144 citations · 687 across the 46 of their papers we have counts for
8 papers · 1 filter
A new approach to constrain the Hubble expansion rate at high redshifts by gravitational waves
Mohammadtaher Safarzadeh, Karan Jani, Nianyi Chen +2
Detection of massive binary black hole (BBH) mergers at high redshifts is a target for LISA space mission. While the individual masses of a BBH merger are redshifted, the mass rati…
A vast population of wandering and merging IMBHs at cosmic noon
Tiziana Di Matteo, Yueying Ni, Nianyi Chen +5
Massive black holes in the centers of galaxies today must have grown by several orders of magnitude from seed black holes formed at early times. Detecting a population of intermedi…
Orbital and Radiative Properties of Wandering Intermediate-Mass Black Holes in the ASTRID Simulation
Emma Jane Weller, Fabio Pacucci, Yueying Ni +4
Intermediate-Mass Black Holes (IMBHs) of are commonly found at the center of dwarf galaxies. Simulations and observations convincingly show that a sizable po…
Ultramassive black holes formed by triple quasar mergers at
Yueying Ni, Tiziana DiMatteo, Nianyi Chen +2
The origin of rare and elusive ultramassive black holes (UMBH, with MBH > 1e10 Msun) is an open question. Using the large volume cosmological hydrodynamic simulation ASTRID, we rep…
A close quasar pair in a disk-disk galaxy merger at z = 2.17
Yu-Ching Chen, Xin Liu, Adi Foord +7
Galaxy mergers produce pairs of supermassive black holes (SMBHs), which may be witnessed as dual quasars if both SMBHs are rapidly accreting. The kiloparsec (kpc)-scale separation…
Statistics of Galactic-Scale Quasar Pairs at Cosmic Noon
Yue Shen, Hsiang-Chih Hwang, Masamune Oguri +8
The statistics of galactic-scale quasar pairs can elucidate our understanding of the dynamical evolution of supermassive black hole (SMBH) pairs, the duty cycles of quasar activity…
Properties and Evolution of Dual and Offset AGN in the ASTRID Simulation at
Nianyi Chen, Tiziana Di Matteo, Yueying Ni +7
We examine the dual (both BHs active) and offset (one BH active) AGN population (comprising 2000 pairs at ) at in the AS…
Patchy Kinetic Sunyaev-Zel'dovich Effect with Controlled Reionization History and Morphology
Nianyi Chen, Hy Trac, Suvodip Mukherjee +1
Using the novel semi-numerical code for reionization AMBER, we model the patchy kinetic Sunyaev-Zel'dovich (kSZ) effect by directly specifying the reionization history with the red…