127 citations · 685 across the 39 of their papers we have counts for
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SHELLQs. Black Hole Mass and Eddington Ratio Distributions of Intermediate-Luminosity Quasars at 6<z<7
Masafusa Onoue, John D. Silverman, Yoshiki Matsuoka +31
We present near-infrared spectroscopy of 21 quasars at 6.07 < z < 6.90 obtained with JWST/NIRSpec and Subaru/MOIRCS. These targets have absolute ultraviolet magnitudes of -25 < M_1…
Spectrally and spatially resolved (sub)millimeter HCN-to-HCO flux ratios in nearby ultraluminous infrared galaxies
Masatoshi Imanishi, Yuri Nishimura, Shunsuke Baba +2
We present the results of our investigations of spectrally and spatially resolved (sub)millimeter HCN-to-HCO flux ratios at J=2-1, J=3-2, and/or J=4-3 in 18 nearby ( 0.1…
SHELLQs-JWST: Revealing the Spectra of Extended Emission in 12 z > 6 Quasar Host Galaxies using the JWST NIRSpec Fixed Slit
Camryn L. Phillips, Michael A. Strauss, Masafusa Onoue +15
We present an analysis of the rest frame optical JWST NIRSpec Fixed Slit spectra of extended host galaxy emission in 12 quasars from the Subaru High-z Exploration of Low-Luminosity…
SHELLQs-JWST perspective on the intrinsic mass relation between supermassive black holes and their host galaxies at z > 6
John Silverman, Junyao Li, Xuheng Ding +36
The relation between the masses of supermassive black holes (SMBHs) and their host galaxies encodes information on their mode of growth, especially at the earliest epochs. The Jame…
SHELLQs-JWST Unveils the Host Galaxies of 12 Quasars at z>6
Xuheng Ding, Masafusa Onoue, John D. Silverman +35
The advent of JWST has opened new horizons in the study of quasar host galaxies during the reionization epoch (z>6). Building upon our previous initial measurements of stellar ligh…
No Galaxy-Scale [CII] Fast Outflow in the z=6.72 Red Quasar HSC J12050000
Mahoshi Sawamura, Takuma Izumi, Kouichiro Nakanishi +17
HSC 120505.09-000027.9 (J12050000) is one of the highest redshift () dust-reddened quasars (red quasars) known to date. We present an improved analysis of Atacama Large…
A Post-Starburst Pathway for the Formation of Massive Galaxies and Black Holes at z>6
Masafusa Onoue, Xuheng Ding, John D. Silverman +45
Understanding the rapid formation of supermassive black holes (SMBHs) in the early universe requires insight into stellar mass growth in host galaxies. Here, we present NIRSpec res…
Circumnuclear Multi-phase Gas in the Circinus Galaxy. VI. Detectability of Molecular Inflow and Atomic Outflow
Shunsuke Baba, Keiichi Wada, Takuma Izumi +2
Recent submillimeter observations have revealed signs of pc-scale molecular inflow and atomic outflow in the nearest Seyfert 2 galaxy, the Circinus galaxy. To verify the gas kinema…
Spectroscopic Constraints on the Mid-Infrared Attenuation Curve: I -- Attenuation Model using PAH Emission
Thomas S. -Y. Lai, J. D. T. Smith, Els Peeters +4
We introduce a novel model to spectroscopically constrain the mid-infrared (MIR) extinction/attenuation curve from 3--17 um, using Polycyclic Aromatic Hydrocarbon (PAH) emission dr…
BASS XXXIV: A Catalog of the Nuclear Mm-wave Continuum Emission Properties of AGNs Constrained on Scales 100--200 pc
Taiki Kawamuro, Claudio Ricci, Richard F. Mushotzky +25
We present a catalog of the millimeter-wave (mm-wave) continuum properties of 98 nearby ( 0.05) active galactic nuclei (AGNs) selected from the 70-month Swift/BAT hard X-ray c…
ALMA 0.5 kpc Resolution Spatially Resolved Investigations of Nuclear Dense Molecular Gas Properties in Nearby Ultraluminous Infrared Galaxies Based on HCN and HCO Three Transition Line Data
Masatoshi Imanishi, Shunsuke Baba, Kouichiro Nakanishi +1
We present the results of our ALMA 0.5 kpc-resolution dense molecular line (HCN and HCO J=2-1, J=3-2, and J=4-3) observations of 12 nearby (ultra)luminous infrared…
Warm Molecular Gas in the Central Parsecs of the Buried Nucleus of NGC 4418 Traced with the Fundamental CO Ro-vibrational Absorptions
Youichi Ohyama, Shusuke Onishi, Takao Nakagawa +5
We investigated the inner buried nucleus of a nearby luminous infrared galaxy NGC 4418 using high-resolution spectroscopy of fundamental carbon monoxide (CO) ro-vibrational absorpt…
Supermassive black hole feeding and feedback observed on sub-parsec scales
Takuma Izumi, Keiichi Wada, Masatoshi Imanishi +8
Active galaxies contain a supermassive black hole at their center, which grows by accreting matter from the surrounding galaxy. The accretion process in the central ~10 parsecs has…
Dense Molecular Gas Properties of the Central Kpc of Nearby Ultraluminous Infrared Galaxies Constrained by ALMA Three Transition-line Observations
Masatoshi Imanishi, Shunsuke Baba, Kouichiro Nakanishi +1
We report the results of ALMA 1-2 kpc-resolution, three rotational transition line (J=2-1, J=3-2, and J=4-3) observations of multiple dense molecular gas tracers (HCN, HCO, a…
Detection of stellar light from quasar host galaxies at redshifts above 6
Xuheng Ding, Masafusa Onoue, John D. Silverman +41
The detection of starlight from the host galaxies of quasars during the reionization epoch () has been elusive, even with deep HST observations. The current highest redshift q…
BASS XXXII: Studying the Nuclear Mm-wave Continuum Emission of AGNs with ALMA at Scales 100-200 pc
Taiki Kawamuro, Claudio Ricci, Masatoshi Imanishi +25
To understand the origin of nuclear ( 100 pc) millimeter-wave (mm-wave) continuum emission in active galactic nuclei (AGNs), we systematically analyzed sub-arcsec resolut…
Probing dynamics and thermal properties inside molecular tori with CO rovibrational absorption lines
Kosei Matsumoto, Takao Nakagawa, Keiichi Wada +5
A recent hydrodynamic model, "radiation-driven fountain model" (Wada et al. 2016), presented a dynamical picture that active galactic nuclei (AGNs) tori sustain their geometrical t…
Origin and evolution of dust-obscured galaxies in galaxy mergers
Naomichi Yutani, Yoshiki Toba, Shunsuke Baba +1
Dust Obscured Galaxies (DOGs), which are observationally characterized as faint in the optical and bright in the infrared, are the final stage of galaxy mergers and are essential o…
Extremely Buried Nucleus of IRAS 172080014 Observed at Sub-Millimeter and Near-Infrared Wavelengths
Shunsuke Baba, Masatoshi Imanishi, Takuma Izumi +6
The ultraluminous infrared galaxy IRAS 172080014 is a late-stage merger that hosts a buried active galactic nucleus (AGN). To investigate its nuclear structure, we performed hig…
ALMA Sub-arcsec-resolution 183 GHz H2O and Dense Molecular Line Observations of Nearby Ultraluminous Infrared Galaxies
Masatoshi Imanishi, Kouichiro Nakanishi, Takuma Izumi +1
We present the results of ALMA 2 mm, 1-resolution observations of ten (ultra)luminous infrared galaxies ([U]LIRGs; infrared luminosity 10L$_{…
The MBHBM Project -- II. Molecular Gas Kinematics in the Lenticular Galaxy NGC 3593 Reveal a Supermassive Black Hole
Dieu D. Nguyen, Martin Bureau, Sabine Thater +15
As part of the Measuring Black Holes in Below Milky Way-mass (M) galaxies (MBHBM) Project, we present a dynamical measurement of the supermassive black hole (SMBH)…
Hard X-ray Irradiation Potentially Drives Negative AGN Feedback by Altering Molecular Gas Properties
Taiki Kawamuro, Claudio Ricci, Takuma Izumi +4
To investigate the role of active galactic nucleus (AGN) X-ray irradiation on the interstellar medium (ISM), we systematically analyzed Chandra and ALMA CO(=2-1) data for 26 ult…
Anomalous Hydrogen Recombination-Line Ratios in Ultraluminous Infrared Galaxies
Kenichi Yano, Shunsuke Baba, Takao Nakagawa +5
We conducted systematic observations of the H I Br (4.05 m) and Br (2.63 m) lines in 52 nearby () ultraluminous infrared galaxies (ULIRGs) with AKARI. Among 33 U…
Study of the Inner Structure of the Molecular Torus in IRAS 08572+3915 NW with Velocity Decomposition of CO Rovibrational Absorption Lines
Shusuke Onishi, Takao Nakagawa, Shunsuke Baba +6
Understanding the inner structure of the clumpy molecular torus surrounding the active galactic nucleus is essential in revealing the forming mechanism. However, spatially resolvin…