131 citations · 733 across the 42 of their papers we have counts for
43 papers
The Road to Normalcy: Environment-Driven Evolutionary Pathways for Primordial Black Holes
Saiyang Zhang, Junehyoung Jeon, Boyuan Liu +2
We investigate how cosmological environment regulates the evolution of primordial black hole (PBH) seeds in the early universe using a suite of hydrodynamical simulations. Unlike t…
GLIMPSE-DDT spectroscopic properties of faint-end galaxies at : Towards first metal enrichment, dust production, and ionizing photon production
Yoshihisa Asada, Seiji Fujimoto, John Chisholm +16
Ultra-faint galaxies at high- are fundamental elements of the early galaxy assembly, and spectroscopic characterization of this population is essential to understand the earlies…
A Novel Formation Channel for Supermassive Black Hole Binaries in the Early Universe via Primordial Black Holes
Saiyang Zhang, Boyuan Liu, Volker Bromm
We present a novel formation channel for supermassive black hole (SMBH) binaries in the early Universe, driven by primordial black holes (PBHs). Using high-resolution hydrodynamica…
BlackTHUNDER: Evidence of three massive black holes in a z~5 galaxy
Hannah Übler, Giovanni Mazzolari, Roberto Maiolino +41
We present observational evidence of three massive, accreting black holes (BHs) in the z=5.0167 galaxy J0148-4214 from JWST/NIRSpec-IFU spectroscopy. The BHs are revealed through b…
A direct black hole mass measurement in a Little Red Dot at the Epoch of Reionization
Ignas Juodžbalis, Cosimo Marconcini, Francesco D'Eugenio +37
Recent discoveries of faint active galactic nuclei (AGN) at the redshift frontier have revealed a plethora of broad \Halpha emitters with optically red continua, named Little Red D…
Little Red Dots and their Progenitors from Direct Collapse Black Holes
Junehyoung Jeon, Boyuan Liu, Volker Bromm +7
The James Webb Space Telescope (JWST) has discovered a new population of objects, the Little Red Dots (LRDs), characterized by V-shaped spectra indicative of strong breaks around t…
Effects of chemically homogeneous evolution of the first stars on the 21-cm signal and reionization
Boyuan Liu, Daniel Kessler, Thomas Gessey-Jones +6
The first generation of stars, known as Population III (Pop III), played a crucial role in the early Universe through their unique formation environment and metal-free composition.…
The Emerging Black Hole Mass Function in the High-Redshift Universe
Junehyoung Jeon, Boyuan Liu, Anthony J. Taylor +5
Observations with the James Webb Space Telescope (JWST) have identified an abundant population of supermassive black holes (SMBHs) already in place during the first few hundred mil…
GLIMPSE: An ultra-faint 10 Pop III Galaxy Candidate and First Constraints on the Pop III UV Luminosity Function at
Seiji Fujimoto, Rohan P. Naidu, John Chisholm +32
Detecting the first generation of stars, Population III (PopIII), has been a long-standing goal in astrophysics, yet they remain elusive even in the JWST era. Here we present a nov…
Signatures of Rapidly Rotating Stars with Chemically Homogeneous Evolution in the First Galaxies
Boyuan Liu, Yves Sibony, Georges Meynet +1
The James Webb Space Telescope (JWST) has revealed an unexpectedly high abundance of UV luminous galaxies at redshifts , challenging `standard' galaxy formation models…
Gravitational waves from mergers of Population III binary black holes: roles played by two evolution channels
Boyuan Liu, Tilman Hartwig, Nina S. Sartorio +6
The gravitational wave (GW) signal from binary black hole (BBH) mergers is a promising probe of Population III (Pop III) stars. To fully unleash the power of the GW probe, one impo…
How do Primordial Black Holes change the Halo Mass Function and Structure?
Saiyang Zhang, Volker Bromm, Boyuan Liu
We examine the effects of massive primordial black holes (PBHs) on cosmic structure formation, employing both a semi-analytical approach and cosmological simulations. Our simulatio…
Physical Pathways for JWST-Observed Supermassive Black Holes in the Early Universe
Junehyoung Jeon, Volker Bromm, Boyuan Liu +1
Observations with the James Webb Space Telescope (JWST) have revealed active galactic nuclei (AGN) powered by supermassive black holes (SMBHs) with estimated masses of …
Impact of primordial black holes on the formation of the first stars and galaxies
Boyuan Liu, Volker Bromm
Recent gravitational wave (GW) observations of binary black hole (BH) mergers and the stochastic GW background have triggered renewed interest in primordial black holes (PBHs) in t…
Distinguishing the impact and signature of black holes from different origins in early cosmic history
Saiyang Zhang, Boyuan Liu, Volker Bromm
We use semi-analytical models to study the effects of primordial black hole (PBH) accretion on the cosmic radiation background during the epoch of reionization (). We c…
Population synthesis of Be X-ray binaries: metallicity dependence of total X-ray outputs
Boyuan Liu, Nina S. Sartorio, Robert G. Izzard +1
X-ray binaries (XRBs) are thought to regulate cosmic thermal and ionization histories during the Epoch of Reionization and Cosmic Dawn ().Theoretical predictions of the…
Observability of Low-Luminosity AGN in the Early Universe with JWST
Junehyoung Jeon, Boyuan Liu, Volker Bromm +1
Active galactic nuclei (AGN) in the early Universe are thought to be prominent sources of energy and ionizing photons that affected the growth of their host galaxy and their enviro…
Accelerating early massive galaxy formation with primordial black holes
Boyuan Liu, Volker Bromm
Recent observations with JWST have identified several bright galaxy candidates at , some of which appear unusually massive (up to ). Such…
Impact of Population III homogeneous stellar evolution on early cosmic reionisation
Yves Sibony, Boyuan Liu, Charlotte Simmonds +2
Context: Population III (Pop III) stars may be fast rotating. An expected consequence of fast rotation is strong internal mixing that deeply affects their evolutionary tracks in th…
Effects of stellar-mass primordial black holes on first star formation
Boyuan Liu, Saiyang Zhang, Volker Bromm
We use cosmological hydrodynamic zoom-in simulations and semi-analytical models to study the effects of primordial black holes (PBHs) on first star formation. Our models self-consi…
Some exact results of the generalized Turán numbers for paths
Doudou Hei, Xinmin Hou, Boyuan Liu
For graphs and with chromatic number , we call strictly -Turán-good (or strictly Turán-good) if the Turán graph is the unique -free…
Detectability of Population III stellar remnants as X-ray binaries from tidal captures in the local Universe
Rabia Husain, Boyuan Liu, Volker Bromm
We assess the feasibility of detecting the compact object remnants from Population III (Pop III) stars in nearby dense star clusters, where they become luminous again as X-ray bina…
Rainbow independent sets in graphs with maximum degree two
Yue Ma, Xinmin Hou, Jun Gao +2
Given a graph , let be the minimal number such that every independent -sets in have a rainbow -set. Let be the family of all grap…
Stellar winds and metal enrichment from fast-rotating Population III stars
Boyuan Liu, Yves Sibony, Georges Meynet +1
Stellar winds from fast-rotating Population III (Pop III) stars have long been suspected to make important contributions to early metal enrichment, as features in the nucleosynthes…