Latest News

NGPS passed pre-ship international review and technical tests

Thu, 2023-07-20NGPS, an optical spectrograph jointly developed by Peking University, the National Astronomical Observatories of the Chinese Academy of Sciences (CAS), the Nanjing Institute of Astronomical Optics & Technology of CAS, and the California Institute of Technology, passed the pre-ship international review on July 12-13 2023.

PKUers finds Key Evidence for Existence of Nanohertz Gravitational Waves

Thu, 2023-06-29A group of Chinese scientists has recently found key evidence for the existence of nanohertz gravitational waves, marking a new era in nanohertz gravitational wave research. The research was based on pulsar timing observations carried out with the Five-hundred-meter Aperture Spherical Telescope (FAST).The research was conducted by the Chinese Pulsar Timing Array (CPTA) collaboration. Researchers (Prof. Kejia Lee, Post-Doc. Siyuan Chen, PhD students Jiangwei Xu, and Zihan Xue) from Department of Astronomy School of physics and Kavli Institute of Astronomy and Astrophysics of Peking University played vital roles in the collaboration. Their findings were published online in the academic journal Research in Astronomy and Astrophysics (RAA).

Starlight and the First Black Holes: Researchers Probe the Relationship Between the Black Holes and the Host Galaxi...

Thu, 2023-06-29​New images from the James Webb Space Telescope (JWST) have revealed, for the first time, starlight from two massive galaxies hosting actively growing black holes – quasars – seen less than a billion years after the Big Bang. The black holes have masses are close to a billion times that of the Sun, and the host galaxy masses are almost one hundred times larger, a ratio similar to what is found in the more recent universe. A powerful combination of the wide-field survey of the Subaru Telescope and the JWST has paved a new path to study the distant universe, reports a new study in Nature.

Astronomers image winds from the terrestrial planet forming region of a nearby disk

Mon, 2023-06-19In an article in Nature Astronomy published on June 19, a team of international astronomers, led by Purple Mountain Observatory (PMO) and Kavli Institute of Astronomy and Astrophysics at Peking University (PKU/KIAA), reported the highest resolution images ever obtained of the wind from one of these disks. The physical scale of 3.5 AU is small enough to measure the physics in regions where terrestrial planets form. Interpreting the images with state-of-the-art simulations led to surprising results that alter our view of the physics that determines how disks evolve.

Dr. Kai Wang awarded best oral presentation at the 25th Guoshoujing Symposium

Mon, 2023-05-29Dr. Kai Wang and five other presenters from other institutes were selected for best oral presentations at the 25th Chinese Astronomical Society Guoshoujing Symposium on Galaxies and Cosmology.  

Mini Workshop on Compact Objects and Gravitational Waves held at KIAA

Sun, 2023-05-07A one-day workshop on the topic of compact objects and gravitational waves was recently held on 2023 April 19. Over 30 undergraduates, PhDs, postdocs and faculty members participated in the event, with a special guest, Prof. Ian Jones, visiting from the University of Southampton,UK.

Luis C. Ho Elected as a Member of the American Academy of Arts and Sciences

Thu, 2023-04-20Luis C. Ho, Director of KIAA and Chair Professor of Peking University, has been elected as a new member of the American Academy of Arts and Sciences (AAAS).

2023 Postdoc Science Day

Fri, 2023-03-24The postdoc science day was held on Wednesday, Mar. 22. This annual event provides an opportunity for postdocs to communicate their research interests, recent advances, and future plans, while also promoting discussions and potential collaborations among postdocs in different research fields.

The giant binary black hole in OJ 287 is “slimmed” by the latest observations

Thu, 2023-02-23An international research group including Professor Fukun Liu at The Department of Astronomy and The Kavli Institute for Astronomy and Astrophysics of Peking University in Beijing, China, presents important new results on the active galaxy OJ 287, based on the most dense and longest radio-to-high-energy observations to date. The scientists were able to test crucial binary model predictions using multiple observing tools, including the Effelsberg radio telescope and the Neil Gehrels Swift Observatory. The team measured an independent mass of the black hole mass and the mass in the disk that surrounds the black hole. The results show that an exceptionally massive black hole exceeding 10 billion solar masses is no longer needed. Instead, the results favor models with a smaller mass of 100 million solar masses for the primary black hole, consistent with the results obtained about twenty year ago by Fukun Liu and Xue-Bing Wu, also at Peking University. Several outstanding mysteries, including the apparent absence of the latest big outburst of OJ 287 (which has now been identified) and the much-discussed emission mechanism during the main outbursts, can be solved this way. Independent results on blazar physics that trace processes near the jet launching region were obtained. The findings are presented in two papers published in MNRAS Letters and the Astrophysical Journal.

KIAA welcomes Dr. Fangzhou Jiang (姜方周) as a new faculty member

Mon, 2023-02-20Dr. Jiang obtained his PhD from Yale University in 2016. He was a Troesh Scholar at California Institute of Technology and a Joint Theory Fellow at the Carnegie Observatories from 2020 to 2023, and an Israeli Planning-and-Budget-Committee Fellow at the Hebrew University of Jerusalem from 2016 to 2019.