Zijian Zhang

Kavli Institute for Astronomy and Astrophysics, Peking University

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Beijing, China

zjz.kiaa@stu.pku.edu.cn

I’m Zijian Zhang, a third year graduate student from Kavli Institute for Astronomy and Astrophysics, Peking University, advised by Prof. Linhua Jiang. My research focuses on the multi-wavelength characteristics of AGNs and their host galaxies, the evolution of high-redshift AGNs/galaxies, and machine-learning/data-driven astrophysical research. Before coming to PKU, I received my Bachelor’s degree from Nanjing University in September 2023.

我叫张子键，是北京大学科维理天文与天体物理研究所的三年级博士研究生，导师是江林华教授。主要研究兴趣为活动星系核及其宿主星系的多波段特性、高红移活动星系核/星系的演化以及机器学习/数据驱动的天体物理学研究。在来北大之前，我于2023年9月在南京大学获得学士学位。

You can find my CV here: Zijian Zhang’s Curriculum Vitae.

news

Mar 01, 2026 New publication added: COSMOS-3D: Black Hole Mass Estimators and Luminosity Functions of Paschen-line AGNs (arXiv e-prints).
Mar 01, 2026 New publication added: Local Analogs of Little Red Dots: Optical Variability and Evidence for an AGN Origin (arXiv e-prints).
Feb 01, 2026 New publication added: JWST Insights into Narrow-line Little Red Dots (The Astrophysical Journal).
May 01, 2025 Our work on multi-epoch JWST imaging of little red dots was published in The Astrophysical Journal.
Apr 01, 2025 Our paper on extremely X-ray variable AGNs in the XMM-LSS field was published in The Astrophysical Journal.

selected publications

  1. JWST Insights into Narrow-line Little Red Dots
    Zijian Zhang, Linhua Jiang, Weiyang Liu, and 2 more authors
    The Astrophysical Journal, Feb 2026
    DOI
    17 ADS citations
  2. Little red dot variability over a century reveals black hole envelope via a giant Einstein cross
    Zijian Zhang, Mingyu Li, Masamune Oguri, and 79 more authors
    arXiv e-prints, Dec 2025
    DOI
    16 ADS citations
  3. Analysis of Multi-epoch JWST Images of  300 Little Red Dots: Tentative Detection of Variability in a Minority of Sources
    Zijian Zhang, Linhua Jiang, Weiyang Liu, and 1 more author
    The Astrophysical Journal, May 2025
    DOI
    69 ADS citations
  4. On the Extremely X-Ray Variable Active Galactic Nuclei in the XMM-LSS Field
    Zijian Zhang, Bin Luo, Linhua Jiang, and 3 more authors
    The Astrophysical Journal, Apr 2025
    DOI
    3 ADS citations
  5. GRB 220408B: A Three-episode Burst from a Precessing Jet
    Zijian Zhang, Yi-Han Iris Yin, Chenyu Wang, and 27 more authors
    Research in Astronomy and Astrophysics, Nov 2023
    DOI
    9 ADS citations
  6. XMM-Newton Observations of Two Archival X-Ray Weak Type 1 Quasars: Obscuration Induced X-Ray Weakness and Variability
    Zijian Zhang, Bin Luo, W. N. Brandt, and 6 more authors
    The Astrophysical Journal, Sep 2023
    DOI
    7 ADS citations