Abstract
The Tianlai project is a radio astronomical experiment dedicated to the study of the nature of dark energy. By observing the baryon acoustic oscillation (BAO) features in the large scale structure power spectrum through 21cm intensity mapping, i.e. observe the intensity variation of the 21cm line emission of the neutral hydrogen at redshifts 0<z<3 without resolving the individual galaxies which host these neutral hydrogen atoms. The BAO features in the power spectrum can be used as standard ruler for distance measurement, by measuring it at different redshifts, the dark energy equation of state can be determined. In order to achieve high precision, it is necessary to observe large sky area with high precision, and the design of the Tianlai experiment is optimized for this. The full scale experiment requires a compact array with a geometric dimension of (100m) <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">2</sup> , and filled with receiver elements. The Tianlai pathfinder, which is being built in a radio quiet site in Xinjiang, China, consists of 3 cylinders of 15m wide and 40 m long. The project is an international effort with participants from China, France, the USA and Canada.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
