Gravitational-wave research in China: overview Eric O. L EBIGOT Tsinghua University, Beijing University of Paris 7 / CNRS (APC) 1.

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Presentation transcript:

Gravitational-wave research in China: overview Eric O. L EBIGOT Tsinghua University, Beijing University of Paris 7 / CNRS (APC) 1

Main themes Detection of gravitational waves (GW) Study of gravitation (including theory) Electromagnetic follow-up after GW detection 2

GRAVITATIONAL-WAVE DETECTION 3

Space gravitational-wave observatory Interferometer in space: ASTROD-GW proposed ◦ Low-frequency GW (~1–0.01 Hz) Nanjing U, Chin. Acad. Sc., Chin. Space Agency,… Plus: collaboration with Europe on the similar New Gravitational wave Observatory (NGO) 4

Use of Pulsar Timing Arrays Gravitational waves make pulsars shimmer: measurement of the arrival time of radio waves from an array of pulsars Chinese 500-meter Spherical Telescope (FAST) under construction 5 (computer image)

Collaboration with LIGO (MIT- Caltech) Laser Interferometer Gravitational-Wave Observatory 6

Collaboration with LIGO Automatic detection of interferometer glitches Detection of Compact Binary Coalescence with GPU acceleration Easy access to the LIGO software suite through a virtual machine At Tsinghua U (Beijing) 7

High-frequency gravitational waves (~0.1–10 GHz) Proposed by Prof. L I Fangyu (Chongqing): coupling of gravitational waves with electromagnetic waves in a strong magnetic field Detector in development (Chongqing) Congqing U, Shanghai Inst. of Optics and Mech., Chengdu Microwave Laboratory,… 8

ELECTROMAGNETIC FOLLOW-UP (AFTER GRAVITATIONAL-WAVE DETECTION) 9

SVOM: X rays (4 keV–5 MeV) Gamma ray burst detection 1 satellite, 3 ground-based instruments French-Chinese collaboration (Nat. Astronomical Observatories [Beijing], Tsinghua U [Beijing],…) 10

Hard X-ray Modulation Telescope (20–200 keV) Can be used for X-ray follow-up Launch in 2014–2016 China's first astronomy satellite Chin. Acad. of Sciences, Tsinghua U (Beijing),… 11

STUDY OF GRAVITY 12

Measurement of the speed of gravity Measurement of small changes in the Earth surface Prof. T ANG Keyun et al., World Data Center for Geophysics (Beijing) 13

Theory 14

THERE IS MORE… 15

THANK YOU! 谢谢你们！ 16