91 citations · 255 across the 13 of their papers we have counts for
13 papers
Modeling Quasar Proximity Zones in a Realistic Cosmological Environment with a Self-consistent Light Curve
Yihao Zhou, Huanqing Chen, Tiziana Di Matteo +3
We study quasar proximity zones in a simulation that includes a self-consistent quasar formation model and realistic IGM environments. The quasar host halo is $10^{13}\ M_{\mathrm{…
The Characteristic Shape of Damping Wings During Reionization
Huanqing Chen
Spectroscopic analysis of Ly damping wings of bright sources at is a promising way to measure the reionization history of the universe. However, the theoretical interpreta…
Reconstructing Large-scale Temperature Profiles around Quasars
Huanqing Chen, Rupert Croft, Nickolay Y. Gnedin
High-redshift quasars ionize HeII into HeIII around them, heating the IGM in the process and creating large regions with elevated temperature. In this work, we demonstrate a method…
Long Dark Gaps in the Ly Forest at : Evidence of Ultra Late Reionization from XQR-30 Spectra
Yongda Zhu, George D. Becker, Sarah E. I. Bosman +22
We present a new investigation of the intergalactic medium (IGM) near reionization using dark gaps in the Lyman- (Ly) forest. With its lower optical depth, Ly offers a pot…
Measuring the Density Fields around Bright Quasars at with XQR-30 Spectra
Huanqing Chen, Anna-Christina Eilers, Sarah E. I. Bosman +10
Measuring the density of the intergalactic medium using quasar sightlines in the epoch of reionization is challenging due to the saturation of Lyman- absorption. Near a luminous…
Approximating Density Probability Distribution Functions Across Cosmologies
Huanqing Chen, Nickolay Y. Gnedin, Philip Mansfield
Using a suite of self-similar cosmological simulations, we measure the probability distribution functions (PDFs) of real-space density, redshift-space density, and their geometric…
Recovering Density Fields inside Quasar Proximity Zones at
Huanqing Chen, Nickolay Y. Gnedin
The matter density field at is very challenging to probe. One of the traditional probes of the low density IGM that works successfully at lower redshifts is the Lyman-alp…
Powerful t-SNE technique leading to clear separation of type-2 AGN and HII galaxies in BPT diagrams
XueGuang Zhang, Yanqiu Feng, Huan Chen +1
Narrow emission-line galaxies can be distinguished in the well-known BPT diagrams through narrow emission line properties. However, there are no boundaries visible to the naked eye…
The Distribution and Evolution of Quasar Proximity Zone Sizes
Huanqing Chen, Nickolay Y. Gnedin
In this paper, we study the sizes of quasar proximity zones with synthetic quasar absorption spectra obtained by post-processing a Cosmic Reionization On Computers (CROC) simulatio…
The Role of Quasar Radiative Feedback on Galaxy Formation during Cosmic Reionization
Huanqing Chen
Recent observations have found that many quasar fields lack galaxies. This unexpected lack of galaxies may potentially be explained by quasar radiation feedback. In this…
Imprints of Mass Accretion History on the Shape of the Intracluster Medium and the Relation
Huanqing Chen, Camille Avestruz, Andrey V. Kravtsov +2
We use a statistical sample of galaxy clusters from a large cosmological -bodyhydrodynamics simulation to examine the relation between morphology, or shape, of the X-ray emit…
Constraints On Duty Cycles Of Quasars At Z 6
Huanqing Chen, Nickolay Y. Gnedin
We study the mass of quasar-hosting dark matter halos at z 6 and further constrain the fraction of dark matter halos hosting an active quasar and the quasar beaming…
Gas sloshing in Abell 2204: Constraining the properties of the magnetized intracluster medium
Huanqing Chen, Christine Jones, Felipe Andrade-Santos +2
The rich galaxy cluster Abell 2204 exhibits edges in its X-ray surface brightness at and west and east of its center, respectively. The presence of these…