Chinese scientist duo on team awarded for work in search of space-time ripples
Liu Kuo and Chen Siyuan from the Shanghai Astronomical Observatory (SHAO) were key contributors to the European Pulsar Timing Array (EPTA) consortium, which received the royal society's group achievement award earlier this month. While working at the Max Planck Institute for Radio Astronomy in Bonn, Germany, Liu led a team of researchers from Germany, France, Britain, the Netherlands and other European nations to analyse and release a major pulsar timing data set in 2023, according to SHAO. The data, measured to within a billionth of a second, was built on 25 years of observations from six of the world's most sensitive radio telescopes . Pulsars – rapidly spinning neutron stars – serve as cosmic clocks to reveal the elusive waves through tiny variations in their timing. Members of the EPTA consortium, which has received the Royal Astronomical Society's group achievement award for its work in nanohertz gravitational waves. Photo: EPTA Using this data set, Chen led a team in France at the National Centre for Scientific Research and the Paris Observatory to search for a faint, collective signal from pairs of distant supermassive black holes .
His team successfully identified a signal with a statistical significance of about three sigma, meaning it was unlikely to be noise. The findings matched results from other pulsar timing collaborations, SHAO noted on its WeChat account.
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