connection between maj…
Probing the Nature of High Redshift Weak Emission Line Quasars: A Young Quasar with a Starburst Host Galaxy
Irham Taufik Andika, Knud Jahnke, Masafusa Onoue +15
We present the discovery of PSO J083.8371+11.8482, a weak emission line quasar with extreme star formation rate at . This quasar was selected from Pan-STARRS1, UHS, and u…
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). XI. Proximity Zone Analysis for Faint Quasar Spectra at z~6
Rikako Ishimoto, Nobunari Kashikawa, Masafusa Onoue +14
We present measurements of the size of the quasar proximity zone () for eleven low-luminosity () quasars at , discovered by the Subaru H…
Statistical correlation between the distribution of Ly emitters and IGM HI at mapped by Subaru/Hyper Suprime-Cam
Yongming Liang, Nobunari Kashikawa, Zheng Cai +11
The correlation between neutral Hydrogen (HI) in the intergalactic medium (IGM) and galaxies now attracts great interests. We select four fields which include several coherently st…
The Ionised- and Cool-Gas Content of The BR1202-0725 System as seen by MUSE and ALMA
A. B. Drake, F. Walter, M. Novak +7
We present MUSE observations of the gas-rich major-merger BR1202-0725 at z~4.7, which constitutes one of the most overdense fields known in the early Universe. We utilise these dat…
Subaru High-z Exploration of Low-Luminosity Quasars (SHELLQs). IX. Identification of Two Red Quasars at z > 5.6
Nanako Kato, Yoshiki Matsuoka, Masafusa Onoue +14
We present the first discovery of dust-reddened quasars (red quasars) in the high-z universe (z >5.6). This is a result from the Subaru High-z Exploration of Low-Luminosity Quasars…
Dual supermassive black holes at close separation revealed by the Hyper Suprime-Cam Subaru Strategic Program
John D. Silverman, Shenli Tang, Khee-Gan Lee +30
The unique combination of superb spatial resolution, wide-area coverage, and deep depth of the optical imaging from the Hyper Suprime-Cam (HSC) Subaru Strategic Program is utilized…
The UV Luminosity Function of Protocluster Galaxies at : the Bright-end Excess and the Enhanced Star Formation Rate Density
Kei Ito, Nobunari Kashikawa, Jun Toshikawa +12
We report the rest-frame ultraviolet luminosity function of -dropout galaxies in 177 protocluster candidates (PC UVLF) at selected in the Hyper Suprime-Cam Subaru Strat…
No Redshift Evolution in the Broad Line Region Metallicity up to z=7.54: Deep NIR Spectroscopy of ULAS J1342+0928
Masafusa Onoue, Eduardo Bañados, Chiara Mazzucchelli +12
We present deep (9 hours) Gemini-N/GNIRS near-infrared spectroscopic observations of ULAS J1342+0928, a luminous quasar at z=7.54. Various broad emission lines were detected, as we…
Wide and Deep Exploration of Radio Galaxies with Subaru HSC (WERGS). III. Discovery of a z = 4.72 Radio Galaxy with Lyman Break Technique
Takuji Yamashita, Tohru Nagao, Hiroyuki Ikeda +17
We report a discovery of radio galaxy, HSC J083913.17+011308.1, by using the Lyman break technique with the Hyper Suprime-Cam Subaru Strategic Survey (HSC-SSP) catalog f…