Publications (55)
No Training, Better Flights: Test-Time Scaled VLMs for UAV Navigation
Feinan Cheng, Dongliang Xu, Wenli Nong +4
Test-time scaling offers a promising method to improve the inference performance of Vision-Language Models (VLMs) without additional training. Existing approaches to vision-languag…
Sterile Neutrino Portal Dark Matter in THDM
Ang Liu, Feng-Lan Shao, Zhi-Long Han +2
In this paper, we propose the sterile neutrino portal dark matter in THDM. This model can naturally generate tiny neutrino mass with the neutrinophilic scalar doublet a…
The eROSITA Final Equatorial-Depth Survey (eFEDS): A Machine Learning Approach to Infer Galaxy Cluster Masses from eROSITA X-ray Images
Sven Krippendorf, Nicolas Baron Perez, Esra Bulbul +15
We develop a neural network based pipeline to estimate masses of galaxy clusters with a known redshift directly from photon information in X-rays. Our neural networks are trained u…
Conversion-Driven Dark Matter in
Jing-Jing Zhang, Zhi-Long Han, Ang Liu +1
The new gauge boson in is widely considered as the mediator of dark matter. In this paper, we propose the conversion-driven dark matter in . The dark…
Depression Detection using Resting State Three-channel EEG Signal
Qiuxia Shi, Ang Liu, Rongyan Chen +3
In universal environment, a patient-friendly inexpensive method is needed to realize the early diagnosis of depression, which is believed to be an effective way to reduce the morta…
Similar Data Points Identification with LLM: A Human-in-the-loop Strategy Using Summarization and Hidden State Insights
Xianlong Zeng, Yijing Gao, Fanghao Song +1
This study introduces a simple yet effective method for identifying similar data points across non-free text domains, such as tabular and image data, using Large Language Models (L…
The Chemical Evolution of Galaxy Clusters: Dissecting the Iron Mass Budget of the Intracluster Medium
Ang Liu, Paolo Tozzi, Stefano Ettori +4
We study the chemical evolution of galaxy clusters by measuring the iron mass in the ICM after dissecting the abundance profiles into different components. We use Chandra archival…
Leptogenesis and Dark Matter from Low Scale Seesaw
Ang Liu, Zhi-Long Han, Yi Jin +1
In this paper, we perform a detail analysis on leptogenesis and dark matter form low scale seesaw. In the framework of 2HDM, we further introduce one scalar singlet and on…
Silicon Nanostructures for Biosensing: From Field-Effect Transistors to Photonic Resonators, and the Long Road to the Clinic
Ang Liu, Jun Cao, Zhihao Sun +1
Silicon has a unique combination of properties that makes it one of the best material choices for biosensor platforms: it is inexpensive, its native oxide is atomically smooth, its…
Science objectives of the Einstein Probe mission
Weimin Yuan, Lixin Dai, Hua Feng +93
The Einstein Probe (EP) is an interdisciplinary mission of time-domain and X-ray astronomy. Equipped with a wide-field lobster-eye X-ray focusing imager, EP will discover cosmic X-…
The eROSITA view of the Abell 3391/95 field: The Northern Clump. The largest infalling structure in the longest known gas filament observed with eROSITA, XMM-Newton, and Chandra
Angie Veronica, Yuanyuan Su, Veronica Biffi +18
SRG/eROSITA PV observations revealed the A3391/95 cluster system and the Northern Clump (MCXC J0621.7-5242 galaxy cluster) are aligning along a cosmic filament in soft X-rays, simi…
City landscape in sight: A crowdsourced framework for unlocking urban-scale window view perceptions from real estate imagery
Chucai Peng, Sijie Yang, Ang Liu +3
City landscapes viewed through home windows influence quality of life, yet perceptions of actual window views at the urban scale remain understudied. This study presents an approac…
Enhancing Large-Scale AI Training Efficiency: The C4 Solution for Real-Time Anomaly Detection and Communication Optimization
Jianbo Dong, Bin Luo, Jun Zhang +22
The emergence of Large Language Models (LLMs) has necessitated the adoption of distributed training techniques, involving the deployment of thousands of GPUs to train a single mode…
The SRG/eROSITA All-Sky Survey: Weak-Lensing of eRASS1 Galaxy Clusters in KiDS-1000 and Consistency Checks with DES Y3 & HSC-Y3
Florian Kleinebreil, Sebastian Grandis, Tim Schrabback +21
We aim to participate in the calibration of the X-ray photon count rate to halo mass scaling relation of galaxy clusters selected in the first eROSITA All-Sky Survey on the Western…
Inside a Beehive: the Multiple Merging Processes in the Galaxy Cluster Abell 2142
Ang Liu, Heng Yu, Antonaldo Diaferio +5
To investigate the dynamics of the galaxy cluster A2142, we compile an extended catalog of 2239 spectroscopic redshifts of sources, including newly measured 237 redshifts, within 3…
The warm-hot intergalactic medium in inter-cluster filaments -- A forecast for HUBS observations based on eRASS1 superclusters
Yuanyuan Zhao, Haiguang Xu, Ang Liu +8
Cosmological simulations indicate that nearly half of the baryons in the nearby Universe are in the warm-hot intergalactic medium (WHIM) phase, and about a half them reside in cosm…
The hot circumgalactic medium in the eROSITA All-Sky Survey I. X-ray surface brightness profiles
Yi Zhang, Johan Comparat, Gabriele Ponti +17
The circumgalactic medium (CGM) provides the material needed for galaxy formation and influences galaxy evolution. The hot () CGM is poorly detected around galaxies with s…
The Eighteenth Data Release of the Sloan Digital Sky Surveys: Targeting and First Spectra from SDSS-V
Andrés Almeida, Scott F. Anderson, Maria Argudo-Fernández +151
The eighteenth data release of the Sloan Digital Sky Surveys (SDSS) is the first one for SDSS-V, the fifth generation of the survey. SDSS-V comprises three primary scientific progr…
Radio Frequency Field-Induced Enhancement of Detection Sensitivity in Silicon Nanowire Sensors
Ang Liu, Jingsong Shang, Jiangang J. Du +2
Sensitive biomarker detection in physiological fluids is often limited by Debye screening, which suppresses electrostatic signals at sensor surfaces. Here we report a sensing appro…
The SRG/eROSITA All-Sky Survey : Subaru/HSC-SSP weak-lensing mass measurements for the eRASS1 Galaxy Clusters
Nobuhiro Okabe, Thomas H. Reiprich, Sebastian Grandis +20
We performed individual weak-lensing (WL) mass measurements for 78 eROSITA's first All-Sky Survey (eRASS1) clusters in the footprint of Hyper Suprime-Cam Subaru Strategic Program (…
The eROSITA Final Equatorial-Depth Survey (eFEDS): X-ray Observable-to-Mass-and-Redshift Relations of Galaxy Clusters and Groups with Weak-Lensing Mass Calibration from the Hyper Suprime-Cam Subaru Strategic Program Survey
I-Non Chiu, Vittorio Ghirardini, Ang Liu +18
We present the first weak-lensing mass calibration and X-ray scaling relations of galaxy clusters and groups selected in the Final Equatorial Depth Survey (eFEDS) observe…
The hot circumgalactic medium in the eROSITA All-Sky Survey III. Star-forming and quiescent galaxies
Yi Zhang, Johan Comparat, Gabriele Ponti +17
The circumgalactic medium (CGM), as the gas repository for star formation, might contain the answer to the mysterious galaxy quenching and bimodal galaxy population origin. We meas…
Shinning Light on Sterile Neutrino Portal Dark Matter from Cosmology and Collider
Ang Liu, Feng-Lan Shao, Zhi-Long Han +2
Provided the dark sector consisted of a dark scalar and a dark fermion under an exact symmetry, the sterile neutrino can act as the messenger between the dark s…
The SRG/eROSITA All-Sky Survey: Large-scale view of the Centaurus cluster
Angie Veronica, Thomas H. Reiprich, Florian Pacaud +9
Methods. We utilized the combined five SRG/eROSITA All-Sky Survey data (eRASS:5) to perform X-ray imaging and spectral analyses of the Centaurus cluster in various directions to la…
The hot circumgalactic medium in the eROSITA All-Sky Survey II. Scaling relations between X-ray luminosity and galaxies' mass
Yi Zhang, Johan Comparat, Gabriele Ponti +16
Understanding how the properties of galaxies relate to the properties of the hot circum-galactic medium (CGM) around them can constrain galaxy evolution models. We measured the X-r…
The eROSITA Final Equatorial-Depth Survey (eFEDS): X-ray Properties and Scaling Relations of Galaxy Clusters and Groups
Y. Emre Bahar, Esra Bulbul, Nicolas Clerc +16
We investigate the scaling relations between X-ray observables of the clusters detected in the eFEDS field using Spectrum-Roentgen-Gamma/eROSITA observations taking into account th…
Local Group Analogs in CDM cosmological simulations
Meng Zhai, Qi Guo, Gang Zhao +2
We use semi-analytic galaxy catalogs based on two high-resolution cosmological -body simulations, Millennium-WMAP7 and Millennium-II, to investigate the formation of the Local G…
The Spiderweb proto-cluster is being magnetized by its central radio jet
Craig S. Anderson, Christopher L. Carilli, Paolo Tozzi +10
We present deep broadband radio polarization observations of the Spiderweb radio galaxy (J1140-2629) in a galaxy proto-cluster at . These yield the most detailed polarimetr…
H1821+643: The most X-ray and infrared luminous AGN in the Swift/BAT survey in the process of rapid stellar and supermassive black hole mass assembly
Hikaru Fukuchi, Kohei Ichikawa, Masayuki Akiyama +6
H1821+643 is the most X-ray luminous non-beamed AGN of erg s in the Swift/BAT ultra-hard X-ray survey and it is also a hyper-lumin…
X-ray Emission and Radio Emission from the Jets and Lobes of the Spiderweb Radio Galaxy
Christopher L. Carilli, Craig S. Anderson, Paolo Tozzi +12
Deep Chandra and VLA imaging reveals a clear correlation between X-ray and radio emission on scales ~kpc in the Spiderweb radio galaxy at z=2.16. The X-ray emission assoc…
Systematic search for lensed X-ray sources in the CLASH fields
Ang Liu, Paolo Tozzi, Piero Rosati +8
We search for unresolved X-ray emission from lensed sources in the FOV of 11 CLASH clusters with Chandra data. We consider the solid angle in the lens plane corresponding to a magn…
On the origin of central abundance drops in the intracluster medium of galaxy groups and clusters
Ang Liu, Meng Zhai, Paolo Tozzi
A central drop of ICM Fe abundance has been observed in several cool-core clusters. It has been proposed that this abundance drop may be due, at least partially, to the depletion o…
The life of central radio galaxies in clusters: AGN-ICM studies of eRASS1 clusters in the ASKAP fields
Angie Veronica, Thomas H. Reiprich, Florian Pacaud +35
The mechanical feedback from the central AGNs can be crucial for balancing the radiative cooling of the intracluster medium at the cluster centre. We aim to understand the relation…
The Three Hundred: Gas Properties Outside of Galaxy Cluster with the WHIM Contribution and Detection
Renjie Li, Weiguang Cui, Ang Liu +4
We investigate the physical properties and detectability of warm-hot intergalactic medium (WHIM) gas with temperatures in the range K around galaxy clusters using simu…
Common Origin of Dark Matter and Leptogenesis in
Ang Liu, Feng-Lan Shao, Zhi-Long Han +2
In this paper, we investigate the common parameter space of dark matter and leptogenesis in the symmetry. This model involves a complex scalar , sterile neutrinos…
Coscattering Dark Matter in the Inverse Scotogenic Models
Ang Liu, Zhi-Long Han, Fei Huang +2
The Scotogenic mechanism is an appealing pathway to naturally explain the common origin of dark matter and tiny neutrino mass. However, the conventional scotogenic dark matter usua…
The SRG/eROSITA All-Sky Survey. The Weak-Lensing Mass Calibration and the Stellar Mass-to-Halo Mass Relation from the Hyper Suprime-Cam Subaru Strategic Program
I-Non Chiu, Vittorio Ghirardini, Sebastian Grandis +23
We present the weak-lensing mass calibration and constrain the BCG (brightest cluster galaxy) stellar-mass-to-halo-mass-and-redshift () relation for a s…
Opportunities and challenges of ChatGPT for design knowledge management
Xin Hu, Yu Tian, Keisuke Nagato +2
Recent advancements in Natural Language Processing have opened up new possibilities for the development of large language models like ChatGPT, which can facilitate knowledge manage…
The eROSITA Final Equatorial-Depth Survey (eFEDS): Galaxy Clusters and Groups in Disguise
Esra Bulbul, Ang Liu, Thomas Pasini +21
The eROSITA Final Equatorial-Depth Survey (eFEDS), executed during the performance verification phase of the Spectrum-Roentgen-Gamma (SRG)/eROSITA telescope, was completed in Nov.…
Extended X-ray Monitoring of Gravitational Lenses with Chandra and Joint Constraints on X-ray Emission Regions
Eduardo Guerras, Xinyu Dai, Shaun Steele +5
We present an X-ray photometric analysis of six gravitationally lensed quasars, with observation campaigns spanning from 5 to 14 years, measuring the total (0.83 - 21.8 keV restfra…
Reviving Portal Dark Matter with Conversion Mechanism
Zhen-Wei Wang, Zhi-Long Han, Fei Huang +2
In many new physics models with extended gauge symmetry, the new gauge boson could mediate the interactions between the dark matter and standard model particles. For the conve…
Cross-correlation between soft X-rays and galaxies A new benchmark for galaxy evolution models
Johan Comparat, Andrea Merloni, Gabriele Ponti +11
This article presents the construction and validation of complete stellar mass-selected, volume-limited galaxy samples using the Legacy Survey (data release 10) galaxy catalogs, co…
Hydrostatic Mass Profiles of Galaxy Clusters in the eROSITA Survey
Dominik Scheck, Jeremy S. Sanders, Veronica Biffi +3
To assume hydrostatic equilibrium between the intracluster medium and the gravitational potential of galaxy clusters is an extensively used method to investigate their total masses…
Portal Dark Matter with Observable
Ang Liu, Zhi-Long Han, Fei Huang
In the conventional portal dark matter scenario, the prediction of detectable dark matter typically relies on the collider sensitivities of and direct de…
Unveiling the Sources of X-ray Luminosity in DESI Galaxy Groups: Insights from the SRG/eROSITA All-Sky Survey
YunLiang Zheng, Xiaohu Yang, Teng Liu +10
We use the first eROSITA all-sky survey (eRASS1) to investigate the contributions of AGN and extended gas to the total X-ray luminosity () of galaxy groups with different halo…
Large-scale and local environmental drivers of quenching: tracing H concentration in X-ray and optical galaxy groups
Stefania Barsanti, Di Wang, Matthew Colless +11
To explore the environmental mechanisms causing quenching in nearby star-forming galaxies, we study the variation with local and large-scale environments of a star formation concen…
The eROSITA view of the Abell 3391/95 field: Cluster Outskirts and Filaments
Angie Veronica, Thomas H. Reiprich, Florian Pacaud +17
Aims. We aim to characterize the gas properties in the cluster outskirts () and in the detected inter-cluster filaments () of the A3391/95 system and t…
A method to search for bulk motions in the ICM with {\sl Chandra} CCD spectra: application to the Bullet cluster
Ang Liu, Heng Yu, Paolo Tozzi +1
We propose a strategy to search for bulk motions in the intracluster medium (ICM) of merging clusters based on {\sl Chandra} CCD data. Our goal is to derive robust measurements of…
Searching for bulk motions in the ICM of massive, merging clusters with Chandra CCD data
Ang Liu, Heng Yu, Paolo Tozzi +1
We search for bulk motions in the intracluster medium (ICM) of massive clusters showing evidence of an ongoing or recent major merger with spatially resolved spectroscopy in {\sl C…
Sterile Neutrino Portal Dark Matter from Semi-Production
Ang Liu, Feng-Lan Shao, Zhi-Long Han +2
In this paper, we study the feeble sterile neutrino portal dark matter under the symmetry. The dark sector consists of one fermion singlet and one scalar singlet , w…
The SRG/eROSITA All-Sky Survey: View of the Virgo Cluster
Hannah McCall, Thomas H. Reiprich, Angie Veronica +11
As the closest galaxy cluster, the Virgo Cluster is an exemplary environment for the study of the large-scale filamentary structure and physical effects that are present in cluster…
Gas thermodynamics meets galaxy kinematics: Joint mass measurements for eROSITA galaxy clusters
Pengfei Li, Ang Liu, Matthias Kluge +13
The mass of galaxy clusters is a critical quantity for probing cluster cosmology and testing theories of gravity, but its measurement could be biased given assumptions are inevitab…
Testing the rotation versus merger scenario in the galaxy cluster Abell 2107
Ang Liu, Paolo Tozzi
We search for global rotation of the intracluster medium (ICM) in the galaxy cluster Abell 2107, where previous studies have detected rotational motion in the member galaxies with…
Spatial Distribution of Metals in the ICM: Evolution of the Iron Excess in Relaxed Galaxy Clusters
Ang Liu, Paolo Tozzi, Heng Yu +2
We investigate the spatial distribution of iron in the intra-cluster medium in a selected sample of 41 relaxed clusters in the redshift range using {\sl Chandra}…
Establishing the X-ray Source Detection Strategy for eROSITA with Simulations
Teng Liu, Andrea Merloni, Johan Comparat +25
The eROSITA X-ray telescope on board the Spectrum-Roentgen-Gamma (SRG) satellite has started to detect new X-ray sources over the full sky at an unprecedented rate. Understanding t…