Liu Yu
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Supervisor of Doctorate Candidates
Supervisor of Master's Candidates
- Doctoral Supervisor
- Master Tutor
- Business Address:x30353
- Academic Titles:Director of the Center for Astrophysics, SWJTU
- Other Post:实测天体物理团队负责人
- Alma Mater:中国科学院研究生院（现国科大）
- Supervisor of Doctorate Candidates
- Supervisor of Master's Candidates
- School/Department:School of Physical Science and Technology
- Discipline:Astrophysics.
Space Physics
Plasmphysics
Contact Information
- Email：
- Paper Publications
[Title] Gamma-ray bursts calibrated from the observational H(z) data in artificial neural network framework
- Impact Factor:10.5
- DOI number:10.1016/j.jheap.2025.100377
- Teaching and Research Group:天体物理
- Journal:Journal of High Energy Astrophysics
- Key Words:gamma-ray bursts;general cosmology;dark energy；observations
- Abstract:In this paper,we calibrate the luminosity relation of gamma-ray bursts (GRBs) from an Artificial Neural Network (ANN) framework for reconstructing the Hubble parameter H(z) from the latest observational Hubble data (OHD) obtained with the cosmic chronometers method in a cosmology-independent way. We introduce the covariance matrix and KL divergence into the loss function to calibrate the Amati relation with the A219 and J220 GRB samples at low redshift. Combining GRBs at high redshift with the Pantheon+ supernovae sample and baryon acoustic oscillation data,we find that the ΛCDM model is preferred over the wCDM and CPL models according to the Akaike and Bayesian information criteria.
- Co-author:Xiong ZG,Luo X,Wang GZ,Liu Y,Liang N
- First Author:Huang Z
- Document Code:012
- Discipline:Science
- First-Level Discipline:Astronomy
- Volume:47
- Page Number:9
- ISSN No.:2214-4048
- Translation or Not:no
- Date of Publication:2025-07-01