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Accreting Planets Leave Chemical Footprints in Protoplanetary Disks
28 8月 2023Protoplanetary disks serve as the cradles of planet formation, often revealing captivating features such as bright rings and dark gaps in both dust continuum and gas emission maps. These features have traditionally been attributed planets, which shape the disk by gap-opening and altering its rotation profiles, effects that can potentially be observed.A new study led by Tsinghua Department of As...
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Honorary Appointment Ceremony for Distinguished Visiting Professor Puragra Guha Thakurta
07 6月 2023With the COVID panedemic over, the number of international visitors to Tsinghua DOA has visibly increased in 2023. On June 6, we welcomed the arrival of Prof. Puragra Guha Thakurta (UC Santa Cruz), and held a ceremony for his distinguished visiting professorship at Tsinghua over the next three years; He will play active roles in scientific collaborations, student supervisions and public outreac...
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Direct Imaging of Gas Recycling around a Massive Galaxy 11 Billion Years Ago
05 5月 2023Galaxies are the birthplace of most stars and black holes. However, scientists are still debating, how galaxies accrete the fuel to sustain their growth and how they in turn pollute their environment with elements heavier than helium. An international team led by Prof. Zheng Cai at Tsinghua University has now directly observed the neighborhood of a massive galaxy in the early Universe. They fin...
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The earliest multi-arm spiral galaxy confirmed
03 1月 2023JWST multi-band-imaging observations of A2744-DSG-z3, the most distant spiral galaxy that has been seen so far. Image credit: Cai, Wu, Sun, Tsinghua University and The University of Arizona.Spiral-like structures are widely regarded to be caused by gravitational instability, while different spirals are formed in different ways. When and how these spirals form is still a mystery. Fortunately, re...
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Chickens or eggs? ALMA rings as planet factories
12 12月 2022Protoplanetary disks, the cradle of planets, contain a large amount of building blocks for planet formation -- (sub)millimeter-size solid particles -- pebbles. Yet, how, when, and where planets start to form is an outstanding question. In the past decade, through the Atacama Large Millimeter/submillimeter Array (ALMA) in Chile, it was revealed that a large number of protoplanetary disks are rin...
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The 26th Education Forum experience sharing meeting of DOA held
06 9月 2022On September 3rd, the 26th Education Forum experience sharing meeting was held on campus, and 11 faculty members attended the meeting. Prof. Yi Mao first conveyed the spirit of the 26th Tsinghua University Educational Work Symposium at the meeting and discussed relevant issues with the faculty. Afterwards, faculty members shared their insights and experiences in teaching and supervision of PhD ...
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