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2021 Work Shift During Winter Break

Wed, 2021-01-20

Most Distant Quasar Discovered Sheds Light on How Black Holes Grow

Thu, 2021-01-14A team of astronomers led by the University of Arizona has observed a luminous quasar 13.03 billion light-years from Earth – the most distant quasar discovered to date. Two KIAA astronomers, Linhua Jiang and Xue-Bing Wu, joined the research team.

Luis Ho Interviewed by the AAS Journals

Tue, 2021-01-05Luis Ho was invited by the American Astronomical Society (AAS) for an interview with the Senior Lead Editor of the AAS Journals, Prof. Frank Timmes.

New 3D view of the dense interstellar gas in Milky Way

Wed, 2020-12-23An international research team of more than 50 astronomers (including KIAA faculty Ke Wang) led by the Max Planck Institute for Radio Astronomy in Bonn, Germany, used the APEX submillimeter telescope at 5100 m altitude in Chile to look deep into the galactic plane and measure the interstellar medium.

Elliptical accretion disk as a model for tidal disruption events: A Jerusalem bagel from Beijing

Tue, 2020-12-15When a star passing closely enough by a supermassive black hole is disrupted by tidal forces, the stellar debris falls onto the black hole triggering a tidal disruption event (TDE). It is commonly assumed that the accretion disk that forms circularizes efficiently, because of the relativistic apsidal precession and interactions between the crossing streams of matter. This picture is challenged by observations of the optical/UV spectra and the total bolometric output of the TDEs. If the circularization is inefficient, which is suggested by some numerical simulations, such low angular momentum accretion flow should result in a formation of an elliptical accretion disk. Such a model, with radiation originating from the shocks at the self-intersection of streams and being called self-crossing shock model in the community, was proposed by Tsvi Piran and colleagues.

Spectroscopic confirmation of the most distant galaxy at redshift 10.957

Tue, 2020-12-15An international team of astronomers, led by Professor Linhua Jiang at KIAA, obtained near-infrared spectra and successfully measured the redshift of a very faint galaxy 13.4 billion light-years away, the most distant astrophysical object known to date. Meanwhile, the team also detected a burst signal with a duration of minutes from the galaxy, which can be explained as an ultraviolet flash associated with a gamma-ray burst (GRB). These results are important to understand the formation of stars and galaxies in the very early Universe). Two papers based on the results were recently published in Nature Astronomy.

KIAA Postdocs win PKU Outstanding Postdoc Award, Boya Fellowship

Fri, 2020-11-27KIAA postdoc Hassen Yesuf won a PKU Outstanding Postdoc Award while postdoc Rui Xu won a second 2-year PKU Boya Fellowship.  

PKU PhD graduate Siyao Xu becomes first astronomer to win two Hubble Fellowships

Thu, 2020-11-26Dr.Xu received her PhD from the Department of Astronomy at Peking University in 2017. She was awarded her first Hubble Fellowship to work at University of Wisconsin-Madison with Prof. Alex Lazarian.

Opening Ceremony for the Chinese Space Station Telescope Peking University Science Center

Tue, 2020-11-24On November 21, 2020, the opening ceremony of Chinese Space Station Telescope Peking University Science Center (CSST PKU Center) was held at the Yingjie Exchange Center of Peking University.  

New features of fast radio bursts revealed by FAST radio telescope

Fri, 2020-11-06On October 29th and November 4th, 2020, the research journal “Nature” published two articles on FRBs using FAST: 1) “Diverse polarization angle swings from a repeating fast radio burst source” and 2) “No pulsed radio emission during a bursting phase of a Galactic magnetar”. In both works, researchers from Kavli Institute for Astronomy and Astrophysics (Peking university), National Astronomical Observatory (Chinese academy of science), and University of Nevada formed the core team.
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