I received B.Sc. in Astronomy from Nanjing University, China, in 2005. In 2015, and obtained Ph.D. in Natural Sciences (Dr. rer. nat.) from Heidelberg University, Germany. In 2019, I joined the faculty of the School of Astronomy and Space Science at Nanjing University. My research has been supported by grants such as the National Natural Science Foundation of China (NSFC) Excellent Young Scientists Fund (Overseas), an NSFC Key Program project, and the Jiangsu Provincial Natural Science Foundation for Distinguished Young Scholars.

Theoretical Astrophysics

• Semester: Second Semester of Junior Year (Spring Semester)

• Course Type: Core Course (or Required Core Course)

Messengers from the Cosmos: An Introduction to Multi-Messenger Astronomy

• Semester: First Semester of Freshman Year (Fall Semester)

• Course Type: Freshman Seminar

My primary research interests lie in high-energy astrophysics and particle astrophysics, with a particular focus on the astrophysical origins of extraterrestrial high-energy particles (cosmic rays, photons, and neutrinos), the properties of relevant astrophysical sources (such as pulsar wind nebulae, active galactic nuclei, and gamma-ray bursts), as well as the mechanisms of particle acceleration and transport.

I have published more than 160 peer-reviewed papers in SCI-indexed journals, with over 10,000 citations. Among these, approximately 70 papers were published as first author or (co-)corresponding author (click here for a list of these publications). 

Ten recent representative publications:

01. Diagnosing interstellar magnetic turbulence with TeV pulsar halos, Physical Review D, 13, L021303 (2026), by Chao-Ming Li, Ruo-Yu Liu* & Huirong Yan

02. Ultrahigh-Energy Gamma-ray Emission Associated with Black Hole-Jet Systems, National Science Review, 12, nwaf496 (2025), by The LHAASO Collaboration (incl. Ruo-Yu Liu*)

03. Mirages and Large TeV Halo-Pulsar Offsets from Cosmic-Ray Propagation, Physical Review Letters, 135,191002 (2025), by Yiwei Bao, G. Giacinti*, Ruo-Yu Liu*, Hai-Ming Zhang & Yang Chen*

04. Insights from LHAASO and IceCube into the Origin of the Galactic Diffuse TeV-PeV Emission, Nature Astronomy, 8, 628 (2024), by Kai Yan, Ruo-Yu Liu*, Rui Zhang, Chao-Ming Li, Qiang Yuan & Xiang-Yu Wang

05. A magnetized Galactic halo from inner Galaxy outflows, Nature Astronomy, 8, 1416 (2024), by He-Shou Zhang*, G. Ponti*, E. Carretti*, Ruo-Yu Liu*, M. Morris*, et al.

06. An ultrahigh-energy γ-ray bubble powered by a super PeVatron, Science Bulletin, 69, 449 (2024), by The LHAASO Collaboration (incl. Ruo-Yu Liu*)

07. A multizone view on the multiwavelength emission of blazars, Montyly Notices of Royal Astronomical Society, 526, 5054 (2023), by Ruo-Yu Liu*, Rui Xue*, Ze-Rui Wang*, Hong-Bin Tan & Markus Böttcher

08. Peta-electron volt gamma-ray emission from the Crab Nebula, Science, 373, 425 (2021), by The LHAASO Collaboration (incl. Ruo-Yu Liu*)

09. Ultrahigh-energy photons up to 1.4 petaelectronvolts from 12 γ-ray Galactic sources, Nature, 594, 33 (2021), by The LHAASO Collaboration (incl. Ruo-Yu Liu*)

10. Understanding the Multiwavelength Observation of Geminga's Tev Halo: The Role of Anisotropic Diffusion of Particles, Physical Review Letters, 123, 221103 (2019), by Ruo-Yu Liu*, Huirong Yan* & Heshou Zhang